[libvirt] [PATCH] qemu: don't leak in qemuGetDHCPInterfaces when failing to alloc

From: Chen Hanxiao <chenhanxiao@gmail.com> We forgot to free alloced mem when failed to dup ifname or macaddr. Also use VIR_STEAL_PTR to simplify codes. Signed-off-by: Chen Hanxiao <chenhanxiao@gmail.com> --- src/qemu/qemu_agent.c | 3 +-- src/qemu/qemu_driver.c | 7 +++---- 2 files changed, 4 insertions(+), 6 deletions(-) diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c index 5d125c413..0f36054a6 100644 --- a/src/qemu/qemu_agent.c +++ b/src/qemu/qemu_agent.c @@ -2190,8 +2190,7 @@ qemuAgentGetInterfaces(qemuAgentPtr mon, iface->naddrs = addrs_count; } - *ifaces = ifaces_ret; - ifaces_ret = NULL; + VIR_STEAL_PTR(*ifaces, ifaces_ret); ret = ifaces_count; cleanup: diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 978ecd4e0..60cdd237a 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -20569,10 +20569,10 @@ qemuGetDHCPInterfaces(virDomainPtr dom, goto error; if (VIR_STRDUP(iface->name, vm->def->nets[i]->ifname) < 0) - goto cleanup; + goto error; if (VIR_STRDUP(iface->hwaddr, macaddr) < 0) - goto cleanup; + goto error; } for (j = 0; j < n_leases; j++) { @@ -20592,8 +20592,7 @@ qemuGetDHCPInterfaces(virDomainPtr dom, VIR_FREE(leases); } - *ifaces = ifaces_ret; - ifaces_ret = NULL; + VIR_STEAL_PTR(*ifaces, ifaces_ret); rv = ifaces_count; cleanup: -- 2.14.3

On 02/11/2018 04:07 AM, Chen Hanxiao wrote:
From: Chen Hanxiao <chenhanxiao@gmail.com>
We forgot to free alloced mem when failed to dup ifname or macaddr.
Also use VIR_STEAL_PTR to simplify codes.
Signed-off-by: Chen Hanxiao <chenhanxiao@gmail.com> --- src/qemu/qemu_agent.c | 3 +-- src/qemu/qemu_driver.c | 7 +++---- 2 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c index 5d125c413..0f36054a6 100644 --- a/src/qemu/qemu_agent.c +++ b/src/qemu/qemu_agent.c @@ -2190,8 +2190,7 @@ qemuAgentGetInterfaces(qemuAgentPtr mon, iface->naddrs = addrs_count; }
- *ifaces = ifaces_ret; - ifaces_ret = NULL; + VIR_STEAL_PTR(*ifaces, ifaces_ret); ret = ifaces_count;
cleanup: diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 978ecd4e0..60cdd237a 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -20569,10 +20569,10 @@ qemuGetDHCPInterfaces(virDomainPtr dom, goto error;
if (VIR_STRDUP(iface->name, vm->def->nets[i]->ifname) < 0) - goto cleanup; + goto error;
if (VIR_STRDUP(iface->hwaddr, macaddr) < 0) - goto cleanup; + goto error; }
for (j = 0; j < n_leases; j++) {
Almost. There's another 'goto cleanup' in this for() loop. I'm fixing that too. ACKing and pushing. Michal
participants (2)
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Chen Hanxiao
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Michal Privoznik