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 4686612B176; Tue, 30 Apr 2024 11:01:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714474898; cv=none; b=P3Hg8N4tUMIIBZYtwMXzjpal7UpuQQlgOOt0iXm7pRYWZVCNKLutCEBgWHEqkfuJktg2YpkCpmdoD55rgRPNiUYtFzgACFaXgaymLVKPYILQ8ZvEnUQY7UnhmgJ00KiNWL83t9PFbgcHBRE9sZCdO8SYf3DM5uJZ0FDnDvwHEgE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714474898; c=relaxed/simple; bh=ysiiPAARKVaEcrrCtvDORgi838mxQJBzZr5gYqxW81o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Dves7lSINVuwOn+olH2yUM+1Q3Sj51pFO6lMJfb/Etlwljp0En4ULXdY2F5f6qs6NoG6ZoOVZsugqZaZomIo/fqWZ1tsNd0rX5frUxEtYJnAehfyr16hRRwncMLBi3YNQSQ78yRZfZGpsQFlt/W4KZ3qbqZLToz6UmYTGJ6nabA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=kfkS1k+H; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="kfkS1k+H" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C536CC2BBFC; Tue, 30 Apr 2024 11:01:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1714474898; bh=ysiiPAARKVaEcrrCtvDORgi838mxQJBzZr5gYqxW81o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kfkS1k+HNHTCUkYn6uTQdP0BQDY9TGQU0mqVTrdaVezr/l8ExznoA3QAR2k715aNf pQZd+NTwCGGrnHwKx3YRYB0laI4okJKiKTpqPphKQBmzt6gEDrz8bXKkg9YHiWEbO7 NtukQLICP2LcaHuDF2T/jG/k/QYKjh+SuYRWqNc8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mikhail Kobuk , Danilo Krummrich , Sasha Levin Subject: [PATCH 5.10 042/138] drm: nv04: Fix out of bounds access Date: Tue, 30 Apr 2024 12:38:47 +0200 Message-ID: <20240430103050.670747331@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240430103049.422035273@linuxfoundation.org> References: <20240430103049.422035273@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mikhail Kobuk [ Upstream commit cf92bb778eda7830e79452c6917efa8474a30c1e ] When Output Resource (dcb->or) value is assigned in fabricate_dcb_output(), there may be out of bounds access to dac_users array in case dcb->or is zero because ffs(dcb->or) is used as index there. The 'or' argument of fabricate_dcb_output() must be interpreted as a number of bit to set, not value. Utilize macros from 'enum nouveau_or' in calls instead of hardcoding. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 2e5702aff395 ("drm/nouveau: fabricate DCB encoder table for iMac G4") Fixes: 670820c0e6a9 ("drm/nouveau: Workaround incorrect DCB entry on a GeForce3 Ti 200.") Signed-off-by: Mikhail Kobuk Signed-off-by: Danilo Krummrich Link: https://patchwork.freedesktop.org/patch/msgid/20240411110854.16701-1-m.kobuk@ispras.ru Signed-off-by: Sasha Levin --- drivers/gpu/drm/nouveau/nouveau_bios.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c index d204ea8a5618e..5cdf0d8d4bc18 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bios.c +++ b/drivers/gpu/drm/nouveau/nouveau_bios.c @@ -23,6 +23,7 @@ */ #include "nouveau_drv.h" +#include "nouveau_bios.h" #include "nouveau_reg.h" #include "dispnv04/hw.h" #include "nouveau_encoder.h" @@ -1672,7 +1673,7 @@ apply_dcb_encoder_quirks(struct drm_device *dev, int idx, u32 *conn, u32 *conf) */ if (nv_match_device(dev, 0x0201, 0x1462, 0x8851)) { if (*conn == 0xf2005014 && *conf == 0xffffffff) { - fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 1, 1, 1); + fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 1, 1, DCB_OUTPUT_B); return false; } } @@ -1758,26 +1759,26 @@ fabricate_dcb_encoder_table(struct drm_device *dev, struct nvbios *bios) #ifdef __powerpc__ /* Apple iMac G4 NV17 */ if (of_machine_is_compatible("PowerMac4,5")) { - fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 0, all_heads, 1); - fabricate_dcb_output(dcb, DCB_OUTPUT_ANALOG, 1, all_heads, 2); + fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 0, all_heads, DCB_OUTPUT_B); + fabricate_dcb_output(dcb, DCB_OUTPUT_ANALOG, 1, all_heads, DCB_OUTPUT_C); return; } #endif /* Make up some sane defaults */ fabricate_dcb_output(dcb, DCB_OUTPUT_ANALOG, - bios->legacy.i2c_indices.crt, 1, 1); + bios->legacy.i2c_indices.crt, 1, DCB_OUTPUT_B); if (nv04_tv_identify(dev, bios->legacy.i2c_indices.tv) >= 0) fabricate_dcb_output(dcb, DCB_OUTPUT_TV, bios->legacy.i2c_indices.tv, - all_heads, 0); + all_heads, DCB_OUTPUT_A); else if (bios->tmds.output0_script_ptr || bios->tmds.output1_script_ptr) fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, bios->legacy.i2c_indices.panel, - all_heads, 1); + all_heads, DCB_OUTPUT_B); } static int -- 2.43.0