4.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Amir Goldstein <amir73il@xxxxxxxxx>
commit 9f99e50d460ac7fd5f6c9b97aad0088c28c8656d upstream.
For broken hardlinks, we do not return lower st_ino, so we should
also not return lower pseudo st_dev.
Fixes: a0c5ad307ac0 ("ovl: relax same fs constraint for constant st_ino")
Cc: <stable@xxxxxxxxxxxxxxx> #v4.15
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/overlayfs/inode.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -110,13 +110,10 @@ int ovl_getattr(const struct path *path,
* that the upper hardlink is not broken.
*/
if (is_dir || lowerstat.nlink == 1 ||
- ovl_test_flag(OVL_INDEX, d_inode(dentry)))
+ ovl_test_flag(OVL_INDEX, d_inode(dentry))) {
stat->ino = lowerstat.ino;
-
- if (samefs)
- WARN_ON_ONCE(stat->dev != lowerstat.dev);
- else
stat->dev = ovl_get_pseudo_dev(dentry);
+ }
}
if (samefs) {
/*