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Date:      Mon, 4 Aug 2025 23:14:59 +0300
From:      Konstantin Belousov <kostikbel@gmail.com>
To:        Alexander Leidinger <Alexander@leidinger.net>
Cc:        Current <current@freebsd.org>
Subject:   Re: panic: fsync: vnode is not exclusive locked but should be
Message-ID:  <aJEUw2PURzIh_bIi@kib.kiev.ua>
In-Reply-To: <879c4b3b4daa32dd7b975640f18b6103@Leidinger.net>

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On Mon, Aug 04, 2025 at 08:50:45PM +0200, Alexander Leidinger wrote:
> Hi,
> 
> I have a crash with todays -current:
> ---snip---
> [435] VNASSERT failed: locked not true at
> /space/system/usr_src/sys/kern/vfs_subr.c:5795 (assert_vop_elocked)
> [435] 0xfffff806746f2000: type VREG state VSTATE_CONSTRUCTED op
> 0xffffffff835474f8
> [435]     usecount 1, writecount 1, refcount 1 seqc users 0
> [435]     hold count flags ()
> [435]     flags ()
> [435]     v_object 0xfffff80bd3abf0f8 ref 0 pages 0 cleanbuf 0 dirtybuf 0
> [435]     lock type zfs: SHARED (count 1)
> [435]   vp=0xfffff806746f2000, lowervp=0xfffff806749bd370
> [435] panic: fsync: vnode is not exclusive locked but should be

This is nullfs over zfs.  Try https://reviews.freebsd.org/D51730.
It should fix the issue, but I did not tested.


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