ovl: dilute permission checks on lower only if not special file

[cascardo/linux.git] / fs / overlayfs / inode.c

diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index f7caf16..76cfe9d 100644 (file)
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -137,7 +137,7 @@ int ovl_permission(struct inode *inode, int mask)
                return err;
 
        old_cred = ovl_override_creds(inode->i_sb);
-       if (!is_upper)
+       if (!is_upper && !special_file(realinode->i_mode))
                mask &= ~(MAY_WRITE | MAY_APPEND);
        err = inode_permission(realinode, mask);
        revert_creds(old_cred);