From 6142aa066061919a436c34c8a182674b48636311 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Wed, 22 Oct 2025 14:03:24 +0300 Subject: [PATCH] drm/amdgpu/userqueue: Fix use after free in amdgpu_userq_buffer_vas_list_cleanup() The amdgpu_userq_buffer_va_list_del() function frees "va_cursor" but it is dereferenced on the next line when we print the debug message. Print the debug message first and then free it. Fixes: 2a28f9665dca ("drm/amdgpu: track the userq bo va for its obj management") Signed-off-by: Dan Carpenter Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c index 9d4751a39c20d..2200e0bbf040a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c @@ -159,9 +159,9 @@ static int amdgpu_userq_buffer_vas_list_cleanup(struct amdgpu_device *adev, r = -EINVAL; goto err; } - amdgpu_userq_buffer_va_list_del(mapping, va_cursor); dev_dbg(adev->dev, "delete the userq:%p va:%llx\n", queue, va_cursor->gpu_addr); + amdgpu_userq_buffer_va_list_del(mapping, va_cursor); } err: amdgpu_bo_unreserve(queue->vm->root.bo); -- 2.47.3