linux-kernel - [BUG] infiniband: mlx5: a possible null-pointer dereference in set_roce

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Message-ID: <f99031cc-795e-92bd-9310-29c669ada7dc@gmail.com>
Date:   Mon, 29 Jul 2019 10:16:30 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     leon@...nel.org, dledford@...hat.com, jgg@...pe.ca
Cc:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [BUG] infiniband: mlx5: a possible null-pointer dereference in
 set_roce_addr()

In set_roce_addr(), there is an if statement on line 589 to check 
whether gid is NULL:
     if (gid)

When gid is NULL, it is used on line 613:
     return mlx5_core_roce_gid_set(..., gid->raw, ...);

Thus, a possible null-pointer dereference may occur.

This bug is found by a static analysis tool STCheck written by us.

I do not know how to correctly fix this bug, so I only report it.


Best wishes,
Jia-Ju Bai