On Tue, Mar 07, 2023 at 06:02:02PM +0100, Greg Kroah-Hartman wrote:
> From: Jan Kara <jack@xxxxxxx>
>
> commit 0813299c586b175d7edb25f56412c54b812d0379 upstream.
>
> When we are renaming a directory to a different directory, we need to
> update '..' entry in the moved directory. However nothing prevents moved
> directory from being modified and even converted from the inline format
> to the normal format. When such race happens the rename code gets
> confused and we crash. Fix the problem by locking the moved directory.
>
> CC: stable@xxxxxxxxxxxxxxx
> Fixes: 32f7f22c0b52 ("ext4: let ext4_rename handle inline dir")
> Signed-off-by: Jan Kara <jack@xxxxxxx>
> Link: https://lore.kernel.org/r/20230126112221.11866-1-jack@xxxxxxx
> Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
This commit has a reported regression
(https://lore.kernel.org/linux-ext4/5efbe1b9-ad8b-4a4f-b422-24824d2b775c@kili.mountain),
so probably it should not be backported quite yet.
- Eric
