The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
Possible dependencies:
6110a80f31b7 ("drm/amd/dc/dce120: Fix audio register mapping, stop triggering KASAN")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 6110a80f31b74773a28394259695513e0ac38406 Mon Sep 17 00:00:00 2001
From: Lyude Paul <lyude@xxxxxxxxxx>
Date: Mon, 14 Nov 2022 17:20:45 -0500
Subject: [PATCH] drm/amd/dc/dce120: Fix audio register mapping, stop
triggering KASAN
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>
diff --git a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
index 1b70b78e2fa1..af631085e88c 100644
--- a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
@@ -359,7 +359,8 @@ static const struct dce_audio_registers audio_regs[] = {
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)\
