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test-seccomp: Handle environment where sync() is already suppressed

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We might be running in an nspawn container booted with --suppress-sync,
so make sure we handle that scenario gracefully.

(cherry picked from commit 31441cb782)
(cherry picked from commit 4f974b5492)
This commit is contained in:
Daan De Meyer
2026-04-05 21:29:31 +02:00
committed by Luca Boccassi
parent db2ae46225
commit 6c2be56375
1 changed files with 13 additions and 10 deletions
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23
src/test/test-seccomp.c
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@@ -1095,20 +1095,23 @@ static void test_seccomp_suppress_sync_child(void) {
_cleanup_close_ int fd = -EBADF;
ASSERT_OK(tempfn_random("/tmp/seccomp_suppress_sync", NULL, &path));
ASSERT_OK_ERRNO(fd = open(path, O_RDWR | O_CREAT | O_SYNC | O_CLOEXEC, 0666));
fd = safe_close(fd);
fd = open(path, O_RDWR | O_CREAT | O_SYNC | O_CLOEXEC, 0666);
/* We might be running in an environment where sync() is already suppressed. */
if (fd >= 0) {
ASSERT_ERROR_ERRNO(fdatasync(-1), EBADF);
ASSERT_ERROR_ERRNO(fsync(-1), EBADF);
ASSERT_ERROR_ERRNO(syncfs(-1), EBADF);
ASSERT_ERROR_ERRNO(fdatasync(-1), EBADF);
ASSERT_ERROR_ERRNO(fsync(-1), EBADF);
ASSERT_ERROR_ERRNO(syncfs(-1), EBADF);
ASSERT_ERROR_ERRNO(fdatasync(INT_MAX), EBADF);
ASSERT_ERROR_ERRNO(fsync(INT_MAX), EBADF);
ASSERT_ERROR_ERRNO(syncfs(INT_MAX), EBADF);
ASSERT_ERROR_ERRNO(fdatasync(INT_MAX), EBADF);
ASSERT_ERROR_ERRNO(fsync(INT_MAX), EBADF);
ASSERT_ERROR_ERRNO(syncfs(INT_MAX), EBADF);
} else if (errno != EINVAL)
ASSERT_OK_ERRNO(fd);
ASSERT_OK(seccomp_suppress_sync());
ASSERT_ERROR_ERRNO(fd = open(path, O_RDWR | O_CREAT | O_SYNC | O_CLOEXEC, 0666), EINVAL);
fd = safe_close(fd);
fd = ASSERT_ERROR_ERRNO(open(path, O_RDWR | O_CREAT | O_SYNC | O_CLOEXEC, 0666), EINVAL);
ASSERT_OK_ERRNO(fdatasync(INT_MAX));
ASSERT_OK_ERRNO(fsync(INT_MAX));