linux-kernel - Potential uninitialized variables in rtc: ds1343

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Date:   Wed, 9 Oct 2019 17:36:28 -0700
From:   Yizhuo Zhai <yzhai003@....edu>
To:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zhiyun Qian <zhiyunq@...ucr.edu>,
        Chengyu Song <csong@...ucr.edu>
Subject: Potential uninitialized variables in rtc: ds1343

Hi All:
drivers/rtc/rtc-ds1343.c:
Inside function ds1343_show_glitchfilter(), variable "data" could be
uninitialized if regmap_read() returns -EINVAL. However,"data"
is used later in the if statement, which is potentially unsafe. Patch
for this case is hard since the return value -EINVAL is unacceptable
for ds1343_show_glitchfilter().

-- 
Kind Regards,

Yizhuo Zhai

Computer Science, Graduate Student
University of California, Riverside