From: bai <baijiaju1990@gmail.com>
To: b.zolnierkie@samsung.com
Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [BUG] video: fbdev: broadsheetfb: Possible null function pointers
Date: Thu, 26 Jul 2018 14:17:44 +0000 [thread overview]
Message-ID: <cb43741a-83af-0b55-f53b-489bf7cb8b61@gmail.com> (raw)
In Linux-4.16, drivers/video/fbdev/broadsheetfb.c,
158. static void broadsheet_mmio_send_cmdargs(...) {
......
163. par->board->mmio_write(...);
......
166. par->board->mmio_write(...);
167. }
For x86 kernel configuration, I find that there is no assignment of the
function pointer ".mmio_write" in the kernel code.
So calling the function pointer in lines 163 and 166 may cause a null
pointer dereference.
In this file, there are many calls to this function pointer...
Best wishes,
Jia-Ju Bai
next reply other threads:[~2018-07-26 14:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20180726141748epcas1p28f6f11fea0152ed22113351e3a0affbc@epcas1p2.samsung.com>
2018-07-26 14:17 ` bai [this message]
2018-07-26 14:34 ` [BUG] video: fbdev: broadsheetfb: Possible null function pointers Bartlomiej Zolnierkiewicz
2018-07-27 1:49 ` Jia-Ju Bai
2018-07-27 8:06 ` Bartlomiej Zolnierkiewicz
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