Patch "drm/amdgpu: Fix potential null pointer derefernce" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/amdgpu: Fix potential null pointer derefernce

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amdgpu-fix-potential-null-pointer-derefernce.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 471538063f6504a52529cf5304ebf301eac70a4b
Author: Stanley.Yang <Stanley.Yang@xxxxxxx>
Date:   Wed Sep 27 16:22:29 2023 +0800

    drm/amdgpu: Fix potential null pointer derefernce
    
    [ 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@xxxxxxx>
    Reviewed-by: Tao Zhou <tao.zhou1@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index f57334fff7fc8..19e32f38a4c45 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -5116,7 +5116,8 @@ 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();



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