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btrfs: remove BUG_ON(!eie) in find_parent_nodes

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[ Upstream commit 9f05c09d6baef789726346397438cca4ec43c3ee ]

If we're looking for leafs that point to a data extent we want to record
the extent items that point at our bytenr.  At this point we have the
reference and we know for a fact that this leaf should have a reference
to our bytenr.  However if there's some sort of corruption we may not
find any references to our leaf, and thus could end up with eie == NULL.
Replace this BUG_ON() with an ASSERT() and then return -EUCLEAN for the
mortals.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Josef Bacik
2021-11-05 16:45:35 -04:00
committed by Greg Kroah-Hartman
parent 623c65bc73
commit 6b22c9824d
1 changed files with 11 additions and 3 deletions
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14
fs/btrfs/backref.c
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@@ -1366,10 +1366,18 @@ again:
goto out; goto out;
if (!ret && extent_item_pos) { if (!ret && extent_item_pos) {
/* /*
* we've recorded that parent, so we must extend * We've recorded that parent, so we must extend
* its inode list here * its inode list here.
*
* However if there was corruption we may not
* have found an eie, return an error in this
* case.
*/ */
BUG_ON(!eie); ASSERT(eie);
if (!eie) {
ret = -EUCLEAN;
goto out;
}
while (eie->next) while (eie->next)
eie = eie->next; eie = eie->next;
eie->next = ref->inode_list; eie->next = ref->inode_list;