Test verifier/spill_fill.c automatically converted to use inline assembly.
Signed-off-by: Eduard Zingerman <eddyz87@xxxxxxxxx>
---
.../selftests/bpf/prog_tests/verifier.c | 2 +
.../selftests/bpf/progs/verifier_spill_fill.c | 374 ++++++++++++++++++
.../selftests/bpf/verifier/spill_fill.c | 345 ----------------
3 files changed, 376 insertions(+), 345 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/verifier_spill_fill.c
delete mode 100644 tools/testing/selftests/bpf/verifier/spill_fill.c
diff --git a/tools/testing/selftests/bpf/prog_tests/verifier.c b/tools/testing/selftests/bpf/prog_tests/verifier.c
index df5fc6fe1647..e2b131d2ba94 100644
--- a/tools/testing/selftests/bpf/prog_tests/verifier.c
+++ b/tools/testing/selftests/bpf/prog_tests/verifier.c
@@ -31,6 +31,7 @@
#include "verifier_raw_stack.skel.h"
#include "verifier_raw_tp_writable.skel.h"
#include "verifier_ringbuf.skel.h"
+#include "verifier_spill_fill.skel.h"
__maybe_unused
static void run_tests_aux(const char *skel_name, skel_elf_bytes_fn elf_bytes_factory)
@@ -84,3 +85,4 @@ void test_verifier_meta_access(void) { RUN(verifier_meta_access); }
void test_verifier_raw_stack(void) { RUN(verifier_raw_stack); }
void test_verifier_raw_tp_writable(void) { RUN(verifier_raw_tp_writable); }
void test_verifier_ringbuf(void) { RUN(verifier_ringbuf); }
+void test_verifier_spill_fill(void) { RUN(verifier_spill_fill); }
diff --git a/tools/testing/selftests/bpf/progs/verifier_spill_fill.c b/tools/testing/selftests/bpf/progs/verifier_spill_fill.c
new file mode 100644
index 000000000000..136e5530b72c
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/verifier_spill_fill.c
@@ -0,0 +1,374 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Converted from tools/testing/selftests/bpf/verifier/spill_fill.c */
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+struct {
+ __uint(type, BPF_MAP_TYPE_RINGBUF);
+ __uint(max_entries, 4096);
+} map_ringbuf SEC(".maps");
+
+SEC("socket")
+__description("check valid spill/fill")
+__success __failure_unpriv __msg_unpriv("R0 leaks addr")
+__retval(POINTER_VALUE)
+__naked void check_valid_spill_fill(void)
+{
+ asm volatile (" \
+ /* spill R1(ctx) into stack */ \
+ *(u64*)(r10 - 8) = r1; \
+ /* fill it back into R2 */ \
+ r2 = *(u64*)(r10 - 8); \
+ /* should be able to access R0 = *(R2 + 8) */ \
+ /* BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 8), */\
+ r0 = r2; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("check valid spill/fill, skb mark")
+__success __success_unpriv __retval(0)
+__naked void valid_spill_fill_skb_mark(void)
+{
+ asm volatile (" \
+ r6 = r1; \
+ *(u64*)(r10 - 8) = r6; \
+ r0 = *(u64*)(r10 - 8); \
+ r0 = *(u32*)(r0 + %[__sk_buff_mark]); \
+ exit; \
+" :
+ : __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark))
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("check valid spill/fill, ptr to mem")
+__success __success_unpriv __retval(0)
+__naked void spill_fill_ptr_to_mem(void)
+{
+ asm volatile (" \
+ /* reserve 8 byte ringbuf memory */ \
+ r1 = 0; \
+ *(u64*)(r10 - 8) = r1; \
+ r1 = %[map_ringbuf] ll; \
+ r2 = 8; \
+ r3 = 0; \
+ call %[bpf_ringbuf_reserve]; \
+ /* store a pointer to the reserved memory in R6 */\
+ r6 = r0; \
+ /* check whether the reservation was successful */\
+ if r0 == 0 goto l0_%=; \
+ /* spill R6(mem) into the stack */ \
+ *(u64*)(r10 - 8) = r6; \
+ /* fill it back in R7 */ \
+ r7 = *(u64*)(r10 - 8); \
+ /* should be able to access *(R7) = 0 */ \
+ r1 = 0; \
+ *(u64*)(r7 + 0) = r1; \
+ /* submit the reserved ringbuf memory */ \
+ r1 = r7; \
+ r2 = 0; \
+ call %[bpf_ringbuf_submit]; \
+l0_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm(bpf_ringbuf_reserve),
+ __imm(bpf_ringbuf_submit),
+ __imm_addr(map_ringbuf)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("check with invalid reg offset 0")
+__failure __msg("R0 pointer arithmetic on ringbuf_mem_or_null prohibited")
+__failure_unpriv
+__naked void with_invalid_reg_offset_0(void)
+{
+ asm volatile (" \
+ /* reserve 8 byte ringbuf memory */ \
+ r1 = 0; \
+ *(u64*)(r10 - 8) = r1; \
+ r1 = %[map_ringbuf] ll; \
+ r2 = 8; \
+ r3 = 0; \
+ call %[bpf_ringbuf_reserve]; \
+ /* store a pointer to the reserved memory in R6 */\
+ r6 = r0; \
+ /* add invalid offset to memory or NULL */ \
+ r0 += 1; \
+ /* check whether the reservation was successful */\
+ if r0 == 0 goto l0_%=; \
+ /* should not be able to access *(R7) = 0 */ \
+ r1 = 0; \
+ *(u32*)(r6 + 0) = r1; \
+ /* submit the reserved ringbuf memory */ \
+ r1 = r6; \
+ r2 = 0; \
+ call %[bpf_ringbuf_submit]; \
+l0_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm(bpf_ringbuf_reserve),
+ __imm(bpf_ringbuf_submit),
+ __imm_addr(map_ringbuf)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("check corrupted spill/fill")
+__failure __msg("R0 invalid mem access 'scalar'")
+__msg_unpriv("attempt to corrupt spilled")
+__flag(BPF_F_ANY_ALIGNMENT)
+__naked void check_corrupted_spill_fill(void)
+{
+ asm volatile (" \
+ /* spill R1(ctx) into stack */ \
+ *(u64*)(r10 - 8) = r1; \
+ /* mess up with R1 pointer on stack */ \
+ r0 = 0x23; \
+ *(u8*)(r10 - 7) = r0; \
+ /* fill back into R0 is fine for priv. \
+ * R0 now becomes SCALAR_VALUE. \
+ */ \
+ r0 = *(u64*)(r10 - 8); \
+ /* Load from R0 should fail. */ \
+ r0 = *(u64*)(r0 + 8); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("check corrupted spill/fill, LSB")
+__success __failure_unpriv __msg_unpriv("attempt to corrupt spilled")
+__retval(POINTER_VALUE)
+__naked void check_corrupted_spill_fill_lsb(void)
+{
+ asm volatile (" \
+ *(u64*)(r10 - 8) = r1; \
+ r0 = 0xcafe; \
+ *(u16*)(r10 - 8) = r0; \
+ r0 = *(u64*)(r10 - 8); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("check corrupted spill/fill, MSB")
+__success __failure_unpriv __msg_unpriv("attempt to corrupt spilled")
+__retval(POINTER_VALUE)
+__naked void check_corrupted_spill_fill_msb(void)
+{
+ asm volatile (" \
+ *(u64*)(r10 - 8) = r1; \
+ r0 = 0x12345678; \
+ *(u32*)(r10 - 4) = r0; \
+ r0 = *(u64*)(r10 - 8); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("tc")
+__description("Spill and refill a u32 const scalar. Offset to skb->data")
+__success __retval(0)
+__naked void scalar_offset_to_skb_data_1(void)
+{
+ asm volatile (" \
+ r2 = *(u32*)(r1 + %[__sk_buff_data]); \
+ r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
+ w4 = 20; \
+ *(u32*)(r10 - 8) = r4; \
+ r4 = *(u32*)(r10 - 8); \
+ r0 = r2; \
+ /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=20 */ \
+ r0 += r4; \
+ /* if (r0 > r3) R0=pkt,off=20 R2=pkt R3=pkt_end R4=20 */\
+ if r0 > r3 goto l0_%=; \
+ /* r0 = *(u32 *)r2 R0=pkt,off=20,r=20 R2=pkt,r=20 R3=pkt_end R4=20 */\
+ r0 = *(u32*)(r2 + 0); \
+l0_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
+ __imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("Spill a u32 const, refill from another half of the uninit u32 from the stack")
+/* in privileged mode reads from uninitialized stack locations are permitted */
+__success __failure_unpriv
+__msg_unpriv("invalid read from stack off -4+0 size 4")
+__retval(0)
+__naked void uninit_u32_from_the_stack(void)
+{
+ asm volatile (" \
+ w4 = 20; \
+ *(u32*)(r10 - 8) = r4; \
+ /* r4 = *(u32 *)(r10 -4) fp-8=????rrrr*/ \
+ r4 = *(u32*)(r10 - 4); \
+ r0 = 0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("tc")
+__description("Spill a u32 const scalar. Refill as u16. Offset to skb->data")
+__failure __msg("invalid access to packet")
+__naked void u16_offset_to_skb_data(void)
+{
+ asm volatile (" \
+ r2 = *(u32*)(r1 + %[__sk_buff_data]); \
+ r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
+ w4 = 20; \
+ *(u32*)(r10 - 8) = r4; \
+ r4 = *(u16*)(r10 - 8); \
+ r0 = r2; \
+ /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=65535 */\
+ r0 += r4; \
+ /* if (r0 > r3) R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=umax=65535 */\
+ if r0 > r3 goto l0_%=; \
+ /* r0 = *(u32 *)r2 R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=20 */\
+ r0 = *(u32*)(r2 + 0); \
+l0_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
+ __imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
+ : __clobber_all);
+}
+
+SEC("tc")
+__description("Spill u32 const scalars. Refill as u64. Offset to skb->data")
+__failure __msg("invalid access to packet")
+__naked void u64_offset_to_skb_data(void)
+{
+ asm volatile (" \
+ r2 = *(u32*)(r1 + %[__sk_buff_data]); \
+ r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
+ w6 = 0; \
+ w7 = 20; \
+ *(u32*)(r10 - 4) = r6; \
+ *(u32*)(r10 - 8) = r7; \
+ r4 = *(u16*)(r10 - 8); \
+ r0 = r2; \
+ /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=65535 */\
+ r0 += r4; \
+ /* if (r0 > r3) R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=umax=65535 */\
+ if r0 > r3 goto l0_%=; \
+ /* r0 = *(u32 *)r2 R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=20 */\
+ r0 = *(u32*)(r2 + 0); \
+l0_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
+ __imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
+ : __clobber_all);
+}
+
+SEC("tc")
+__description("Spill a u32 const scalar. Refill as u16 from fp-6. Offset to skb->data")
+__failure __msg("invalid access to packet")
+__naked void _6_offset_to_skb_data(void)
+{
+ asm volatile (" \
+ r2 = *(u32*)(r1 + %[__sk_buff_data]); \
+ r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
+ w4 = 20; \
+ *(u32*)(r10 - 8) = r4; \
+ r4 = *(u16*)(r10 - 6); \
+ r0 = r2; \
+ /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=65535 */\
+ r0 += r4; \
+ /* if (r0 > r3) R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=umax=65535 */\
+ if r0 > r3 goto l0_%=; \
+ /* r0 = *(u32 *)r2 R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=20 */\
+ r0 = *(u32*)(r2 + 0); \
+l0_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
+ __imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
+ : __clobber_all);
+}
+
+SEC("tc")
+__description("Spill and refill a u32 const scalar at non 8byte aligned stack addr. Offset to skb->data")
+__failure __msg("invalid access to packet")
+__naked void addr_offset_to_skb_data(void)
+{
+ asm volatile (" \
+ r2 = *(u32*)(r1 + %[__sk_buff_data]); \
+ r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
+ w4 = 20; \
+ *(u32*)(r10 - 8) = r4; \
+ *(u32*)(r10 - 4) = r4; \
+ r4 = *(u32*)(r10 - 4); \
+ r0 = r2; \
+ /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=U32_MAX */\
+ r0 += r4; \
+ /* if (r0 > r3) R0=pkt,umax=U32_MAX R2=pkt R3=pkt_end R4= */\
+ if r0 > r3 goto l0_%=; \
+ /* r0 = *(u32 *)r2 R0=pkt,umax=U32_MAX R2=pkt R3=pkt_end R4= */\
+ r0 = *(u32*)(r2 + 0); \
+l0_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
+ __imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
+ : __clobber_all);
+}
+
+SEC("tc")
+__description("Spill and refill a umax=40 bounded scalar. Offset to skb->data")
+__success __retval(0)
+__naked void scalar_offset_to_skb_data_2(void)
+{
+ asm volatile (" \
+ r2 = *(u32*)(r1 + %[__sk_buff_data]); \
+ r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
+ r4 = *(u64*)(r1 + %[__sk_buff_tstamp]); \
+ if r4 <= 40 goto l0_%=; \
+ r0 = 0; \
+ exit; \
+l0_%=: /* *(u32 *)(r10 -8) = r4 R4=umax=40 */ \
+ *(u32*)(r10 - 8) = r4; \
+ /* r4 = (*u32 *)(r10 - 8) */ \
+ r4 = *(u32*)(r10 - 8); \
+ /* r2 += r4 R2=pkt R4=umax=40 */ \
+ r2 += r4; \
+ /* r0 = r2 R2=pkt,umax=40 R4=umax=40 */ \
+ r0 = r2; \
+ /* r2 += 20 R0=pkt,umax=40 R2=pkt,umax=40 */ \
+ r2 += 20; \
+ /* if (r2 > r3) R0=pkt,umax=40 R2=pkt,off=20,umax=40 */\
+ if r2 > r3 goto l1_%=; \
+ /* r0 = *(u32 *)r0 R0=pkt,r=20,umax=40 R2=pkt,off=20,r=20,umax=40 */\
+ r0 = *(u32*)(r0 + 0); \
+l1_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
+ __imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end)),
+ __imm_const(__sk_buff_tstamp, offsetof(struct __sk_buff, tstamp))
+ : __clobber_all);
+}
+
+SEC("tc")
+__description("Spill a u32 scalar at fp-4 and then at fp-8")
+__success __retval(0)
+__naked void and_then_at_fp_8(void)
+{
+ asm volatile (" \
+ w4 = 4321; \
+ *(u32*)(r10 - 4) = r4; \
+ *(u32*)(r10 - 8) = r4; \
+ r4 = *(u64*)(r10 - 8); \
+ r0 = 0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/verifier/spill_fill.c b/tools/testing/selftests/bpf/verifier/spill_fill.c
deleted file mode 100644
index d1463bf4949a..000000000000
--- a/tools/testing/selftests/bpf/verifier/spill_fill.c
+++ /dev/null
@@ -1,345 +0,0 @@
-{
- "check valid spill/fill",
- .insns = {
- /* spill R1(ctx) into stack */
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
- /* fill it back into R2 */
- BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_10, -8),
- /* should be able to access R0 = *(R2 + 8) */
- /* BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 8), */
- BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
- BPF_EXIT_INSN(),
- },
- .errstr_unpriv = "R0 leaks addr",
- .result = ACCEPT,
- .result_unpriv = REJECT,
- .retval = POINTER_VALUE,
-},
-{
- "check valid spill/fill, skb mark",
- .insns = {
- BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_1),
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -8),
- BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
- BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0,
- offsetof(struct __sk_buff, mark)),
- BPF_EXIT_INSN(),
- },
- .result = ACCEPT,
- .result_unpriv = ACCEPT,
-},
-{
- "check valid spill/fill, ptr to mem",
- .insns = {
- /* reserve 8 byte ringbuf memory */
- BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
- BPF_LD_MAP_FD(BPF_REG_1, 0),
- BPF_MOV64_IMM(BPF_REG_2, 8),
- BPF_MOV64_IMM(BPF_REG_3, 0),
- BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_reserve),
- /* store a pointer to the reserved memory in R6 */
- BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
- /* check whether the reservation was successful */
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 6),
- /* spill R6(mem) into the stack */
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -8),
- /* fill it back in R7 */
- BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_10, -8),
- /* should be able to access *(R7) = 0 */
- BPF_ST_MEM(BPF_DW, BPF_REG_7, 0, 0),
- /* submit the reserved ringbuf memory */
- BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
- BPF_MOV64_IMM(BPF_REG_2, 0),
- BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_submit),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .fixup_map_ringbuf = { 1 },
- .result = ACCEPT,
- .result_unpriv = ACCEPT,
-},
-{
- "check with invalid reg offset 0",
- .insns = {
- /* reserve 8 byte ringbuf memory */
- BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
- BPF_LD_MAP_FD(BPF_REG_1, 0),
- BPF_MOV64_IMM(BPF_REG_2, 8),
- BPF_MOV64_IMM(BPF_REG_3, 0),
- BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_reserve),
- /* store a pointer to the reserved memory in R6 */
- BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
- /* add invalid offset to memory or NULL */
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
- /* check whether the reservation was successful */
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
- /* should not be able to access *(R7) = 0 */
- BPF_ST_MEM(BPF_W, BPF_REG_6, 0, 0),
- /* submit the reserved ringbuf memory */
- BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
- BPF_MOV64_IMM(BPF_REG_2, 0),
- BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_submit),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .fixup_map_ringbuf = { 1 },
- .result = REJECT,
- .errstr = "R0 pointer arithmetic on ringbuf_mem_or_null prohibited",
-},
-{
- "check corrupted spill/fill",
- .insns = {
- /* spill R1(ctx) into stack */
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
- /* mess up with R1 pointer on stack */
- BPF_ST_MEM(BPF_B, BPF_REG_10, -7, 0x23),
- /* fill back into R0 is fine for priv.
- * R0 now becomes SCALAR_VALUE.
- */
- BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
- /* Load from R0 should fail. */
- BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
- BPF_EXIT_INSN(),
- },
- .errstr_unpriv = "attempt to corrupt spilled",
- .errstr = "R0 invalid mem access 'scalar'",
- .result = REJECT,
- .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
-},
-{
- "check corrupted spill/fill, LSB",
- .insns = {
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
- BPF_ST_MEM(BPF_H, BPF_REG_10, -8, 0xcafe),
- BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
- BPF_EXIT_INSN(),
- },
- .errstr_unpriv = "attempt to corrupt spilled",
- .result_unpriv = REJECT,
- .result = ACCEPT,
- .retval = POINTER_VALUE,
-},
-{
- "check corrupted spill/fill, MSB",
- .insns = {
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
- BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0x12345678),
- BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
- BPF_EXIT_INSN(),
- },
- .errstr_unpriv = "attempt to corrupt spilled",
- .result_unpriv = REJECT,
- .result = ACCEPT,
- .retval = POINTER_VALUE,
-},
-{
- "Spill and refill a u32 const scalar. Offset to skb->data",
- .insns = {
- BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
- offsetof(struct __sk_buff, data)),
- BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
- offsetof(struct __sk_buff, data_end)),
- /* r4 = 20 */
- BPF_MOV32_IMM(BPF_REG_4, 20),
- /* *(u32 *)(r10 -8) = r4 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_4, -8),
- /* r4 = *(u32 *)(r10 -8) */
- BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_10, -8),
- /* r0 = r2 */
- BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
- /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=20 */
- BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_4),
- /* if (r0 > r3) R0=pkt,off=20 R2=pkt R3=pkt_end R4=20 */
- BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
- /* r0 = *(u32 *)r2 R0=pkt,off=20,r=20 R2=pkt,r=20 R3=pkt_end R4=20 */
- BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_2, 0),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .result = ACCEPT,
- .prog_type = BPF_PROG_TYPE_SCHED_CLS,
-},
-{
- "Spill a u32 const, refill from another half of the uninit u32 from the stack",
- .insns = {
- /* r4 = 20 */
- BPF_MOV32_IMM(BPF_REG_4, 20),
- /* *(u32 *)(r10 -8) = r4 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_4, -8),
- /* r4 = *(u32 *)(r10 -4) fp-8=????rrrr*/
- BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_10, -4),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .result_unpriv = REJECT,
- .errstr_unpriv = "invalid read from stack off -4+0 size 4",
- /* in privileged mode reads from uninitialized stack locations are permitted */
- .result = ACCEPT,
-},
-{
- "Spill a u32 const scalar. Refill as u16. Offset to skb->data",
- .insns = {
- BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
- offsetof(struct __sk_buff, data)),
- BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
- offsetof(struct __sk_buff, data_end)),
- /* r4 = 20 */
- BPF_MOV32_IMM(BPF_REG_4, 20),
- /* *(u32 *)(r10 -8) = r4 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_4, -8),
- /* r4 = *(u16 *)(r10 -8) */
- BPF_LDX_MEM(BPF_H, BPF_REG_4, BPF_REG_10, -8),
- /* r0 = r2 */
- BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
- /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=65535 */
- BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_4),
- /* if (r0 > r3) R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=umax=65535 */
- BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
- /* r0 = *(u32 *)r2 R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=20 */
- BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_2, 0),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .result = REJECT,
- .errstr = "invalid access to packet",
- .prog_type = BPF_PROG_TYPE_SCHED_CLS,
-},
-{
- "Spill u32 const scalars. Refill as u64. Offset to skb->data",
- .insns = {
- BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
- offsetof(struct __sk_buff, data)),
- BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
- offsetof(struct __sk_buff, data_end)),
- /* r6 = 0 */
- BPF_MOV32_IMM(BPF_REG_6, 0),
- /* r7 = 20 */
- BPF_MOV32_IMM(BPF_REG_7, 20),
- /* *(u32 *)(r10 -4) = r6 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_6, -4),
- /* *(u32 *)(r10 -8) = r7 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_7, -8),
- /* r4 = *(u64 *)(r10 -8) */
- BPF_LDX_MEM(BPF_H, BPF_REG_4, BPF_REG_10, -8),
- /* r0 = r2 */
- BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
- /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=65535 */
- BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_4),
- /* if (r0 > r3) R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=umax=65535 */
- BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
- /* r0 = *(u32 *)r2 R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=20 */
- BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_2, 0),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .result = REJECT,
- .errstr = "invalid access to packet",
- .prog_type = BPF_PROG_TYPE_SCHED_CLS,
-},
-{
- "Spill a u32 const scalar. Refill as u16 from fp-6. Offset to skb->data",
- .insns = {
- BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
- offsetof(struct __sk_buff, data)),
- BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
- offsetof(struct __sk_buff, data_end)),
- /* r4 = 20 */
- BPF_MOV32_IMM(BPF_REG_4, 20),
- /* *(u32 *)(r10 -8) = r4 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_4, -8),
- /* r4 = *(u16 *)(r10 -6) */
- BPF_LDX_MEM(BPF_H, BPF_REG_4, BPF_REG_10, -6),
- /* r0 = r2 */
- BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
- /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=65535 */
- BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_4),
- /* if (r0 > r3) R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=umax=65535 */
- BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
- /* r0 = *(u32 *)r2 R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=20 */
- BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_2, 0),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .result = REJECT,
- .errstr = "invalid access to packet",
- .prog_type = BPF_PROG_TYPE_SCHED_CLS,
-},
-{
- "Spill and refill a u32 const scalar at non 8byte aligned stack addr. Offset to skb->data",
- .insns = {
- BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
- offsetof(struct __sk_buff, data)),
- BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
- offsetof(struct __sk_buff, data_end)),
- /* r4 = 20 */
- BPF_MOV32_IMM(BPF_REG_4, 20),
- /* *(u32 *)(r10 -8) = r4 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_4, -8),
- /* *(u32 *)(r10 -4) = r4 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_4, -4),
- /* r4 = *(u32 *)(r10 -4), */
- BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_10, -4),
- /* r0 = r2 */
- BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
- /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=U32_MAX */
- BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_4),
- /* if (r0 > r3) R0=pkt,umax=U32_MAX R2=pkt R3=pkt_end R4= */
- BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
- /* r0 = *(u32 *)r2 R0=pkt,umax=U32_MAX R2=pkt R3=pkt_end R4= */
- BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_2, 0),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .result = REJECT,
- .errstr = "invalid access to packet",
- .prog_type = BPF_PROG_TYPE_SCHED_CLS,
-},
-{
- "Spill and refill a umax=40 bounded scalar. Offset to skb->data",
- .insns = {
- BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
- offsetof(struct __sk_buff, data)),
- BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
- offsetof(struct __sk_buff, data_end)),
- BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_1,
- offsetof(struct __sk_buff, tstamp)),
- BPF_JMP_IMM(BPF_JLE, BPF_REG_4, 40, 2),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- /* *(u32 *)(r10 -8) = r4 R4=umax=40 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_4, -8),
- /* r4 = (*u32 *)(r10 - 8) */
- BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_10, -8),
- /* r2 += r4 R2=pkt R4=umax=40 */
- BPF_ALU64_REG(BPF_ADD, BPF_REG_2, BPF_REG_4),
- /* r0 = r2 R2=pkt,umax=40 R4=umax=40 */
- BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
- /* r2 += 20 R0=pkt,umax=40 R2=pkt,umax=40 */
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 20),
- /* if (r2 > r3) R0=pkt,umax=40 R2=pkt,off=20,umax=40 */
- BPF_JMP_REG(BPF_JGT, BPF_REG_2, BPF_REG_3, 1),
- /* r0 = *(u32 *)r0 R0=pkt,r=20,umax=40 R2=pkt,off=20,r=20,umax=40 */
- BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0, 0),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .result = ACCEPT,
- .prog_type = BPF_PROG_TYPE_SCHED_CLS,
-},
-{
- "Spill a u32 scalar at fp-4 and then at fp-8",
- .insns = {
- /* r4 = 4321 */
- BPF_MOV32_IMM(BPF_REG_4, 4321),
- /* *(u32 *)(r10 -4) = r4 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_4, -4),
- /* *(u32 *)(r10 -8) = r4 */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_4, -8),
- /* r4 = *(u64 *)(r10 -8) */
- BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .result = ACCEPT,
- .prog_type = BPF_PROG_TYPE_SCHED_CLS,
-},
--
2.40.0
