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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