Re: [PATCH] net: 9p: Fix a possible null-pointer dereference in p9_cm_event_handler()

[Christian Schoenebeck]

On Thursday, 18 December 2025 08:10:12 CET Tuo Li wrote:
> In p9_cm_event_handler(), rdma is checked in the RDMA_CM_EVENT_DISCONNECTED
> case, indicating that it may be NULL. If this happens, a null-pointer
> dereference can occur when complete() is called:
> 
>   complete(&rdma->cm_done);
> 
> To prevent such a potential null-pointer dereference, add a defensive check
> before invoking complete().
> 
> Signed-off-by: Tuo Li <islituo@xxxxxxxxx>
> ---

Reviewed-by: Christian Schoenebeck <linux_oss@xxxxxxxxxxxxx>