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Merge pull request #10952 from evverx/keep-fuzz-udev-rules-going

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tests: make fuzz-udev-rules work also in the environment created by run_minijail
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Yu Watanabe 2018-11-28 11:33:27 +09:00 committed by GitHub
commit 466a2bee94
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 28 additions and 16 deletions
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44
src/fuzz/fuzz-udev-rules.c
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@ -16,15 +16,16 @@
#include "tests.h"
#include "udev.h"
static const struct fakefs {
static struct fakefs {
const char *target;
bool ignore_mount_error;
bool is_mounted;
} fakefss[] = {
{ "/sys", false },
{ "/dev", false },
{ "/run", false },
{ "/etc", false },
{ UDEVLIBEXECDIR "/rules.d", true },
{ "/sys", false, false },
{ "/dev", false, false },
{ "/run", false, false },
{ "/etc", false, false },
{ UDEVLIBEXECDIR "/rules.d", true, false },
};
static int setup_mount_namespace(void) {
@ -45,23 +46,30 @@ static int setup_mount_namespace(void) {
}
static int setup_fake_filesystems(const char *runtime_dir) {
for (unsigned i = 0; i < ELEMENTSOF(fakefss); i++)
for (unsigned i = 0; i < ELEMENTSOF(fakefss); i++) {
if (mount(runtime_dir, fakefss[i].target, NULL, MS_BIND, NULL) < 0) {
log_full_errno(fakefss[i].ignore_mount_error ? LOG_DEBUG : LOG_ERR, errno, "Failed to mount %s: %m", fakefss[i].target);
if (!fakefss[i].ignore_mount_error)
return -errno;
}
} else
fakefss[i].is_mounted = true;
}
return 0;
}
static int cleanup_fake_filesystems(const char *runtime_dir) {
for (unsigned i = 0; i < ELEMENTSOF(fakefss); i++)
for (unsigned i = 0; i < ELEMENTSOF(fakefss); i++) {
if (!fakefss[i].is_mounted)
continue;
if (umount(fakefss[i].target) < 0) {
log_full_errno(fakefss[i].ignore_mount_error ? LOG_DEBUG : LOG_ERR, errno, "Failed to umount %s: %m", fakefss[i].target);
if (!fakefss[i].ignore_mount_error)
return -errno;
}
} else
fakefss[i].is_mounted = false;
}
return 0;
}
@ -70,17 +78,21 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
_cleanup_(rm_rf_physical_and_freep) char *runtime_dir = NULL;
FILE *f = NULL;
(void) setup_mount_namespace();
assert_se(runtime_dir = setup_fake_runtime_dir());
if (setup_fake_filesystems(runtime_dir) < 0) {
#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
return EXIT_TEST_SKIP;
#endif
}
if (!getenv("SYSTEMD_LOG_LEVEL")) {
log_set_max_level_realm(LOG_REALM_UDEV, LOG_CRIT);
log_set_max_level_realm(LOG_REALM_SYSTEMD, LOG_CRIT);
}
if (setup_mount_namespace() < 0)
return EXIT_TEST_SKIP;
assert_se(runtime_dir = setup_fake_runtime_dir());
assert_se(setup_fake_filesystems(runtime_dir) >= 0);
assert_se(mkdir_p("/etc/udev/rules.d", 0755) >= 0);
f = fopen("/etc/udev/rules.d/fuzz.rules", "we");
assert_se(f);