coresight: checking for NULL string in coresight_name_match()
authorMathieu Poirier <mathieu.poirier@linaro.org>
Thu, 17 Dec 2015 15:47:02 +0000 (08:47 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 21 Dec 2015 21:31:31 +0000 (13:31 -0800)
commitfadf3a44e974b030e7145218ad1ab25e3ef91738
tree284865baafd4c8bb1c9d8a5822b4d117536198d6
parent879a650a273bc3efb9d472886b8ced12630ea8ed
coresight: checking for NULL string in coresight_name_match()

Connection child names associated to ports can sometimes be NULL,
which is the case when booting a system on QEMU or when the Coresight
power domain isn't switched on.

This patch is adding a check to make sure a NULL string isn't fed
to strcmp(), something that avoid crashing the system.

Cc: <stable@vger.kernel.org> # v3.18+
Reported-by: Tyler Baker <tyler.baker@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/hwtracing/coresight/coresight.c