From: Lyude Paul lyude@redhat.com
commit 44035ec2fde1114254ee465f9ba3bb246b0b6283 upstream.
There's been a very long running bug that seems to have been neglected for a while, where amdgpu consistently triggers a KASAN error at start:
BUG: KASAN: global-out-of-bounds in read_indirect_azalia_reg+0x1d4/0x2a0 [amdgpu] Read of size 4 at addr ffffffffc2274b28 by task modprobe/1889
After digging through amd's rather creative method for accessing registers, I eventually discovered the problem likely has to do with the fact that on my dce120 GPU there are supposedly 7 sets of audio registers. But we only define a register mapping for 6 sets.
So, fix this and fix the KASAN warning finally.
Signed-off-by: Lyude Paul lyude@redhat.com Cc: stable@vger.kernel.org Reviewed-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c @@ -340,7 +340,8 @@ static const struct dce_audio_registers audio_regs(2), audio_regs(3), audio_regs(4), - audio_regs(5) + audio_regs(5), + audio_regs(6), };
#define DCE120_AUD_COMMON_MASK_SH_LIST(mask_sh)\