From 7e6d6f27522bcd037856234b720ff607b9c4a09b Mon Sep 17 00:00:00 2001 From: Srinivasan Shanmugam Date: Tue, 26 Dec 2023 15:32:19 +0530 Subject: [PATCH] drm/amdgpu: Fix possible NULL dereference in amdgpu_ras_query_error_status_helper() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit b8d55a90fd55b767c25687747e2b24abd1ef8680 upstream. Return invalid error code -EINVAL for invalid block id. Fixes the below: drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:1183 amdgpu_ras_query_error_status_helper() error: we previously assumed 'info' could be null (see line 1176) Suggested-by: Hawking Zhang Cc: Tao Zhou Cc: Hawking Zhang Cc: Christian König Cc: Alex Deucher Signed-off-by: Srinivasan Shanmugam Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher [Ajay: applied AMDGPU_RAS_BLOCK_COUNT condition to amdgpu_ras_query_error_status() as amdgpu_ras_query_error_status_helper() not present in v5.15 amdgpu_ras_query_error_status_helper() was introduced in 8cc0f5669eb6] Signed-off-by: Ajay Kaher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c index 439ea256ed25..c963b87014b6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c @@ -820,6 +820,9 @@ int amdgpu_ras_query_error_status(struct amdgpu_device *adev, if (!obj) return -EINVAL; + if (!info || info->head.block == AMDGPU_RAS_BLOCK_COUNT) + return -EINVAL; + switch (info->head.block) { case AMDGPU_RAS_BLOCK__UMC: if (adev->umc.ras_funcs &&