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rpmsg: glink: fix null pointer dereference on a null intent

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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: 88c6060f5a ("rpmsg: glink: Handle remote rx done command")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Colin Ian King 2017-09-03 13:46:14 +01:00 committed by Bjorn Andersson
parent 2b41d6c8e6
commit 906cf29cfa
1 changed files with 1 additions and 1 deletions
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drivers/rpmsg/qcom_glink_native.c
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@ -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;