From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EDB0D79C0 for ; Wed, 30 Nov 2022 18:42:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E330C433C1; Wed, 30 Nov 2022 18:42:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1669833761; bh=q2Ld8eZeF8pN943m2bD3B9oYPtCEkqbrEETlJgiQNEw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=flrbiXvLgWAByLJ3jMnrL+kskkZtHcsAqMc1QqCs6chm06wym4Nuw/KDzQxWdmS3O 9/+MwWGTn99j9Ukodhpe8PYk9LGj+7m/ip2VFPPdOcS3aEKjlPOX0+QtQ4DVGG8zL5 rK+uid+fI8KPs69HFzoq7bIHeX38fRXV1mErU2Nk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lyude Paul , Alex Deucher Subject: [PATCH 5.15 202/206] drm/amd/dc/dce120: Fix audio register mapping, stop triggering KASAN Date: Wed, 30 Nov 2022 19:24:14 +0100 Message-Id: <20221130180538.162575346@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221130180532.974348590@linuxfoundation.org> References: <20221130180532.974348590@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Lyude Paul 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 Cc: stable@vger.kernel.org Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- 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)\