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dm btree: fix leak of bufio-backed block in btree_split_beneath error path
btree_split_beneath()'s error path had an outstanding FIXME that speaks directly to the potential for _not_ cleaning up a previously allocated bufio-backed block. Fix this by releasing the previously allocated bufio block using unlock_block(). Reported-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: Joe Thornber <thornber@redhat.com> Cc: stable@vger.kernel.org
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@ -523,7 +523,7 @@ static int btree_split_beneath(struct shadow_spine *s, uint64_t key)
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r = new_block(s->info, &right);
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if (r < 0) {
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/* FIXME: put left */
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unlock_block(s->info, left);
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return r;
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}
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