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qcow2: Free allocated L2 cluster on error 

If an error occurs in l2_allocate, the allocated (but unused) L2 cluster
should be freed.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Max Reitz 2013-09-25 16:37:19 +02:00 committed by Stefan Hajnoczi
parent fda74f826b
commit e3b21ef9e0
1 changed files with 4 additions and 0 deletions
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block/qcow2-cluster.c
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@ -273,6 +273,10 @@ fail:
qcow2_cache_put(bs, s->l2_table_cache, (void**) table); qcow2_cache_put(bs, s->l2_table_cache, (void**) table);
} }
s->l1_table[l1_index] = old_l2_offset; s->l1_table[l1_index] = old_l2_offset;
if (l2_offset > 0) {
qcow2_free_clusters(bs, l2_offset, s->l2_size * sizeof(uint64_t),
QCOW2_DISCARD_ALWAYS);
}
return ret; return ret;
} }