Re: [libvirt PATCH 1/3] xenParseHypervisorFeatures: Fix memory leak

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On 4/16/21 2:25 AM, Peter Krempa wrote:
On Thu, Apr 15, 2021 at 17:08:26 +0200, Tim Wiederhake wrote:

Fixes: b523e22521a

Signed-off-by: Tim Wiederhake <twiederh@xxxxxxxxxx>
---
  src/libxl/xen_common.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/src/libxl/xen_common.c b/src/libxl/xen_common.c
index 12a44280cb..ad5a3de116 100644
--- a/src/libxl/xen_common.c
+++ b/src/libxl/xen_common.c
@@ -567,6 +567,7 @@ xenParseHypervisorFeatures(virConf *conf, virDomainDef *def)
              timer->mode = VIR_DOMAIN_TIMER_MODE_PARAVIRT;
def->clock.timers[def->clock.ntimers - 1] = timer;
+        VIR_FREE(strval);

While this fixes the specific problem, it still leaves possibility for
making a mistake again since 'strval' isn't explicitly freed after the
second use.

A preferrable fix is to use one variable per use when used with
g_autofree or remove g_autofree and explicitly free it after both uses.

Since there are only two uses, I prefer this approach as well. E.g.

g_autofree char *tscmode = NULL;
g_autofree char *passthrough = NULL;

Regards,
Jim




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