git: 81c9a051ea35 - stable/13 - swap pager: lock vnode around VOP_CLOSE()

The branch stable/13 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=81c9a051ea35ff784437ba780399447154d56cfa

commit 81c9a051ea35ff784437ba780399447154d56cfa
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2021-11-23 09:16:53 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2021-12-02 02:21:14 +0000

    swap pager: lock vnode around VOP_CLOSE()
    
    (cherry picked from commit a6d04f34a4db6ff3fd5431ae10d4b877337fc138)
---
 sys/vm/swap_pager.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sys/vm/swap_pager.c b/sys/vm/swap_pager.c
index 6d64ff883966..38c225db51ee 100644
--- a/sys/vm/swap_pager.c
+++ b/sys/vm/swap_pager.c
@@ -3050,9 +3050,12 @@ swapdev_strategy(struct buf *bp, struct swdevt *sp)
 static void
 swapdev_close(struct thread *td, struct swdevt *sp)
 {
+	struct vnode *vp;
 
-	VOP_CLOSE(sp->sw_vp, FREAD | FWRITE, td->td_ucred, td);
-	vrele(sp->sw_vp);
+	vp = sp->sw_vp;
+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
+	VOP_CLOSE(vp, FREAD | FWRITE, td->td_ucred, td);
+	vput(vp);
 }
 
 static int