From owner-svn-src-head@freebsd.org Mon Apr 30 21:28:11 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E2ABDFB761C; Mon, 30 Apr 2018 21:28:10 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8A6296B742; Mon, 30 Apr 2018 21:28:10 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 8100E18AC7; Mon, 30 Apr 2018 21:28:10 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w3ULSAD1041009; Mon, 30 Apr 2018 21:28:10 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w3ULSAAt041008; Mon, 30 Apr 2018 21:28:10 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201804302128.w3ULSAAt041008@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Mon, 30 Apr 2018 21:28:10 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r333127 - head/sys/dev/nvme X-SVN-Group: head X-SVN-Commit-Author: mav X-SVN-Commit-Paths: head/sys/dev/nvme X-SVN-Commit-Revision: 333127 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Apr 2018 21:28:11 -0000 Author: mav Date: Mon Apr 30 21:28:10 2018 New Revision: 333127 URL: https://svnweb.freebsd.org/changeset/base/333127 Log: Fix use-after-free in nvme_qpair_destroy(). dma_tag_payload should not be destroyed before payload_dma_map, and seems it should be used there instead of dma_tag to match creation. Sponsored by: iXsystems, Inc. Modified: head/sys/dev/nvme/nvme_qpair.c Modified: head/sys/dev/nvme/nvme_qpair.c ============================================================================== --- head/sys/dev/nvme/nvme_qpair.c Mon Apr 30 20:29:28 2018 (r333126) +++ head/sys/dev/nvme/nvme_qpair.c Mon Apr 30 21:28:10 2018 (r333127) @@ -690,21 +690,22 @@ nvme_qpair_destroy(struct nvme_qpair *qpair) qpair->queuemem_map); } - if (qpair->dma_tag) - bus_dma_tag_destroy(qpair->dma_tag); - - if (qpair->dma_tag_payload) - bus_dma_tag_destroy(qpair->dma_tag_payload); - if (qpair->act_tr) free(qpair->act_tr, M_NVME); while (!TAILQ_EMPTY(&qpair->free_tr)) { tr = TAILQ_FIRST(&qpair->free_tr); TAILQ_REMOVE(&qpair->free_tr, tr, tailq); - bus_dmamap_destroy(qpair->dma_tag, tr->payload_dma_map); + bus_dmamap_destroy(qpair->dma_tag_payload, + tr->payload_dma_map); free(tr, M_NVME); } + + if (qpair->dma_tag) + bus_dma_tag_destroy(qpair->dma_tag); + + if (qpair->dma_tag_payload) + bus_dma_tag_destroy(qpair->dma_tag_payload); } static void