From: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> This patch has been added to the 4.1 stable tree. If you have any objections, please let us know. =============== [ Upstream commit fadf3a44e974b030e7145218ad1ab25e3ef91738 ] 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@xxxxxxxxxxxxxxx> # v3.18+ Reported-by: Tyler Baker <tyler.baker@xxxxxxxxxx> Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> --- drivers/hwtracing/coresight/coresight.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 894531d..046144f 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -543,7 +543,7 @@ static int coresight_name_match(struct device *dev, void *data) to_match = data; i_csdev = to_coresight_device(dev); - if (!strcmp(to_match, dev_name(&i_csdev->dev))) + if (to_match && !strcmp(to_match, dev_name(&i_csdev->dev))) return 1; return 0; -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html