4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vivek Goyal <vgoyal@xxxxxxxxxx> commit 07a2daab49c549a37b5b744cbebb6e3f445f12bc upstream. Right now when a new overlay inode is created, we initialize overlay inode's ->i_mode from underlying inode ->i_mode but we retain only file type bits (S_IFMT) and discard permission bits. This patch changes it and retains permission bits too. This should allow overlay to do permission checks on overlay inode itself in task context. [SzM] It also fixes clearing suid/sgid bits on write. Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx> Reported-by: Eryu Guan <eguan@xxxxxxxxxx> Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx> Fixes: 4bacc9c9234c ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay") Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/overlayfs/inode.c | 3 +-- fs/overlayfs/overlayfs.h | 1 + 2 files changed, 2 insertions(+), 2 deletions(-) --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -412,12 +412,11 @@ struct inode *ovl_new_inode(struct super if (!inode) return NULL; - mode &= S_IFMT; - inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_flags |= S_NOATIME | S_NOCMTIME; + mode &= S_IFMT; switch (mode) { case S_IFDIR: inode->i_private = oe; --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -181,6 +181,7 @@ static inline void ovl_copyattr(struct i { to->i_uid = from->i_uid; to->i_gid = from->i_gid; + to->i_mode = from->i_mode; } /* dir.c */ -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html