From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3291DC43334 for ; Wed, 13 Jul 2022 14:12:08 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Ljfh63tWZz3dr6 for ; Thu, 14 Jul 2022 00:12:06 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=126.com header.i=@126.com header.a=rsa-sha256 header.s=s110527 header.b=eRNaledZ; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=126.com (client-ip=123.126.96.3; helo=mail-m963.mail.126.com; envelope-from=sohu0106@126.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=126.com header.i=@126.com header.a=rsa-sha256 header.s=s110527 header.b=eRNaledZ; dkim-atps=neutral X-Greylist: delayed 1808 seconds by postgrey-1.36 at boromir; Thu, 14 Jul 2022 00:11:20 AEST Received: from mail-m963.mail.126.com (mail-m963.mail.126.com [123.126.96.3]) by lists.ozlabs.org (Postfix) with ESMTP id 4LjfgD1ryCz3c4N for ; Thu, 14 Jul 2022 00:11:15 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=126.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=NuxF7 abVaAXpTR2vWD1m9eXdLM6T1n7ZReTYZWrnKR0=; b=eRNaledZLy1gEh+0mA8/a e8oq3Uq9vQW0/X8QQqYf5QMyiMqkqdQchRlNyqJ3Z64Cjil3yBR1GaE9ja4uiDlB tjYuGVq/i/ijzL9Rz7gxYcuwhKYWEaN+hVffmTGx5MuB/DcaNLYMoFlm6OLpgH6X RbJwbaot722Z8ixbuFYFP0= Received: from test.pnp.gw (unknown [218.247.43.97]) by smtp8 (Coremail) with SMTP id NORpCgDnRJlWy85iJGpLHw--.54378S2; Wed, 13 Jul 2022 21:40:40 +0800 (CST) From: NAME To: benh@kernel.crashing.org, sohu0106@126.com Subject: [PATCH] macintosh:fix oob read in do_adb_query function Date: Wed, 13 Jul 2022 21:40:37 +0800 Message-Id: <20220713134037.2331-1-sohu0106@126.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: NORpCgDnRJlWy85iJGpLHw--.54378S2 X-Coremail-Antispam: 1Uf129KBjvdXoW7JFWUAr17CrWxtw15AF15XFb_yoWfKwcE9w 4rKr4Iqw45C3s7GrnFkayI9Fy0yF97ur48Cry09FZxAFyDZay7KryvvrnrKFn7ZF4UCFZx GF4jg3s8Aw1vgjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRHc_ftUUUUU== X-Originating-IP: [218.247.43.97] X-CM-SenderInfo: pvrk3iqrqwqiyswou0bp/1tbiuBg9HmJVkVllGgABsC X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: security@kernel.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: sohu0106 In do_adb_query function of drivers/macintosh/adb.c, req->data is copy form userland. The parameter "req->data[2]" is Missing check, the array size of adb_handler[] is 16, so "adb_handler[req->data[2]]. original_address" and "adb_handler[req->data[2]]. handler_id" will lead to oob read. Signed-off-by: sohu0106 --- drivers/macintosh/adb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c index 439fab4eaa85..1bbb9ca08d40 100644 --- a/drivers/macintosh/adb.c +++ b/drivers/macintosh/adb.c @@ -647,7 +647,7 @@ do_adb_query(struct adb_request *req) switch(req->data[1]) { case ADB_QUERY_GETDEVINFO: - if (req->nbytes < 3) + if (req->nbytes < 3 || req->data[2] >= 16) break; mutex_lock(&adb_handler_mutex); req->reply[0] = adb_handler[req->data[2]].original_address; -- 2.25.1