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btrfs: fix oops on failure path
authorDaniel J Blueman <daniel.blueman@gmail.com>
Thu, 23 Jun 2011 15:01:01 +0000 (23:01 +0800)
committerDavid Sterba <dsterba@suse.cz>
Thu, 20 Oct 2011 16:10:50 +0000 (18:10 +0200)
If lookup_extent_backref fails, path->nodes[0] reasonably could be
null along with other callers of btrfs_print_leaf, so ensure we have a
valid extent buffer before dereferencing.

Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>

No differences found
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