[PATCH v3 7/9] syscalls/fanotify21: Create a corrupted file
From: Gabriel Krisman Bertazi <hidden>
Date: 2021-10-29 21:18:38
Also in:
ltp
Subsystem:
the rest · Maintainer:
Linus Torvalds
Allocate a test directory and corrupt it with debugfs. The corruption is done by writing an invalid inode mode. This file can be later looked up to trigger a corruption error. Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Gabriel Krisman Bertazi <redacted> --- testcases/kernel/syscalls/fanotify/fanotify21.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/testcases/kernel/syscalls/fanotify/fanotify21.c b/testcases/kernel/syscalls/fanotify/fanotify21.c
index 43e606c27372..3e4ac2eb2e5b 100644
--- a/testcases/kernel/syscalls/fanotify/fanotify21.c
+++ b/testcases/kernel/syscalls/fanotify/fanotify21.c@@ -39,9 +39,12 @@ static char event_buf[BUF_SIZE]; int fd_notify; #define MOUNT_PATH "test_mnt" +#define BASE_DIR "internal_dir" +#define BAD_DIR BASE_DIR"/bad_dir" /* These expected FIDs are common to multiple tests */ static struct fanotify_fid_t null_fid; +static struct fanotify_fid_t bad_file_fid; static void trigger_fs_abort(void) {
@@ -197,6 +200,18 @@ static void do_test(unsigned int i) check_event(event_buf, read_len, tcase); } +static void pre_corrupt_fs(void) +{ + SAFE_MKDIR(MOUNT_PATH"/"BASE_DIR, 0777); + SAFE_MKDIR(MOUNT_PATH"/"BAD_DIR, 0777); + + fanotify_save_fid(MOUNT_PATH"/"BAD_DIR, &bad_file_fid); + + SAFE_UMOUNT(MOUNT_PATH); + do_debugfs_request(tst_device->dev, "sif " BAD_DIR " mode 0xff"); + SAFE_MOUNT(tst_device->dev, MOUNT_PATH, tst_device->fs_type, 0, NULL); +} + static void init_null_fid(void) { /* Use fanotify_save_fid to fill the fsid and overwrite the
@@ -216,6 +231,8 @@ static void setup(void) init_null_fid(); + pre_corrupt_fs(); + fd_notify = SAFE_FANOTIFY_INIT(FAN_CLASS_NOTIF|FAN_REPORT_FID, O_RDONLY); }
--
2.33.0