5.4-stable review patch. If anyone has any objections, please let me know.
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From: Bob Zhou bob.zhou@amd.com
commit 8b2faf1a4f3b6c748c0da36cda865a226534d520 upstream.
if the sdma_v4_0_irq_id_to_seq return -EINVAL, the process should be stop to avoid out-of-bounds read, so directly return -EINVAL.
Signed-off-by: Bob Zhou bob.zhou@amd.com Acked-by: Christian König christian.koenig@amd.com Reviewed-by: Le Ma le.ma@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c @@ -2007,6 +2007,9 @@ static int sdma_v4_0_process_trap_irq(st
DRM_DEBUG("IH: SDMA trap\n"); instance = sdma_v4_0_irq_id_to_seq(entry->client_id); + if (instance < 0) + return instance; + switch (entry->ring_id) { case 0: amdgpu_fence_process(&adev->sdma.instance[instance].ring);