Date: Fri, 01 May 2026 12:41:30 +0200 From: Alexander Leidinger <Alexander@Leidinger.net> To: =?UTF-8?Q?Jean-S=C3=A9bastien_P=C3=A9dron?= <dumbbell@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: openzfs panic: VERIFY3U(offset, <, dn->dn_datablksz) failed Message-ID: <5a9b7c0305461f51f9496e2e7ae62636@Leidinger.net> In-Reply-To: <07ab9cba-8089-4fd3-9bc7-31bbdbf0bffe@FreeBSD.org> References: <d41fa969c39062e325e1991616708a6d@Leidinger.net> <34C033D4-AC92-4E11-A130-AFFBAB6CCB45@FreeBSD.org> <07ab9cba-8089-4fd3-9bc7-31bbdbf0bffe@FreeBSD.org>
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Am 2026-04-30 20:12, schrieb Jean-Sébastien Pédron:
> On 25/04/2026 10:24, Kristof Provost wrote:
>> On 24 Apr 2026, at 14:18, Alexander Leidinger wrote:
>> recent current (last commit 2026-04-23-222413).
>>
>> short:
>> #3 0xffffffff805502f7 in vpanic (
>> fmt=0xffffffff82556d5d "VERIFY3U(offset, <, dn->dn_datablksz)
>> failed
>> (%llu < %llu)\n", ap=ap@entry=0xfffffe0228f57c70)
>> at /space/system/usr_src/sys/kern/kern_shutdown.c:974
>> buf = "VERIFY3U(offset, <, dn->dn_datablksz) failed
>> (9223372036854775807 < 24576)\n", '\000' <repeats 180 times>
>> __pc = 0x0
>> __pc = 0x0
>> __pc = 0x0
>> other_cpus = {__bits = {16777213, 0 <repeats 15 times>}}
>> td = 0xfffff80741b6e780
>> bootopt = <unavailable>
>> newpanic = <optimized out>
>>
>> I’m seeing the same panic (somewhat regularly, without obvious
>> trigger), so I’m fairly confident it’s not some obscure corruption in
>> your pool.
> I get it while working on RabbitMQ as well, 100% reproducible. I shared
> what I think I understand of the problem on the pull request that added
> POSIX_FADV_DONTNEED support:
> https://github.com/openzfs/zfs/pull/18399
>
> However, the patch I drafted, even though it does not cause the panic
> anymore, is incorrect as I misunderstood that code.
There is now https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294903
Bye,
Alexander.
--
http://www.Leidinger.net Alexander@Leidinger.net: PGP 0x8F31830F9F2772BF
http://www.FreeBSD.org netchild@FreeBSD.org : PGP 0x8F31830F9F2772BF
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