Commit ac2ccb2f authored Jun 04, 2024 by Stanley.Yang Committed by Liu Shixin Jun 04, 2024

drm/amdgpu: Fix potential null pointer derefernce

stable inclusion
from stable-v5.10.202
commit b93a25de28af153312f0fc979b0663fc4bd3442b
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RE5O
CVE: CVE-2023-52814

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b93a25de28af153312f0fc979b0663fc4bd3442b



--------------------------------

[ Upstream commit 80285ae1ec8717b597b20de38866c29d84d321a1 ]

The amdgpu_ras_get_context may return NULL if device
not support ras feature, so add check before using.

Signed-off-by: Stanley.Yang <Stanley.Yang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>
Signed-off-by: Liu Shixin <liushixin2@huawei.com>

parent ff7390bf

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -4523,7 +4523,8 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
		* Flush RAM to disk so that after reboot
		* the user can read log and see why the system rebooted.
		*/
		if (need_emergency_restart && amdgpu_ras_get_context(adev)->reboot) {
		if (need_emergency_restart && amdgpu_ras_get_context(adev) &&
		amdgpu_ras_get_context(adev)->reboot) {
		DRM_WARN("Emergency reboot.");

		ksys_sync_helper();