[libvirt] [PATCH 05/17] Fix leak of address string in qemuDomainPCIAddressGetNextSlot

[Doug Goldstein]

On Tue, Sep 24, 2013 at 11:03 AM, Daniel P. Berrange
<berrange at redhat.com> wrote:
> From: "Daniel P. Berrange" <berrange at redhat.com>
>
> qemuDomainPCIAddressGetNextSlot has a loop for finding
> compatible PCI buses. In the loop body it creates a
> PCI address string, but never frees this. This causes
> a leak if the loop executes more than one iteration,
> or if a call in the loop body fails.
>
> Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
> ---
>  src/qemu/qemu_command.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> index 0376611..3296d09 100644
> --- a/src/qemu/qemu_command.c
> +++ b/src/qemu/qemu_command.c
> @@ -2194,12 +2194,12 @@ qemuDomainPCIAddressGetNextSlot(qemuDomainPCIAddressSetPtr addrs,
>
>      /* Start the search at the last used bus and slot */
>      for (a.slot++; a.bus < addrs->nbuses; a.bus++) {
> -        addrStr = NULL;
>          if (!(addrStr = qemuDomainPCIAddressAsString(&a)))
>              goto error;
>          if (!qemuDomainPCIAddressFlagsCompatible(&a, addrStr,
>                                                   addrs->buses[a.bus].flags,
>                                                   flags, false, false)) {
> +            VIR_FREE(addrStr);
>              VIR_DEBUG("PCI bus %.4x:%.2x is not compatible with the device",
>                        a.domain, a.bus);
>              continue;
> @@ -2212,6 +2212,7 @@ qemuDomainPCIAddressGetNextSlot(qemuDomainPCIAddressSetPtr addrs,
>                        a.domain, a.bus, a.slot);
>          }
>          a.slot = 1;
> +        VIR_FREE(addrStr);
>      }
>
>      /* There were no free slots after the last used one */
> --
> 1.8.3.1
>
> --
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ACK

-- 
Doug Goldstein