On 5/13/21 1:37 PM, Li Zhijian wrote:
> A segmentation fault was triggered when i try to abort a postcopy + rdma
> migration.
>
> since rdma_ack_cm_event releases a uninitialized cm_event in thise case.
>
> like below:
> 2496 ret = rdma_get_cm_event(rdma->channel, &cm_event);
> 2497 if (ret) {
> 2498 perror("rdma_get_cm_event after rdma_connect");
> 2499 ERROR(errp, "connecting to destination!");
> 2500 rdma_ack_cm_event(cm_event); <<<< cause segmentation fault
> 2501 goto err_rdma_source_connect;
> 2502 }
>
> Signed-off-by: Li Zhijian <[email protected]>
> ---
> migration/rdma.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/migration/rdma.c b/migration/rdma.c
> index 00eac34232..2dadb62aed 100644
> --- a/migration/rdma.c
> +++ b/migration/rdma.c
> @@ -2466,7 +2466,7 @@ static int qemu_rdma_connect(RDMAContext *rdma, Error
> **errp)
> .private_data = &cap,
> .private_data_len = sizeof(cap),
> };
> - struct rdma_cm_event *cm_event;
> + struct rdma_cm_event *cm_event = NULL;
> int ret;
>
> /*
>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
