6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jan Kara jack@suse.cz
[ 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 --- fs/udf/namei.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
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));