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Date:      Thu, 12 Jun 2025 15:04:29 -0400
From:      mike tancsa <mike@sentex.net>
To:        FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org>
Subject:   Re: 14.3R zfs panic VERIFY3(zfs_btree_find(tree, node, &where) == NULL) failed (0xfffff80090dd93a0x == 0x)
Message-ID:  <6ff367d2-7684-4080-bf2d-dfb2b280d48c@sentex.net>
In-Reply-To: <19db4360-1846-4c6c-b8d1-ead546defc16@sentex.net>
References:  <0c989fde-2b33-442b-9e39-680f584baa7c@sentex.net> <19db4360-1846-4c6c-b8d1-ead546defc16@sentex.net>

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On 6/12/2025 11:47 AM, mike tancsa wrote:
> On 6/12/2025 7:12 AM, mike tancsa wrote:
>> Not sure if this is operator error or triggering a bug.   But my 
>> process worked fine with a 14.2R base image.
>>
> PR submitted
>
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287482
>

It seems to be just the .raw image that I can trigger the panic on. If I 
download the .qcow2 version its fine. I also tested the stable image 
from June 6 and its fine too

Its easy enough to test. On a machine, just

fetch 
https://download.freebsd.org/releases/VM-IMAGES/14.3-RELEASE/amd64/Latest/FreeBSD-14.3-RELEASE-amd64-zfs.raw.xz

xz -d FreeBSD-14.3-RELEASE-amd64-zfs.raw.xz

sh /usr/share/examples/bhyve/vmrun.sh -d 
./FreeBSD-14.3-RELEASE-amd64-zfs.raw -E -H vm0/host vm0


Login as root (no pass) and issue the command

periodic daily

root@freebsd:~ # periodic daily
panic: VERIFY3(zfs_btree_find(tree, node, &where) == NULL) failed 
(0xfffff800193009a0x == 0x)

cpuid = 0
time = 1749754869
KDB: stack backtrace:
#0 0xffffffff80ba8f1d at kdb_backtrace+0x5d
#1 0xffffffff80b5aa11 at vpanic+0x161
#2 0xffffffff82181c4a at spl_panic+0x3a
#3 0xffffffff821d4aae at zfs_btree_add+0x6e
#4 0xffffffff82315905 at zap_lockdir_impl+0x325
#5 0xffffffff823155a4 at zap_lockdir+0x84
#6 0xffffffff82318b15 at zap_cursor_retrieve+0x175
#7 0xffffffff821a01a3 at zfs_freebsd_readdir+0x383
#8 0xffffffff81112050 at VOP_READDIR_APV+0x20
#9 0xffffffff80c56a19 at kern_getdirentries+0x229
#10 0xffffffff80c56dc9 at sys_getdirentries+0x29
#11 0xffffffff8104e4c7 at amd64_syscall+0x117
#12 0xffffffff8102469b at fast_syscall_common+0xf8
Uptime: 45s
Automatic reboot in 15 seconds - press a key on the console to abort
--> Press a key on the console to reboot,
--> or switch off the system now.
fbuf frame buffer base: 0x3ed222400000 [sz 16777216]






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