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| author | Liu Bo <bo.li.liu@oracle.com> | 2016-09-14 19:19:05 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-16 22:16:07 +0100 |
| commit | 79ddacdf1df2dc886d11737da2816423129ba4a4 (patch) | |
| tree | 7ceeb76376d51aeb8c20c97fd81d359aeaff13da | |
| parent | d6719cf116b2fc8a7f51e84430c28febfac1eded (diff) | |
| download | linux-stable-79ddacdf1df2dc886d11737da2816423129ba4a4.tar.gz linux-stable-79ddacdf1df2dc886d11737da2816423129ba4a4.tar.bz2 linux-stable-79ddacdf1df2dc886d11737da2816423129ba4a4.zip | |
Btrfs: kill BUG_ON in run_delayed_tree_ref
commit 02794222c4132ac003e7281fb71f4ec1645ffc87 upstream.
In a corrupted btrfs image, we can come across this BUG_ON and
get an unreponsive system, but if we return errors instead,
its caller can handle everything gracefully by aborting the current
transaction.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index abfd2320873d..14549387b518 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2342,7 +2342,13 @@ static int run_delayed_tree_ref(struct btrfs_trans_handle *trans, ins.type = BTRFS_EXTENT_ITEM_KEY; } - BUG_ON(node->ref_mod != 1); + if (node->ref_mod != 1) { + btrfs_err(root->fs_info, + "btree block(%llu) has %d references rather than 1: action %d ref_root %llu parent %llu", + node->bytenr, node->ref_mod, node->action, ref_root, + parent); + return -EIO; + } if (node->action == BTRFS_ADD_DELAYED_REF && insert_reserved) { BUG_ON(!extent_op || !extent_op->update_flags); ret = alloc_reserved_tree_block(trans, root, |