The patch titled
Subject: selftest/mm: remove seal_elf
has been added to the -mm mm-unstable branch. Its filename is
selftest-mm-remove-seal_elf.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftest-mm-remove-seal_elf.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Jeff Xu <jeffxu@xxxxxxxxxxxx>
Subject: selftest/mm: remove seal_elf
Date: Sat, 16 Nov 2024 00:50:58 +0000
Remove seal_elf, which is a demo of mseal, we no longer need this.
Link: https://lkml.kernel.org/r/20241116005058.69091-1-jeffxu@xxxxxxxxxxxx
Signed-off-by: Jeff Xu <jeffxu@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/.gitignore | 1
tools/testing/selftests/mm/Makefile | 1
tools/testing/selftests/mm/seal_elf.c | 137 ------------------------
3 files changed, 139 deletions(-)
--- a/tools/testing/selftests/mm/.gitignore~selftest-mm-remove-seal_elf
+++ a/tools/testing/selftests/mm/.gitignore
@@ -52,7 +52,6 @@ va_high_addr_switch
hugetlb_fault_after_madv
hugetlb_madv_vs_map
mseal_test
-seal_elf
droppable
hugetlb_dio
pkey_sighandler_tests_32
--- a/tools/testing/selftests/mm/Makefile~selftest-mm-remove-seal_elf
+++ a/tools/testing/selftests/mm/Makefile
@@ -75,7 +75,6 @@ TEST_GEN_FILES += mrelease_test
TEST_GEN_FILES += mremap_dontunmap
TEST_GEN_FILES += mremap_test
TEST_GEN_FILES += mseal_test
-TEST_GEN_FILES += seal_elf
TEST_GEN_FILES += on-fault-limit
TEST_GEN_FILES += pagemap_ioctl
TEST_GEN_FILES += thuge-gen
diff --git a/tools/testing/selftests/mm/seal_elf.c a/tools/testing/selftests/mm/seal_elf.c
deleted file mode 100644
--- a/tools/testing/selftests/mm/seal_elf.c
+++ /dev/null
@@ -1,137 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-#include <sys/mman.h>
-#include <stdint.h>
-#include <asm-generic/unistd.h>
-#include <string.h>
-#include <sys/time.h>
-#include <sys/resource.h>
-#include <stdbool.h>
-#include "../kselftest.h"
-#include <syscall.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/vfs.h>
-#include <sys/stat.h>
-#include "mseal_helpers.h"
-
-/*
- * define sys_xyx to call syscall directly.
- */
-static int sys_mseal(void *start, size_t len)
-{
- int sret;
-
- errno = 0;
- sret = syscall(__NR_mseal, start, len, 0);
- return sret;
-}
-
-static inline int sys_mprotect(void *ptr, size_t size, unsigned long prot)
-{
- int sret;
-
- errno = 0;
- sret = syscall(__NR_mprotect, ptr, size, prot);
- return sret;
-}
-
-static bool seal_support(void)
-{
- int ret;
- void *ptr;
- unsigned long page_size = getpagesize();
-
- ptr = mmap(NULL, page_size, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
- if (ptr == (void *) -1)
- return false;
-
- ret = sys_mseal(ptr, page_size);
- if (ret < 0)
- return false;
-
- return true;
-}
-
-const char somestr[4096] = {"READONLY"};
-
-static void test_seal_elf(void)
-{
- int ret;
- FILE *maps;
- char line[512];
- uintptr_t addr_start, addr_end;
- char prot[5];
- char filename[256];
- unsigned long page_size = getpagesize();
- unsigned long long ptr = (unsigned long long) somestr;
- char *somestr2 = (char *)somestr;
-
- /*
- * Modify the protection of readonly somestr
- */
- if (((unsigned long long)ptr % page_size) != 0)
- ptr = (unsigned long long)ptr & ~(page_size - 1);
-
- ksft_print_msg("somestr = %s\n", somestr);
- ksft_print_msg("change protection to rw\n");
- ret = sys_mprotect((void *)ptr, page_size, PROT_READ|PROT_WRITE);
- FAIL_TEST_IF_FALSE(!ret);
- *somestr2 = 'A';
- ksft_print_msg("somestr is modified to: %s\n", somestr);
- ret = sys_mprotect((void *)ptr, page_size, PROT_READ);
- FAIL_TEST_IF_FALSE(!ret);
-
- maps = fopen("/proc/self/maps", "r");
- FAIL_TEST_IF_FALSE(maps);
-
- /*
- * apply sealing to elf binary
- */
- while (fgets(line, sizeof(line), maps)) {
- if (sscanf(line, "%lx-%lx %4s %*x %*x:%*x %*u %255[^\n]",
- &addr_start, &addr_end, prot, filename) == 4) {
- if (strlen(filename)) {
- /*
- * seal the mapping if read only.
- */
- if (strstr(prot, "r-")) {
- ret = sys_mseal((void *)addr_start, addr_end - addr_start);
- FAIL_TEST_IF_FALSE(!ret);
- ksft_print_msg("sealed: %lx-%lx %s %s\n",
- addr_start, addr_end, prot, filename);
- if ((uintptr_t) somestr >= addr_start &&
- (uintptr_t) somestr <= addr_end)
- ksft_print_msg("mapping for somestr found\n");
- }
- }
- }
- }
- fclose(maps);
-
- ret = sys_mprotect((void *)ptr, page_size, PROT_READ | PROT_WRITE);
- FAIL_TEST_IF_FALSE(ret < 0);
- ksft_print_msg("somestr is sealed, mprotect is rejected\n");
-
- REPORT_TEST_PASS();
-}
-
-int main(int argc, char **argv)
-{
- bool test_seal = seal_support();
-
- ksft_print_header();
- ksft_print_msg("pid=%d\n", getpid());
-
- if (!test_seal)
- ksft_exit_skip("sealing not supported, check CONFIG_64BIT\n");
-
- ksft_set_plan(1);
-
- test_seal_elf();
-
- ksft_finished();
-}
_
Patches currently in -mm which might be from jeffxu@xxxxxxxxxxxx are
selftest-mm-remove-seal_elf.patch
