From: Amir Goldstein amir73il@gmail.com
[ Upstream commit 9991bb84b27a2594187898f261866cfc50255454 ]
When creating an FS_MODIFY event on inode itself (not on parent) the file_name argument should be NULL.
The change to send a non NULL name to inode itself was done on purpuse as part of another commit, as Tejun writes: "...While at it, supply the target file name to fsnotify() from kernfs_node->name.".
But this is wrong practice and inconsistent with inotify behavior when watching a single file. When a child is being watched (as opposed to the parent directory) the inotify event should contain the watch descriptor, but not the file name.
Fixes: df6a58c5c5aa ("kernfs: don't depend on d_find_any_alias()...") Link: https://lore.kernel.org/r/20200708111156.24659-5-amir73il@gmail.com Acked-by: Tejun Heo tj@kernel.org Acked-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Amir Goldstein amir73il@gmail.com Signed-off-by: Jan Kara jack@suse.cz Signed-off-by: Sasha Levin sashal@kernel.org --- fs/kernfs/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index 34366db3620d6..2a1879a6e7957 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -912,7 +912,7 @@ static void kernfs_notify_workfn(struct work_struct *work) }
fsnotify(inode, FS_MODIFY, inode, FSNOTIFY_EVENT_INODE, - &name, 0); + NULL, 0); iput(inode); }