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udf: Skip parent dir link count update if corrupted

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BugLink: https://bugs.launchpad.net/bugs/2103869

[ 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@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Jan Kara
2024-11-26 12:46:00 +01:00
committed by Mehmet Basaran
parent 782d207927
commit 8c65a36401
1 changed files with 5 additions and 1 deletions
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fs/udf/namei.c
+5 -1
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@@ -517,7 +517,11 @@ 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);
inode_set_mtime_to_ts(dir,
inode_set_ctime_to_ts(dir, inode_set_ctime_current(inode)));