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authorGustavo A. R. Silva <gustavo@embeddedor.com>2018-07-26 12:11:39 -0500
committerJassi Brar <jaswinder.singh@linaro.org>2018-08-03 18:56:08 +0530
commit3512a18cbd8d09e22a790540cb9624c3c49827ba (patch)
tree71bdba1f0683118e899ecfb67e5f08fc5523b279 /drivers/mailbox
parent0585df468e8f4481b78256a2bf09449290bfcbf3 (diff)
downloadlinux-3512a18cbd8d09e22a790540cb9624c3c49827ba.tar.bz2
mailbox: xgene-slimpro: Fix potential NULL pointer dereference
There is a potential execution path in which function platform_get_resource() returns NULL. If this happens, we will end up having a NULL pointer dereference. Fix this by replacing devm_ioremap with devm_ioremap_resource, which has the NULL check and the memory region request. This code was detected with the help of Coccinelle. Cc: stable@vger.kernel.org Fixes: f700e84f417b ("mailbox: Add support for APM X-Gene platform mailbox driver") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox')
-rw-r--r--drivers/mailbox/mailbox-xgene-slimpro.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c
index a7040163dd43..b8b2b3533f46 100644
--- a/drivers/mailbox/mailbox-xgene-slimpro.c
+++ b/drivers/mailbox/mailbox-xgene-slimpro.c
@@ -195,9 +195,9 @@ static int slimpro_mbox_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, ctx);
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs));
- if (!mb_base)
- return -ENOMEM;
+ mb_base = devm_ioremap_resource(&pdev->dev, regs);
+ if (IS_ERR(mb_base))
+ return PTR_ERR(mb_base);
/* Setup mailbox links */
for (i = 0; i < MBOX_CNT; i++) {