6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Cheng Lin <cheng.lin130@xxxxxxxxxx>
[ Upstream commit 2b99e410b28f5a75ae417e6389e767c7745d6fce ]
When abnormal drop_nlink are detected on the inode,
return error, to avoid corruption propagation.
Signed-off-by: Cheng Lin <cheng.lin130@xxxxxxxxxx>
Reviewed-by: "Darrick J. Wong" <djwong@xxxxxxxxxx>
Signed-off-by: Chandan Babu R <chandanbabu@xxxxxxxxxx>
Signed-off-by: Leah Rumancik <leah.rumancik@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/xfs/xfs_inode.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -919,6 +919,13 @@ xfs_droplink(
xfs_trans_t *tp,
xfs_inode_t *ip)
{
+ if (VFS_I(ip)->i_nlink == 0) {
+ xfs_alert(ip->i_mount,
+ "%s: Attempt to drop inode (%llu) with nlink zero.",
+ __func__, ip->i_ino);
+ return -EFSCORRUPTED;
+ }
+
xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
drop_nlink(VFS_I(ip));
