On Tue, Oct 26, 2021 at 9:44 PM Gabriel Krisman Bertazi
<krisman@xxxxxxxxxxxxx> wrote:
>
> This test corrupts an inode entry with an invalid mode through debugfs
> and then tries to access it. This should result in a ext4 error, which
> we monitor through the fanotify group.
>
> Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
Reviewed-by: Amir Goldstein <amir73il@xxxxxxxxx>
> ---
> .../kernel/syscalls/fanotify/fanotify20.c | 22 +++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
> diff --git a/testcases/kernel/syscalls/fanotify/fanotify20.c b/testcases/kernel/syscalls/fanotify/fanotify20.c
> index 5c5ee3c6fb74..7bcddcaa98cb 100644
> --- a/testcases/kernel/syscalls/fanotify/fanotify20.c
> +++ b/testcases/kernel/syscalls/fanotify/fanotify20.c
> @@ -38,6 +38,10 @@
> #define FILEID_INVALID 0xff
> #endif
>
> +#ifndef EFSCORRUPTED
> +#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
> +#endif
> +
> #define BUF_SIZE 256
> static char event_buf[BUF_SIZE];
> int fd_notify;
> @@ -63,6 +67,17 @@ static void trigger_fs_abort(void)
> MS_REMOUNT|MS_RDONLY, "abort");
> }
>
> +static void tcase2_trigger_lookup(void)
> +{
> + int ret;
> +
> + /* SAFE_OPEN cannot be used here because we expect it to fail. */
> + ret = open(MOUNT_PATH"/"BAD_DIR, O_RDONLY, 0);
> + if (ret != -1 && errno != EUCLEAN)
> + tst_res(TFAIL, "Unexpected lookup result(%d) of %s (%d!=%d)",
> + ret, BAD_DIR, errno, EUCLEAN);
> +}
> +
> static struct test_case {
> char *name;
> int error;
> @@ -77,6 +92,13 @@ static struct test_case {
> .error = ESHUTDOWN,
> .fid = &null_fid,
> },
> + {
> + .name = "Lookup of inode with invalid mode",
> + .trigger_error = &tcase2_trigger_lookup,
> + .error_count = 1,
> + .error = EFSCORRUPTED,
> + .fid = &bad_file_fid,
> + },
> };
>
> int check_error_event_info_fid(struct fanotify_event_info_fid *fid,
> --
> 2.33.0
>
