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qcow2: Fix memory leaks in error cases 

This fixes memory leaks that may be caused by I/O errors during L1 table growth
(can happen during save_vm) and in qemu-img check.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2011-06-01 10:50:00 +02:00
parent 30cdc48cc8
commit 80fa3341a7
2 changed files with 7 additions and 4 deletions
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2
block/qcow2-cluster.c
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@ -70,7 +70,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, int min_size, bool exact_size)
ret = qcow2_cache_flush(bs, s->refcount_block_cache);
if (ret < 0) {
return ret;
goto fail;
}
BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_WRITE_TABLE);

9
block/qcow2-refcount.c
View File

@ -1086,7 +1086,7 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res)
ret = check_refcounts_l1(bs, res, refcount_table, nb_clusters,
s->l1_table_offset, s->l1_size, 1);
if (ret < 0) {
return ret;
goto fail;
}
/* snapshots */
@ -1095,7 +1095,7 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res)
ret = check_refcounts_l1(bs, res, refcount_table, nb_clusters,
sn->l1_table_offset, sn->l1_size, 0);
if (ret < 0) {
return ret;
goto fail;
}
}
inc_refcounts(bs, res, refcount_table, nb_clusters,
@ -1159,8 +1159,11 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res)
}
}
ret = 0;
fail:
qemu_free(refcount_table);
return 0;
return ret;
}