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[Qemu-devel] [PATCH] qcow2: Fix memory leaks in error cases
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH] qcow2: Fix memory leaks in error cases |
Date: |
Wed, 1 Jun 2011 10:57:53 +0200 |
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 <address@hidden>
---
block/qcow2-cluster.c | 2 +-
block/qcow2-refcount.c | 9 ++++++---
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index c56651c..67230fc 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -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);
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index d62dc1c..ac95b88 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -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;
}
--
1.7.5.2
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