linux-kernel - Potential NULL pointer deference in cxgbit

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Date:   Mon, 7 Oct 2019 12:03:50 -0700
From:   Yizhuo Zhai <yzhai003@....edu>
To:     martin.petersen@...cle.com,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Allison Randal <allison@...utok.net>, varun@...lsio.com,
        Enrico Weigelt <info@...ux.net>, bvanassche@....org,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Zhiyun Qian <zhiyunq@...ucr.edu>,
        Chengyu Song <csong@...ucr.edu>
Subject: Potential NULL pointer deference in cxgbit

Hi All:

drivers/target/iscsi/cxgbit/cxgbit_ddp.c:

Inside function cxgbit_ddp_sgl_check(), sg_next() could return NULL,
however, the return value of sg_next() is not checked and get
dereferenced. This could potentially be unsafe.

-- 
Kind Regards,

Yizhuo Zhai

Computer Science, Graduate Student
University of California, Riverside