From nobody Fri Nov 12 23:04:19 2021 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id F1A0D184FCB3; Fri, 12 Nov 2021 23:04:19 +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 4HrZ0M36zmz4RVd; Fri, 12 Nov 2021 23:04:19 +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 2BB55433; Fri, 12 Nov 2021 23:04:19 +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 1ACN4JTE062657; Fri, 12 Nov 2021 23:04:19 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 1ACN4JsK062656; Fri, 12 Nov 2021 23:04:19 GMT (envelope-from git) Date: Fri, 12 Nov 2021 23:04:19 GMT Message-Id: <202111122304.1ACN4JsK062656@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Konstantin Belousov Subject: git: d1d675cb304c - main - freevnode(): lock the freeing vnode around destroy_vpollinfo() List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-all@freebsd.org X-BeenThere: dev-commits-src-all@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kib X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: d1d675cb304c3cca824fbc9f932dc9d655b1ad24 Auto-Submitted: auto-generated X-ThisMailContainsUnwantedMimeParts: N The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=d1d675cb304c3cca824fbc9f932dc9d655b1ad24 commit d1d675cb304c3cca824fbc9f932dc9d655b1ad24 Author: Konstantin Belousov AuthorDate: 2021-11-02 02:49:13 +0000 Commit: Konstantin Belousov CommitDate: 2021-11-12 23:01:02 +0000 freevnode(): lock the freeing vnode around destroy_vpollinfo() to satisfy locking requirements of knlist manipulations. Reported and tested by: pho Reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D32761 --- sys/kern/vfs_subr.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index 181d0004e940..c0214e570628 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -1896,7 +1896,9 @@ freevnode(struct vnode *vp) mac_vnode_destroy(vp); #endif if (vp->v_pollinfo != NULL) { + vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); destroy_vpollinfo(vp->v_pollinfo); + VOP_UNLOCK(vp); vp->v_pollinfo = NULL; } vp->v_mountedhere = NULL;