Like inode events, FAN_FS_ERROR will require fid mode. Therefore,
convert the verification during fanotify_mark(2) to require fid for any
non-fd event. This means fid_mode will not only be required for inode
events, but for any event that doesn't provide a descriptor.
Suggested-by: Amir Goldstein <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Reviewed-by: Amir Goldstein <[email protected]>
Signed-off-by: Gabriel Krisman Bertazi <[email protected]>
---
changes since v5:
- Fix condition to include FANOTIFY_EVENT_FLAGS. (me)
- Fix comment identation (jan)
---
fs/notify/fanotify/fanotify_user.c | 12 ++++++------
include/linux/fanotify.h | 3 +++
2 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index adeae6d65e35..66ee3c2805c7 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -1458,14 +1458,14 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
goto fput_and_out;
/*
- * Events with data type inode do not carry enough information to report
- * event->fd, so we do not allow setting a mask for inode events unless
- * group supports reporting fid.
- * inode events are not supported on a mount mark, because they do not
- * carry enough information (i.e. path) to be filtered by mount point.
+ * Events that do not carry enough information to report
+ * event->fd require a group that supports reporting fid. Those
+ * events are not supported on a mount mark, because they do not
+ * carry enough information (i.e. path) to be filtered by mount
+ * point.
*/
fid_mode = FAN_GROUP_FLAG(group, FANOTIFY_FID_BITS);
- if (mask & FANOTIFY_INODE_EVENTS &&
+ if (mask & ~(FANOTIFY_FD_EVENTS|FANOTIFY_EVENT_FLAGS) &&
(!fid_mode || mark_type == FAN_MARK_MOUNT))
goto fput_and_out;
diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
index eec3b7c40811..52d464802d99 100644
--- a/include/linux/fanotify.h
+++ b/include/linux/fanotify.h
@@ -84,6 +84,9 @@ extern struct ctl_table fanotify_table[]; /* for sysctl */
*/
#define FANOTIFY_DIRENT_EVENTS (FAN_MOVE | FAN_CREATE | FAN_DELETE)
+/* Events that can be reported with event->fd */
+#define FANOTIFY_FD_EVENTS (FANOTIFY_PATH_EVENTS | FANOTIFY_PERM_EVENTS)
+
/* Events that can only be reported with data type FSNOTIFY_EVENT_INODE */
#define FANOTIFY_INODE_EVENTS (FANOTIFY_DIRENT_EVENTS | \
FAN_ATTRIB | FAN_MOVE_SELF | FAN_DELETE_SELF)
--
2.33.0