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

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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 <baijiaju1990@xxxxxxxxx>
---
That's possible. Looks good.

Acked-by: Santosh Shilimkar <santosh.shilimkar@xxxxxxxxxx>





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