Date: Mon, 2 Sep 2019 15:24:26 +0000 (UTC) From: Mateusz Guzik <mjg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r351702 - head/sys/kern Message-ID: <201909021524.x82FOQZO033532@repo.freebsd.org>
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Author: mjg Date: Mon Sep 2 15:24:25 2019 New Revision: 351702 URL: https://svnweb.freebsd.org/changeset/base/351702 Log: vfs: restore mp null check in vop_stdgetwritemount The initially read mount point can already be NULL. Reported by: markj Fixes: r351656 ("vfs: stop refing freed mount points in vop_stdgetwritemount") Sponsored by: The FreeBSD Foundation Modified: head/sys/kern/vfs_default.c Modified: head/sys/kern/vfs_default.c ============================================================================== --- head/sys/kern/vfs_default.c Mon Sep 2 14:51:59 2019 (r351701) +++ head/sys/kern/vfs_default.c Mon Sep 2 15:24:25 2019 (r351702) @@ -601,6 +601,8 @@ vop_stdgetwritemount(ap) */ vp = ap->a_vp; mp = vp->v_mount; + if (mp == NULL) + goto out; MNT_ILOCK(mp); if (mp != vp->v_mount) { MNT_IUNLOCK(mp);
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