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Btrfs: do error checking in btrfs_del_csums

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Got a report of a box panicing because we got a NULL eb in read_extent_buffer.
His fs was borked and btrfs_search_path returned EIO, but we don't check for
errors so the box paniced.  Yes I know this will just make something higher up
the stack panic, but that's a problem for future Josef.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Josef Bacik 2011-01-28 18:44:44 +00:00 committed by Chris Mason
parent 68a82277b8
commit ad0397a7a9
1 changed files with 3 additions and 0 deletions
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3
fs/btrfs/file-item.c
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@ -550,7 +550,10 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
if (path->slots[0] == 0)
goto out;
path->slots[0]--;
} else if (ret < 0) {
goto out;
}
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);