From owner-dev-commits-src-main@freebsd.org Fri May 21 09:25:37 2021 Return-Path: Delivered-To: dev-commits-src-main@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 3762F6555DD; Fri, 21 May 2021 09:25:37 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Fmh6S5nWWz3Brv; Fri, 21 May 2021 09:25:36 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id A08066C40; Fri, 21 May 2021 09:25:36 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 14L9Pa8b070820; Fri, 21 May 2021 09:25:36 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 14L9PahQ070819; Fri, 21 May 2021 09:25:36 GMT (envelope-from git) Date: Fri, 21 May 2021 09:25:36 GMT Message-Id: <202105210925.14L9PahQ070819@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Hans Petter Selasky Subject: git: c82c200622b5 - main - Accessing the epoch structure should happen after the INIT_CHECK(). Else the epoch pointer may be NULL. MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: hselasky X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: c82c200622b5380b8346de29879222538653f663 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-main@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for the main branch of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 21 May 2021 09:25:37 -0000 The branch main has been updated by hselasky: URL: https://cgit.FreeBSD.org/src/commit/?id=c82c200622b5380b8346de29879222538653f663 commit c82c200622b5380b8346de29879222538653f663 Author: Hans Petter Selasky AuthorDate: 2021-05-21 09:06:27 +0000 Commit: Hans Petter Selasky CommitDate: 2021-05-21 09:21:32 +0000 Accessing the epoch structure should happen after the INIT_CHECK(). Else the epoch pointer may be NULL. MFC after: 1 week Sponsored by: Mellanox Technologies // NVIDIA Networking --- sys/kern/subr_epoch.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sys/kern/subr_epoch.c b/sys/kern/subr_epoch.c index c5e4b78d8b79..798dbdc4360e 100644 --- a/sys/kern/subr_epoch.c +++ b/sys/kern/subr_epoch.c @@ -442,13 +442,14 @@ _epoch_enter_preempt(epoch_t epoch, epoch_tracker_t et EPOCH_FILE_LINE) struct thread *td; MPASS(cold || epoch != NULL); - MPASS(epoch->e_flags & EPOCH_PREEMPT); td = curthread; MPASS((vm_offset_t)et >= td->td_kstack && (vm_offset_t)et + sizeof(struct epoch_tracker) <= td->td_kstack + td->td_kstack_pages * PAGE_SIZE); INIT_CHECK(epoch); + MPASS(epoch->e_flags & EPOCH_PREEMPT); + #ifdef EPOCH_TRACE epoch_trace_enter(td, epoch, et, file, line); #endif