From nobody Fri Nov 12 23:04:16 2021 X-Original-To: dev-commits-src-main@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 CB11C184FC2F; Fri, 12 Nov 2021 23:04:18 +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 4HrZ0K3FTzz4RHB; Fri, 12 Nov 2021 23:04:17 +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 ED717432; Fri, 12 Nov 2021 23:04:16 +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 1ACN4GvO062609; Fri, 12 Nov 2021 23:04:16 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 1ACN4G8C062608; Fri, 12 Nov 2021 23:04:16 GMT (envelope-from git) Date: Fri, 12 Nov 2021 23:04:16 GMT Message-Id: <202111122304.1ACN4G8C062608@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: 25809a018db3 - main - mntfs: lock mntfs pseudo devfs vnode properly List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-main@freebsd.org X-BeenThere: dev-commits-src-main@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: 25809a018db3c9f3be838c10576d2bb070cc055a Auto-Submitted: auto-generated X-ThisMailContainsUnwantedMimeParts: N The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=25809a018db3c9f3be838c10576d2bb070cc055a commit 25809a018db3c9f3be838c10576d2bb070cc055a Author: Konstantin Belousov AuthorDate: 2021-11-01 12:28:32 +0000 Commit: Konstantin Belousov CommitDate: 2021-11-12 23:00:41 +0000 mntfs: lock mntfs pseudo devfs vnode properly Require devvp locked for mntfs_freevp(), to have it locked around vgone(). Make that true for ffs, which is the only consumer of the interface. 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/fs/mntfs/mntfs_vnops.c | 4 ++-- sys/ufs/ffs/ffs_vfsops.c | 4 ++++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/sys/fs/mntfs/mntfs_vnops.c b/sys/fs/mntfs/mntfs_vnops.c index 2708bc5d319f..4eb12a679590 100644 --- a/sys/fs/mntfs/mntfs_vnops.c +++ b/sys/fs/mntfs/mntfs_vnops.c @@ -89,7 +89,7 @@ mntfs_allocvp(struct mount *mp, struct vnode *ovp) void mntfs_freevp(struct vnode *vp) { - + ASSERT_VOP_ELOCKED(vp, "mntfs_freevp"); vgone(vp); - vrele(vp); + vput(vp); } diff --git a/sys/ufs/ffs/ffs_vfsops.c b/sys/ufs/ffs/ffs_vfsops.c index d9fb02c2bd58..bdaf4c98b090 100644 --- a/sys/ufs/ffs/ffs_vfsops.c +++ b/sys/ufs/ffs/ffs_vfsops.c @@ -928,6 +928,7 @@ ffs_mountfs(odevvp, mp, td) devvp = mntfs_allocvp(mp, odevvp); VOP_UNLOCK(odevvp); + vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); KASSERT(devvp->v_type == VCHR, ("reclaimed devvp")); dev = devvp->v_rdev; KASSERT(dev->si_snapdata == NULL, ("non-NULL snapshot data")); @@ -949,6 +950,7 @@ ffs_mountfs(odevvp, mp, td) BO_LOCK(&odevvp->v_bufobj); odevvp->v_bufobj.bo_flag |= BO_NOBUFS; BO_UNLOCK(&odevvp->v_bufobj); + VOP_UNLOCK(devvp); if (dev->si_iosize_max != 0) mp->mnt_iosize_max = dev->si_iosize_max; if (mp->mnt_iosize_max > maxphys) @@ -1233,6 +1235,7 @@ out: odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS; BO_UNLOCK(&odevvp->v_bufobj); atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0); + vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); mntfs_freevp(devvp); dev_rel(dev); return (error); @@ -1435,6 +1438,7 @@ ffs_unmount(mp, mntflags) ump->um_odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS; BO_UNLOCK(&ump->um_odevvp->v_bufobj); atomic_store_rel_ptr((uintptr_t *)&ump->um_dev->si_mountpt, 0); + vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); mntfs_freevp(ump->um_devvp); vrele(ump->um_odevvp); dev_rel(ump->um_dev);