This is a note to let you know that I've just added the patch titled
udf: Skip parent dir link count update if corrupted
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
udf-skip-parent-dir-link-count-update-if-corrupted.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5f5434426d4e1e3e3017bd83f1e0574519d4ae9d
Author: Jan Kara <jack@xxxxxxx>
Date: Tue Nov 26 12:46:00 2024 +0100
udf: Skip parent dir link count update if corrupted
[ Upstream commit c5566903af56dd1abb092f18dcb0c770d6cd8dcb ]
If the parent directory link count is too low (likely directory inode
corruption), just skip updating its link count as if it goes to 0 too
early it can cause unexpected issues.
Signed-off-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 605f182da42c..b3f57ad2b869 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -521,7 +521,11 @@ static int udf_rmdir(struct inode *dir, struct dentry *dentry)
inode->i_nlink);
clear_nlink(inode);
inode->i_size = 0;
- inode_dec_link_count(dir);
+ if (dir->i_nlink >= 3)
+ inode_dec_link_count(dir);
+ else
+ udf_warn(inode->i_sb, "parent dir link count too low (%u)\n",
+ dir->i_nlink);
udf_add_fid_counter(dir->i_sb, true, -1);
dir->i_mtime = inode_set_ctime_to_ts(dir,
inode_set_ctime_current(inode));
