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Message-Id: <1450367223-21068-2-git-send-email-mathieu.poirier@linaro.org> Date: Thu, 17 Dec 2015 08:47:02 -0700 From: Mathieu Poirier <mathieu.poirier@...aro.org> To: gregkh@...uxfoundation.org Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH 1/2] 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@...r.kernel.org> # v3.18+ Reported-by: Tyler Baker <tyler.baker@...aro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org> --- 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 e25492137d8b..93738dfbf631 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -548,7 +548,7 @@ 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; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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