[Qemu-devel] [PATCH] net/colo-compare.c: Fix a crash in COLO Primary.

[Qemu-devel] [PATCH] net/colo-compare.c: Fix a crash in COLO Primary.

[Lukas Straub]

From: Lukas Straub <lukasstraub2@web.de>
Fixes the following bug: https://bugs.launchpad.net/qemu/+bug/1824622

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
---
 net/colo-compare.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/colo-compare.c b/net/colo-compare.c
index bf10526f05..fcb491121b 100644
--- a/net/colo-compare.c
+++ b/net/colo-compare.c
@@ -813,9 +813,8 @@ static void colo_compare_handle_event(void *opaque)
         break;
     }

-    assert(event_unhandled_count > 0);
-
     qemu_mutex_lock(&event_mtx);
+    assert(event_unhandled_count > 0);
     event_unhandled_count--;
     qemu_cond_broadcast(&event_complete_cond);
     qemu_mutex_unlock(&event_mtx);
--
2.20.1

Re: [Qemu-devel] [PATCH] net/colo-compare.c: Fix a crash in COLO Primary.

[Zhang, Chen]

> -----Original Message-----
> From: Lukas Straub [mailto:lukasstraub2@web.de]
> Sent: Friday, April 19, 2019 9:56 PM
> To: qemu-devel@nongnu.org
> Cc: Zhang, Chen <chen.zhang@intel.com>
> Subject: [PATCH] net/colo-compare.c: Fix a crash in COLO Primary.
> 
> From: Lukas Straub <lukasstraub2@web.de> Fixes the following bug:
> https://bugs.launchpad.net/qemu/+bug/1824622

It looks good for me, but I think you need add more comments in commit message,
For example what situation will trigger this bug and why it will occur.
After that, I think you can close the bug in Launchpad.

Thanks
Zhang Chen

> 
> Signed-off-by: Lukas Straub <lukasstraub2@web.de>
> ---
>  net/colo-compare.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/net/colo-compare.c b/net/colo-compare.c index
> bf10526f05..fcb491121b 100644
> --- a/net/colo-compare.c
> +++ b/net/colo-compare.c
> @@ -813,9 +813,8 @@ static void colo_compare_handle_event(void *opaque)
>          break;
>      }
> 
> -    assert(event_unhandled_count > 0);
> -
>      qemu_mutex_lock(&event_mtx);
> +    assert(event_unhandled_count > 0);
>      event_unhandled_count--;
>      qemu_cond_broadcast(&event_complete_cond);
>      qemu_mutex_unlock(&event_mtx);
> --
> 2.20.1