2019-07-26 14:25:51

by Santosh Shilimkar

[permalink] [raw]
Subject: Re: [PATCH] net: rds: Fix possible null-pointer dereferences in rds_rdma_cm_event_handler_cmn()

On 7/26/19 7:17 AM, Jia-Ju Bai wrote:
> In rds_rdma_cm_event_handler_cmn(), there are some if statements to
> check whether conn is NULL, such as on lines 65, 96 and 112.
> But conn is not checked before being used on line 108:
> trans->cm_connect_complete(conn, event);
> and on lines 140-143:
> rdsdebug("DISCONNECT event - dropping connection "
> "%pI6c->%pI6c\n", &conn->c_laddr,
> &conn->c_faddr);
> rds_conn_drop(conn);
>
> Thus, possible null-pointer dereferences may occur.
>
> To fix these bugs, conn is checked before being used.
>
> These bugs are found by a static analysis tool STCheck written by us.
>
> Signed-off-by: Jia-Ju Bai <[email protected]>
> ---
That's possible. Looks good.

Acked-by: Santosh Shilimkar <[email protected]>