This is a note to let you know that I've just added the patch titled drm/amd/dc/dce120: Fix audio register mapping, stop triggering KASAN 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-amd-dc-dce120-fix-audio-register-mapping-stop-triggering-kasan.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. >From 44035ec2fde1114254ee465f9ba3bb246b0b6283 Mon Sep 17 00:00:00 2001 From: Lyude Paul <lyude@xxxxxxxxxx> Date: Mon, 14 Nov 2022 17:20:45 -0500 Subject: drm/amd/dc/dce120: Fix audio register mapping, stop triggering KASAN From: Lyude Paul <lyude@xxxxxxxxxx> 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@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 @@ -361,7 +361,8 @@ 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)\ Patches currently in stable-queue which might be from lyude@xxxxxxxxxx are queue-5.15/drm-amd-dc-dce120-fix-audio-register-mapping-stop-triggering-kasan.patch