linux-kernel - Potential NULL pointer deference inata: sata

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Date:   Wed, 9 Oct 2019 22:32:18 -0700
From:   Yizhuo Zhai <yzhai003@....edu>
To:     Jens Axboe <axboe@...nel.dk>, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org, Zhiyun Qian <zhiyunq@...ucr.edu>,
        Chengyu Song <csong@...ucr.edu>
Subject: Potential NULL pointer deference inata: sata_rcar

Hi All:
In function sata_rcar_bmdma_fill_sg, macro for_each_sg uses sg_next(),
which could return NULL as "sg", however, there's no check before
dereferencing it (in sg_dma_address()), which is potentially unsafe.

-- 
Kind Regards,

Yizhuo Zhai

Computer Science, Graduate Student
University of California, Riverside