From 9e951d6b4b708fad9993aca0a1cede1c74d735e0 Mon Sep 17 00:00:00 2001
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sun, 31 Dec 2023 22:46:53 +0200
Subject: [PATCH] vtruncbuf: improve the check for meta buffer

(cherry picked from commit 2d33ad48bd37f27925e4c46c798f8f2d23a2b501)
---
 sys/kern/vfs_subr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index 8cc4a57cdafb..3928cde7a719 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -2563,7 +2563,7 @@ vtruncbuf(struct vnode *vp, off_t length, int blksize)
 		 */
 restartsync:
 		TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
-			if (bp->b_lblkno > 0)
+			if (bp->b_lblkno >= 0)
 				continue;
 			/*
 			 * Since we hold the vnode lock this should only