From f172393952a8771ca8970b8fcdd332a5a6ea0f56 Mon Sep 17 00:00:00 2001 From: Wang Shilong Date: Fri, 29 Mar 2013 23:03:21 +0000 Subject: [PATCH] Btrfs: kill some BUG_ONs() in the find_parent_nodes() The reason that BUG_ON() happens in these places is just because of ENOMEM. We try ro return ENOMEM rather than trigger BUG_ON(), the caller will abort the transaction thus avoiding the kernel panic. Signed-off-by: Wang Shilong Reviewed-by: Miao Xie Reviewed-by: Jan Schmidt Signed-off-by: Josef Bacik --- fs/btrfs/backref.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index bd605c8..3dd0693 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -900,7 +900,8 @@ again: if (ref->count && ref->root_id && ref->parent == 0) { /* no parent == root of tree */ ret = ulist_add(roots, ref->root_id, 0, GFP_NOFS); - BUG_ON(ret < 0); + if (ret < 0) + goto out; } if (ref->count && ref->parent) { struct extent_inode_elem *eie = NULL; @@ -920,6 +921,8 @@ again: ret = ulist_add_merge(refs, ref->parent, (uintptr_t)ref->inode_list, (u64 *)&eie, GFP_NOFS); + if (ret < 0) + goto out; if (!ret && extent_item_pos) { /* * we've recorded that parent, so we must extend @@ -930,7 +933,6 @@ again: eie = eie->next; eie->next = ref->inode_list; } - BUG_ON(ret < 0); } kfree(ref); } -- 2.7.4