selftest/mm: remove seal_elf

Remove seal_elf, which is a demo of mseal, we no longer need this.

Link: https://lkml.kernel.org/r/20241116005058.69091-1-jeffxu@chromium.org
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/tools/testing/selftests/mm/.gitignore b/tools/testing/selftests/mm/.gitignore
index 085b06750bf483661644b3dbe19a6ad854597207..a51a947b2d1db37b1634c8d2acccbee229d714cb 100644 (file)
--- a/tools/testing/selftests/mm/.gitignore
+++ b/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

diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile
index 3de23ea4663f79fb127e10e9c2d2660a5cff65df..f2db43c64f833cc4c6cb50c92ff973365622804e 100644 (file)
--- a/tools/testing/selftests/mm/Makefile
+++ b/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 b/tools/testing/selftests/mm/seal_elf.c
deleted file mode 100644 (file)
index d9f8ba8..0000000
--- 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();
-}