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Date: Sun, 3 Sep 2017 13:46:14 +0100 From: Colin King <colin.king@...onical.com> To: Ohad Ben-Cohen <ohad@...ery.com>, Bjorn Andersson <bjorn.andersson@...aro.org>, linux-remoteproc@...r.kernel.org Cc: kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH][rpmsg-next] rpmsg: glink: fix null pointer dereference on a null intent From: Colin Ian King <colin.king@...onical.com> In the case where glink->intentless is true and the call to qcom_glink_tx fails then we have a condition where ret is non-zero and intent is null, causing a null pointer deference when setting intent->in_use to false. Add an extra check to only dereference intent if intent is non-null. Detected by: CoverityScan CID#1455247 ("Explicit null dereferenced") Fixes: 88c6060f5a7f ("rpmsg: glink: Handle remote rx done command") Signed-off-by: Colin Ian King <colin.king@...onical.com> --- drivers/rpmsg/qcom_glink_native.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index 666068202597..8bc0d0456a40 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1264,7 +1264,7 @@ static int __qcom_glink_send(struct glink_channel *channel, ret = qcom_glink_tx(glink, &req, sizeof(req), data, len, wait); /* Mark intent available if we failed */ - if (ret) + if (ret && intent) intent->in_use = false; return ret; -- 2.14.1
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