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41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
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From 9be5b16de622c2426408425e3df29e945cd21d37 Mon Sep 17 00:00:00 2001
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From: Kasin Li <donglil@codeaurora.org>
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Date: Wed, 22 Feb 2017 18:25:36 +0800
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Subject: drm/msm: Fix potential buffer overflow issue
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In function submit_create, if nr_cmds or nr_bos is assigned with
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negative value, the allocated buffer may be small than intended.
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Using this buffer will lead to buffer overflow issue.
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Change-Id: I0b61cccffd836e2dd3c859446470af4b6451b9ed
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Signed-off-by: Kasin Li <donglil@codeaurora.org>
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---
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drivers/gpu/drm/msm/msm_gem_submit.c | 7 +++++--
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1 file changed, 5 insertions(+), 2 deletions(-)
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diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
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index adbb0cb..fa9b641 100644
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--- a/drivers/gpu/drm/msm/msm_gem_submit.c
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+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
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@@ -34,12 +34,15 @@ static inline void __user *to_user_ptr(u64 address)
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}
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static struct msm_gem_submit *submit_create(struct drm_device *dev,
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- struct msm_gpu *gpu, int nr_cmds, int nr_bos)
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+ struct msm_gpu *gpu, uint32_t nr_cmds, uint32_t nr_bos)
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{
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struct msm_gem_submit *submit;
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- int sz = sizeof(*submit) + (nr_bos * sizeof(submit->bos[0])) +
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+ uint64_t sz = sizeof(*submit) + (nr_bos * sizeof(submit->bos[0])) +
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(nr_cmds * sizeof(submit->cmd[0]));
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+ if (sz > SIZE_MAX)
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+ return NULL;
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+
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submit = kmalloc(sz, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
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if (submit) {
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submit->dev = dev;
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--
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cgit v1.1
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