diff options
| -rw-r--r-- | fs/overlayfs/inode.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index bfe7ee0aa51f..123ce07cdc77 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -280,12 +280,14 @@ int ovl_permission(struct user_namespace *mnt_userns, struct inode *inode, int mask) { struct inode *upperinode = ovl_inode_upper(inode); - struct inode *realinode = upperinode ?: ovl_inode_lower(inode); + struct inode *realinode; + struct path realpath; const struct cred *old_cred; int err; /* Careful in RCU walk mode */ - if (!realinode) { + ovl_i_path_real(inode, &realpath); + if (!realpath.dentry) { WARN_ON(!(mask & MAY_NOT_BLOCK)); return -ECHILD; } @@ -298,6 +300,7 @@ int ovl_permission(struct user_namespace *mnt_userns, if (err) return err; + realinode = d_inode(realpath.dentry); old_cred = ovl_override_creds(inode->i_sb); if (!upperinode && !special_file(realinode->i_mode) && mask & MAY_WRITE) { @@ -305,7 +308,7 @@ int ovl_permission(struct user_namespace *mnt_userns, /* Make sure mounter can read file for copy up later */ mask |= MAY_READ; } - err = inode_permission(&init_user_ns, realinode, mask); + err = inode_permission(mnt_user_ns(realpath.mnt), realinode, mask); revert_creds(old_cred); return err; |