v3.19.8-ckt17 -stable review patch. If anyone has any objections, please let
me know.
---8<------------------------------------------------------------
From: Konstantin Khlebnikov <koc...@gmail.com>
commit b81de061fa59f17d2730aabb1b84419ef3913810 upstream.
Overlayfs must update uid/gid after chown, otherwise functions
like inode_owner_or_capable() will check user against stale uid.
Catched by xfstests generic/087, it chowns file and calls utimes.
Signed-off-by: Konstantin Khlebnikov <koc...@gmail.com>
Signed-off-by: Miklos Szeredi <mik...@szeredi.hu>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
fs/overlayfs/inode.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 8525e67..e7a505c 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -55,6 +55,8 @@ int ovl_setattr(struct dentry *dentry, struct iattr *attr)
mutex_lock(&upperdentry->d_inode->i_mutex);
err = notify_change(upperdentry, attr, NULL);
+ if (!err)
+ ovl_copyattr(upperdentry->d_inode, dentry->d_inode);
mutex_unlock(&upperdentry->d_inode->i_mutex);
}
ovl_drop_write(dentry);
--
2.7.0
