[Drbd-dev] Potentially invalid memory accesses in file drivers/block/drbd/drbd_worker.c

Roland Kammerer roland.kammerer at linbit.com
Thu Jul 20 14:10:31 CEST 2017

On Wed, Jul 19, 2017 at 10:50:47PM -0600, Shaobo wrote:
> Hi there,
> My name is Shaobo He and I am a graduate student at University of Utah. I am
> using a static analysis tool to search for null pointer dereferences and
> came across a couple of potentially invalid memory accesses in the file
> drivers/block/drbd/drbd_worker.c: in function `drbd_start_resync`, pointer
> variable `connection` in line 1727 can be NULL while is dereferenced at line
> 1767 (```if (current == connection->worker.task) {```).
> Please let me know if it makes sense. I am looking forward to your reply.

Hi Shaobo,

While highly theoretical and unlikely, better be safe than sorry. Fixed
and we will send that to mainline Linux soon.

Regards, rck

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