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 B78B85A7B8; Tue, 23 Jan 2024 01:45:50 +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=1705974350; cv=none; b=uhLFZfXb1+7dM20aeU1GCTWewsHNyFdS4Ud8FN9YEeintNy1aUm2/hKNPi3FIv+CCdEvisvYetkJi23iX0cT2pPRUR3hZnn3f9W+N58zG+900hItWgnl1OAVhPqmfK+q8eTlyNZZa0Ebmz6A8/5xDe3jjbZu95C5uzHeJkyqLhI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705974350; c=relaxed/simple; bh=WXKGPf0EKTDeshpwou60I3rhaS6fJ5AlRnHdTPw3gmA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ajBJ21kdunWBREvMk3oxySKUKCsHJMgW5BQTPFNRp4tsLCfJ6CHBk1cR7406TzP//Q8Qwoyx0RxNna7Odz0tjXqXOa/4u0O7PqdgzY95v29ydZ7nPqea8mobwLjtDer2DRnrsLZaREP3aJFP18Pjod2Rulo6Z+X161serPrt62o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=hBfDvI9R; 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="hBfDvI9R" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7D2B8C433C7; Tue, 23 Jan 2024 01:45:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1705974350; bh=WXKGPf0EKTDeshpwou60I3rhaS6fJ5AlRnHdTPw3gmA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hBfDvI9RT+ug1+8VawrINyXXTcUxnftkQZI7wggkwMo4Rx2ftWHXfjtoWCcvh4bUA qAjZnhhVReNj1XUtz4p/t1LpzwkQainA3k47nUtzSh1xJKjLiMBCH6I7i5C3rlqsrW HQ7/Ok60D8qjpPW0SfXCxitNydzoStmIefDtDYag= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nikita Zhandarovich , Alex Deucher , Sasha Levin Subject: [PATCH 5.15 187/374] drm/radeon/r600_cs: Fix possible int overflows in r600_cs_check_reg() Date: Mon, 22 Jan 2024 15:57:23 -0800 Message-ID: <20240122235751.126874678@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240122235744.598274724@linuxfoundation.org> References: <20240122235744.598274724@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nikita Zhandarovich [ Upstream commit 39c960bbf9d9ea862398759e75736cfb68c3446f ] While improbable, there may be a chance of hitting integer overflow when the result of radeon_get_ib_value() gets shifted left. Avoid it by casting one of the operands to larger data type (u64). Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE. Fixes: 1729dd33d20b ("drm/radeon/kms: r600 CS parser fixes") Signed-off-by: Nikita Zhandarovich Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/radeon/r600_cs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/r600_cs.c b/drivers/gpu/drm/radeon/r600_cs.c index 8be4799a98ef..6ade5dd470d5 100644 --- a/drivers/gpu/drm/radeon/r600_cs.c +++ b/drivers/gpu/drm/radeon/r600_cs.c @@ -1277,7 +1277,7 @@ static int r600_cs_check_reg(struct radeon_cs_parser *p, u32 reg, u32 idx) return -EINVAL; } tmp = (reg - CB_COLOR0_BASE) / 4; - track->cb_color_bo_offset[tmp] = radeon_get_ib_value(p, idx) << 8; + track->cb_color_bo_offset[tmp] = (u64)radeon_get_ib_value(p, idx) << 8; ib[idx] += (u32)((reloc->gpu_offset >> 8) & 0xffffffff); track->cb_color_base_last[tmp] = ib[idx]; track->cb_color_bo[tmp] = reloc->robj; @@ -1304,7 +1304,7 @@ static int r600_cs_check_reg(struct radeon_cs_parser *p, u32 reg, u32 idx) "0x%04X\n", reg); return -EINVAL; } - track->htile_offset = radeon_get_ib_value(p, idx) << 8; + track->htile_offset = (u64)radeon_get_ib_value(p, idx) << 8; ib[idx] += (u32)((reloc->gpu_offset >> 8) & 0xffffffff); track->htile_bo = reloc->robj; track->db_dirty = true; -- 2.43.0