[libvirt] [PATCH 03/14] storage: Resolve resource leak using 'vol' buffer
Eric Blake
eblake at redhat.com
Fri Jan 11 00:14:28 UTC 2013
On 01/09/2013 07:54 AM, John Ferlan wrote:
> ---
> src/storage/storage_backend_rbd.c | 13 ++++++++++---
> 1 file changed, 10 insertions(+), 3 deletions(-)
>
> vol->name = strdup(name);
> - if (vol->name == NULL)
> + if (vol->name == NULL) {
> + VIR_FREE(vol);
> goto out_of_memory;
> + }
>
> - if (STREQ(vol->name, ""))
> + if (STREQ(vol->name, "")) {
> + VIR_FREE(vol->name);
> + VIR_FREE(vol);
> break;
> + }
It feels a bit awkward having to free more and more for each break. I
rearranged the code slightly to hoist the validation prior to the
malloc. ACK and pushed with this squashed in:
diff --git i/src/storage/storage_backend_rbd.c
w/src/storage/storage_backend_rbd.c
index f916de1..8a0e517 100644
--- i/src/storage/storage_backend_rbd.c
+++ w/src/storage/storage_backend_rbd.c
@@ -1,6 +1,7 @@
/*
* storage_backend_rbd.c: storage backend for RBD (RADOS Block Device)
handling
*
+ * Copyright (C) 2013 Red Hat, Inc.
* Copyright (C) 2012 Wido den Hollander
*
* This library is free software; you can redistribute it and/or
@@ -319,12 +320,16 @@ static int
virStorageBackendRBDRefreshPool(virConnectPtr conn ATTRIBUTE_UNUSED,
}
for (i = 0, name = names; name < names + max_size; i++) {
+ virStorageVolDefPtr vol;
+
if (VIR_REALLOC_N(pool->volumes.objs, pool->volumes.count + 1)
< 0) {
virStoragePoolObjClearVols(pool);
goto out_of_memory;
}
- virStorageVolDefPtr vol;
+ if (STREQ(name, ""))
+ break;
+
if (VIR_ALLOC(vol) < 0)
goto out_of_memory;
@@ -334,12 +339,6 @@ static int
virStorageBackendRBDRefreshPool(virConnectPtr conn ATTRIBUTE_UNUSED,
goto out_of_memory;
}
- if (STREQ(vol->name, "")) {
- VIR_FREE(vol->name);
- VIR_FREE(vol);
- break;
- }
-
name += strlen(name) + 1;
if (volStorageBackendRBDRefreshVolInfo(vol, pool, ptr) < 0) {
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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