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openSUSE:Leap:42.3:Update
drm.7971
0177-drm-sti-sti_vtg-Handle-return-NULL-error-f...
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File 0177-drm-sti-sti_vtg-Handle-return-NULL-error-from-devm_i.patch of Package drm.7971
From 38fa955da2516bb8bf5f0a75041856016e524d7c Mon Sep 17 00:00:00 2001 From: Arvind Yadav <arvind.yadav.cs@gmail.com> Date: Wed, 21 Dec 2016 11:00:12 +0530 Subject: [PATCH] drm/sti: sti_vtg: Handle return NULL error from devm_ioremap_nocache [ Upstream commit 1ae0d5af347df224a6e76334683f13a96d915a44 ] Here, If devm_ioremap_nocache will fail. It will return NULL. Kernel can run into a NULL-pointer dereference. This error check will avoid NULL pointer dereference. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Acked-by: Vincent Abriou <vincent.abriou@st.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/gpu/drm/sti/sti_vtg.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/gpu/drm/sti/sti_vtg.c +++ b/drivers/gpu/drm/sti/sti_vtg.c @@ -429,6 +429,10 @@ static int vtg_probe(struct platform_dev return -ENOMEM; } vtg->regs = devm_ioremap_nocache(dev, res->start, resource_size(res)); + if (!vtg->regs) { + DRM_ERROR("failed to remap I/O memory\n"); + return -ENOMEM; + } np = of_parse_phandle(pdev->dev.of_node, "st,slave", 0); if (np) {
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