From: Al Viro <[email protected]> This patch does NOT apply to the 3.12 stable tree. If you still want it applied, please provide a backport.
=============== commit 0b1b901b5a98bb36943d10820efc796f7cd45ff3 upstream. If the dest_mnt is not shared, propagate_mnt() does nothing - there's no mounts to propagate to and thus no copies to create. Might as well don't bother calling it in that case. Cc: [email protected] Signed-off-by: Al Viro <[email protected]> --- fs/namespace.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/fs/namespace.c b/fs/namespace.c index 9db3ce397a83..d3fb9f00576e 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1653,16 +1653,14 @@ static int attach_recursive_mnt(struct mount *source_mnt, err = invent_group_ids(source_mnt, true); if (err) goto out; - } - err = propagate_mnt(dest_mnt, dest_mp, source_mnt, &tree_list); - if (err) - goto out_cleanup_ids; - - lock_mount_hash(); - - if (IS_MNT_SHARED(dest_mnt)) { + err = propagate_mnt(dest_mnt, dest_mp, source_mnt, &tree_list); + if (err) + goto out_cleanup_ids; + lock_mount_hash(); for (p = source_mnt; p; p = next_mnt(p, source_mnt)) set_mnt_shared(p); + } else { + lock_mount_hash(); } if (parent_path) { detach_mnt(source_mnt, parent_path); @@ -1685,8 +1683,7 @@ static int attach_recursive_mnt(struct mount *source_mnt, return 0; out_cleanup_ids: - if (IS_MNT_SHARED(dest_mnt)) - cleanup_group_ids(source_mnt, NULL); + cleanup_group_ids(source_mnt, NULL); out: return err; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
