From cdccee993f2f3466f69a358daec19de744a02f92 Mon Sep 17 00:00:00 2001 From: Liu Bo Date: Fri, 18 Aug 2017 15:15:23 -0600 Subject: [PATCH] Btrfs: remove BUG_ON in __add_tree_block The BUG_ON() can be triggered when the caller is processing an invalid extent inline ref, e.g. a shared data ref is offered instead of an extent data ref, such that it tries to find a non-existent tree block and then btrfs_search_slot returns 1 for no such item. This replaces the BUG_ON() with a WARN() followed by calling btrfs_print_leaf() to show more details about what's going on and returning -EINVAL to upper callers. Signed-off-by: Liu Bo Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/relocation.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 1c086d0667be..3a49a3c2fca4 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -32,6 +32,7 @@ #include "free-space-cache.h" #include "inode-map.h" #include "qgroup.h" +#include "print-tree.h" /* * backref_node, mapping_node and tree_block start with this @@ -3483,7 +3484,16 @@ again: goto again; } } - BUG_ON(ret); + if (ret) { + ASSERT(ret == 1); + btrfs_print_leaf(path->nodes[0]); + btrfs_err(fs_info, + "tree block extent item (%llu) is not found in extent tree", + bytenr); + WARN_ON(1); + ret = -EINVAL; + goto out; + } ret = add_tree_block(rc, &key, path, blocks); out: