From: Denis Arefev <arefev@swemel.ru>
To: Harry Wentland <harry.wentland@amd.com>
Cc: "Leo Li" <sunpeng.li@amd.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"David Airlie" <airlied@linux.ie>,
"Daniel Vetter" <daniel@ffwll.ch>,
amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, trufanov@swemel.ru
Subject: [PATCH] amdgpu_dm_2027: Add pointer check
Date: Fri, 11 Nov 2022 10:14:46 +0300 [thread overview]
Message-ID: <20221111071446.22951-1-arefev@swemel.ru> (raw)
Return value of a function 'dc_create_state' is
dereferenced at amdgpu_dm.c:2027 without checking for null
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Denis Arefev <arefev@swemel.ru>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 0f7749e9424d..529483997154 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1960,7 +1960,9 @@ static int dm_resume(void *handle)
dc_release_state(dm_state->context);
dm_state->context = dc_create_state(dm->dc);
/* TODO: Remove dc_state->dccg, use dc->dccg directly. */
- dc_resource_state_construct(dm->dc, dm_state->context);
+ if (dm_state->context) {
+ dc_resource_state_construct(dm->dc, dm_state->context);
+ }
/* Before powering on DC we need to re-initialize DMUB. */
r = dm_dmub_hw_init(adev);
--
2.25.1
next reply other threads:[~2022-11-11 7:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-11 7:14 Denis Arefev [this message]
2022-11-11 15:05 ` Harry Wentland
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