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 X-Spam-Level: X-Spam-Status: No, score=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1393C433B4 for ; Mon, 3 May 2021 16:50:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 849C361283 for ; Mon, 3 May 2021 16:50:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233416AbhECQvZ (ORCPT ); Mon, 3 May 2021 12:51:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:32774 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233816AbhECQta (ORCPT ); Mon, 3 May 2021 12:49:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7EEE661490; Mon, 3 May 2021 16:40:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620060023; bh=V6IcefS3Qw2+t7XZ7CSQUKs6/0wm+jf+MuAfSO+MeqY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rFtDQu39CpY4O9HWuhwjrHUAQ/Osop/LbuYJ315h5X9hkiNGGbwjnpqQlreLACcBp mhjA/ZmZJtdpt7+Lu419poihFE9Lni4DH1VModhrt6W6biBPa/vzHyQJ3mDE7oD9VC LYWu6nMOn2DxDIANRj0dSVfTSGsz10QyDjhrKmfJLkfsxJZ0ldAUkEVQST/uAqfRQP df8o1IThU1AFTIx/EMDIQG87AfP7W6QbdCNr5CYjGL/K2kTlaYGqIf/QYqVVdX5R6i sjWIA+mz0Vj3LcUL92OEKxC0lbhtY7gFnt7yc+v9YwJhXlgip2Gft6nXZEspPryEOU zEkC3xpm4RcXA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Quinn Tran , Himanshu Madhani , Saurav Kashyap , Nilesh Javali , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 27/57] scsi: qla2xxx: Fix use after free in bsg Date: Mon, 3 May 2021 12:39:11 -0400 Message-Id: <20210503163941.2853291-27-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210503163941.2853291-1-sashal@kernel.org> References: <20210503163941.2853291-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Quinn Tran [ Upstream commit 2ce35c0821afc2acd5ee1c3f60d149f8b2520ce8 ] On bsg command completion, bsg_job_done() was called while qla driver continued to access the bsg_job buffer. bsg_job_done() would free up resources that ended up being reused by other task while the driver continued to access the buffers. As a result, driver was reading garbage data. localhost kernel: BUG: KASAN: use-after-free in sg_next+0x64/0x80 localhost kernel: Read of size 8 at addr ffff8883228a3330 by task swapper/26/0 localhost kernel: localhost kernel: CPU: 26 PID: 0 Comm: swapper/26 Kdump: loaded Tainted: G OE --------- - - 4.18.0-193.el8.x86_64+debug #1 localhost kernel: Hardware name: HP ProLiant DL360 Gen9/ProLiant DL360 Gen9, BIOS P89 08/12/2016 localhost kernel: Call Trace: localhost kernel: localhost kernel: dump_stack+0x9a/0xf0 localhost kernel: print_address_description.cold.3+0x9/0x23b localhost kernel: kasan_report.cold.4+0x65/0x95 localhost kernel: debug_dma_unmap_sg.part.12+0x10d/0x2d0 localhost kernel: qla2x00_bsg_sp_free+0xaf6/0x1010 [qla2xxx] Link: https://lore.kernel.org/r/20210329085229.4367-6-njavali@marvell.com Reviewed-by: Himanshu Madhani Signed-off-by: Quinn Tran Signed-off-by: Saurav Kashyap Signed-off-by: Nilesh Javali Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/qla2xxx/qla_bsg.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c index cbaf178fc979..ce55121910e8 100644 --- a/drivers/scsi/qla2xxx/qla_bsg.c +++ b/drivers/scsi/qla2xxx/qla_bsg.c @@ -17,10 +17,11 @@ void qla2x00_bsg_job_done(srb_t *sp, int res) struct bsg_job *bsg_job = sp->u.bsg_job; struct fc_bsg_reply *bsg_reply = bsg_job->reply; + sp->free(sp); + bsg_reply->result = res; bsg_job_done(bsg_job, bsg_reply->result, bsg_reply->reply_payload_rcv_len); - sp->free(sp); } void qla2x00_bsg_sp_free(srb_t *sp) -- 2.30.2