* [dpdk-stable] [PATCH] vhost: fix crash on reconnect
@ 2021-07-26 7:58 Maxime Coquelin
2021-07-26 8:13 ` Wang, Yinan
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Maxime Coquelin @ 2021-07-26 7:58 UTC (permalink / raw)
To: dev, chenbo.xia, yinan.wang, weix.ling; +Cc: Maxime Coquelin, stable
When the vhost-user frontend like Virtio-user tries to
reconnect to the restarted Vhost backend, the Vhost backend
segfaults when multiqueue is enabled.
This is caused by VHOST_USER_GET_VRING_BASE being called for
a virtqueue that has not been created before, causing a NULL
pointer dereferencing.
This patch adds the VHOST_USER_GET_VRING_BASE requests to
the list of requests that trigger queue pair allocations.
Fixes: 160cbc815b41 ("vhost: remove a hack on queue allocation")
Cc: stable@dpdk.org
Reported-by: Yinan Wang <yinan.wang@intel.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
lib/vhost/vhost_user.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 433f412fa8..29a4c9af60 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -2796,6 +2796,7 @@ vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
break;
case VHOST_USER_SET_VRING_NUM:
case VHOST_USER_SET_VRING_BASE:
+ case VHOST_USER_GET_VRING_BASE:
case VHOST_USER_SET_VRING_ENABLE:
vring_idx = msg->payload.state.index;
break;
--
2.31.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [dpdk-stable] [PATCH] vhost: fix crash on reconnect
2021-07-26 7:58 [dpdk-stable] [PATCH] vhost: fix crash on reconnect Maxime Coquelin
@ 2021-07-26 8:13 ` Wang, Yinan
2021-07-27 1:58 ` Xia, Chenbo
2021-07-28 6:51 ` Xia, Chenbo
2 siblings, 0 replies; 4+ messages in thread
From: Wang, Yinan @ 2021-07-26 8:13 UTC (permalink / raw)
To: Maxime Coquelin, dev, Xia, Chenbo, Ling, WeiX; +Cc: stable
Tested-by: Yinan Wang <yinan.wang@intel.com>
> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin@redhat.com>
> Sent: 2021?7?26? 15:58
> To: dev@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>; Wang, Yinan
> <yinan.wang@intel.com>; Ling, WeiX <weix.ling@intel.com>
> Cc: Maxime Coquelin <maxime.coquelin@redhat.com>; stable@dpdk.org
> Subject: [PATCH] vhost: fix crash on reconnect
>
> When the vhost-user frontend like Virtio-user tries to
> reconnect to the restarted Vhost backend, the Vhost backend
> segfaults when multiqueue is enabled.
>
> This is caused by VHOST_USER_GET_VRING_BASE being called for
> a virtqueue that has not been created before, causing a NULL
> pointer dereferencing.
>
> This patch adds the VHOST_USER_GET_VRING_BASE requests to
> the list of requests that trigger queue pair allocations.
>
> Fixes: 160cbc815b41 ("vhost: remove a hack on queue allocation")
> Cc: stable@dpdk.org
>
> Reported-by: Yinan Wang <yinan.wang@intel.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
> lib/vhost/vhost_user.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
> index 433f412fa8..29a4c9af60 100644
> --- a/lib/vhost/vhost_user.c
> +++ b/lib/vhost/vhost_user.c
> @@ -2796,6 +2796,7 @@ vhost_user_check_and_alloc_queue_pair(struct
> virtio_net *dev,
> break;
> case VHOST_USER_SET_VRING_NUM:
> case VHOST_USER_SET_VRING_BASE:
> + case VHOST_USER_GET_VRING_BASE:
> case VHOST_USER_SET_VRING_ENABLE:
> vring_idx = msg->payload.state.index;
> break;
> --
> 2.31.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [dpdk-stable] [PATCH] vhost: fix crash on reconnect
2021-07-26 7:58 [dpdk-stable] [PATCH] vhost: fix crash on reconnect Maxime Coquelin
2021-07-26 8:13 ` Wang, Yinan
@ 2021-07-27 1:58 ` Xia, Chenbo
2021-07-28 6:51 ` Xia, Chenbo
2 siblings, 0 replies; 4+ messages in thread
From: Xia, Chenbo @ 2021-07-27 1:58 UTC (permalink / raw)
To: Maxime Coquelin, dev, Wang, Yinan, Ling, WeiX; +Cc: stable
> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin@redhat.com>
> Sent: Monday, July 26, 2021 3:58 PM
> To: dev@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>; Wang, Yinan
> <yinan.wang@intel.com>; Ling, WeiX <weix.ling@intel.com>
> Cc: Maxime Coquelin <maxime.coquelin@redhat.com>; stable@dpdk.org
> Subject: [PATCH] vhost: fix crash on reconnect
>
> When the vhost-user frontend like Virtio-user tries to
> reconnect to the restarted Vhost backend, the Vhost backend
> segfaults when multiqueue is enabled.
>
> This is caused by VHOST_USER_GET_VRING_BASE being called for
> a virtqueue that has not been created before, causing a NULL
> pointer dereferencing.
>
> This patch adds the VHOST_USER_GET_VRING_BASE requests to
> the list of requests that trigger queue pair allocations.
>
> Fixes: 160cbc815b41 ("vhost: remove a hack on queue allocation")
> Cc: stable@dpdk.org
>
> Reported-by: Yinan Wang <yinan.wang@intel.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
> lib/vhost/vhost_user.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
> index 433f412fa8..29a4c9af60 100644
> --- a/lib/vhost/vhost_user.c
> +++ b/lib/vhost/vhost_user.c
> @@ -2796,6 +2796,7 @@ vhost_user_check_and_alloc_queue_pair(struct virtio_net
> *dev,
> break;
> case VHOST_USER_SET_VRING_NUM:
> case VHOST_USER_SET_VRING_BASE:
> + case VHOST_USER_GET_VRING_BASE:
> case VHOST_USER_SET_VRING_ENABLE:
> vring_idx = msg->payload.state.index;
> break;
> --
> 2.31.1
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [dpdk-stable] [PATCH] vhost: fix crash on reconnect
2021-07-26 7:58 [dpdk-stable] [PATCH] vhost: fix crash on reconnect Maxime Coquelin
2021-07-26 8:13 ` Wang, Yinan
2021-07-27 1:58 ` Xia, Chenbo
@ 2021-07-28 6:51 ` Xia, Chenbo
2 siblings, 0 replies; 4+ messages in thread
From: Xia, Chenbo @ 2021-07-28 6:51 UTC (permalink / raw)
To: Maxime Coquelin, dev, Wang, Yinan, Ling, WeiX; +Cc: stable
> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin@redhat.com>
> Sent: Monday, July 26, 2021 3:58 PM
> To: dev@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>; Wang, Yinan
> <yinan.wang@intel.com>; Ling, WeiX <weix.ling@intel.com>
> Cc: Maxime Coquelin <maxime.coquelin@redhat.com>; stable@dpdk.org
> Subject: [PATCH] vhost: fix crash on reconnect
>
> When the vhost-user frontend like Virtio-user tries to
> reconnect to the restarted Vhost backend, the Vhost backend
> segfaults when multiqueue is enabled.
>
> This is caused by VHOST_USER_GET_VRING_BASE being called for
> a virtqueue that has not been created before, causing a NULL
> pointer dereferencing.
>
> This patch adds the VHOST_USER_GET_VRING_BASE requests to
> the list of requests that trigger queue pair allocations.
>
> Fixes: 160cbc815b41 ("vhost: remove a hack on queue allocation")
> Cc: stable@dpdk.org
>
> Reported-by: Yinan Wang <yinan.wang@intel.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
> lib/vhost/vhost_user.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
> index 433f412fa8..29a4c9af60 100644
> --- a/lib/vhost/vhost_user.c
> +++ b/lib/vhost/vhost_user.c
> @@ -2796,6 +2796,7 @@ vhost_user_check_and_alloc_queue_pair(struct virtio_net
> *dev,
> break;
> case VHOST_USER_SET_VRING_NUM:
> case VHOST_USER_SET_VRING_BASE:
> + case VHOST_USER_GET_VRING_BASE:
> case VHOST_USER_SET_VRING_ENABLE:
> vring_idx = msg->payload.state.index;
> break;
> --
> 2.31.1
Applied to next-virtio/main. Thanks!
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-07-28 6:51 UTC | newest]
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2021-07-26 7:58 [dpdk-stable] [PATCH] vhost: fix crash on reconnect Maxime Coquelin
2021-07-26 8:13 ` Wang, Yinan
2021-07-27 1:58 ` Xia, Chenbo
2021-07-28 6:51 ` Xia, Chenbo
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