Date: Mon, 21 Feb 2022 13:07:44 +0000 From: Michael Jung <mikej@paymentallianceintl.com> To: Hans Petter Selasky <hps@selasky.org>, freebsd-current <freebsd-current@freebsd.org> Subject: RE: New panic in main-n253273-a52d8d4a6c6: Message-ID: <6fcc161dd23b4f7ebe7cc789f11c017e@MAIL-HUB.pai.local> In-Reply-To: <d04c0d93-8168-f53a-a5fd-865a1f6d2486@selasky.org> References: <b7ca5b5e7a9a4df3951a2cb2f1d63552@MAIL-HUB.pai.local> <d04c0d93-8168-f53a-a5fd-865a1f6d2486@selasky.org>
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<BR>
-----Original Message-----<BR>
From: <a href=3D"mailto:owner-freebsd-current@freebsd.org">owner-freebsd-cu=
rrent@freebsd.org</a> [mailto:owner-freebsd-current@freebsd.org] On Behalf =
Of Hans Petter Selasky<BR>
Sent: Monday, February 21, 2022 2:48 AM<BR>
To: Michael Jung <mikej@paymentallianceintl.com>; freebsd-current <=
;freebsd-current@freebsd.org><BR>
Subject: Re: New panic in main-n253273-a52d8d4a6c6:<BR>
<BR>
On 2/20/22 21:53, Michael Jung wrote:<BR>
> Hi!<BR>
><BR>
> The box was quite busy at the time. The only odd thing I am aware of<=
BR>
> and which I do not think is related is I have not been able to expand<=
BR>
> one of my zpool's. ZFS sees my added draid2:2d:10c:0s vdev but I<BR>
> can't seem to force zpool's expansion - my bet this is somehow related=
<BR>
> to the mirrored special device in the pool even though autoexpand is s=
et to 'on' for the pool.<BR>
><BR>
> Not asking anyone to solve this, I plan on putting together a "ho=
w to<BR>
> reproduce" and post to freebsd-fs@ but wanted to note this oddity=
.<BR>
><BR>
> --mikej<BR>
><BR>
> This is a unmodified GENERIC kernel.<BR>
><BR>
><BR>
> Unread portion of the kernel message buffer:<BR>
> panic: refcount 0xfffff801cc119284 wraparound cpuid =3D 7 time =3D<BR>
> 1645382575<BR>
> KDB: stack backtrace:<BR>
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame<BR>
> 0xfffffe0119a83c80<BR>
> vpanic() at vpanic+0x17f/frame 0xfffffe0119a83cd0<BR>
> panic() at panic+0x43/frame 0xfffffe0119a83d30<BR>
> fdclose() at fdclose/frame 0xfffffe0119a83dc0<BR>
> closefp_impl() at closefp_impl+0x77/frame 0xfffffe0119a83e00<BR>
> amd64_syscall() at amd64_syscall+0x12e/frame 0xfffffe0119a83f30<BR>
> fast_syscall_common() at fast_syscall_common+0xf8/frame<BR>
> 0xfffffe0119a83f30<BR>
> --- syscall (6, FreeBSD ELF64, sys_close), rip =3D 0x3309a531b62a, rsp=
=3D<BR>
> 0x3309a2802bc8, rbp =3D 0x3309a2803000 ---<BR>
> KDB: enter: panic<BR>
><BR>
<BR>
This may be a refcount leak. Are you able to dump "fdp" at:<BR>
<BR>
#16 0xffffffff80bad587 in closefp_impl (fdp=3D0xfffffe012b7c0430, fd=3D4,<B=
R>
fp=3D0xfffff801cc119280, td=3D0xfffffe00df8d0560, audit=3Dtrue)<BR>
at /usr/src/sys/kern/kern_descrip.c:1300<BR>
<BR>
frame 16<BR>
print /x *fdp<BR>
<BR>
--HPS<BR>
<BR>
<BR>
[root@draid /var/crash]# kgdb kernel.full.0 vmcore.0<BR>
GNU gdb (GDB) 11.2 [GDB v11.2 for FreeBSD]<BR>
Copyright (C) 2022 Free Software Foundation, Inc.<BR>
License GPLv3+: GNU GPL version 3 or later <<a href=3D"http://gnu.org/li=
censes/gpl.html" target=3D"_blank">http://gnu.org/licenses/gpl.html</a>>=
<BR>
This is free software: you are free to change and redistribute it.<BR>
There is NO WARRANTY, to the extent permitted by law.<BR>
Type "show copying" and "show warranty" for details.<BR=
>
This GDB was configured as "x86_64-portbld-freebsd14.0".<BR>
Type "show configuration" for configuration details.<BR>
For bug reporting instructions, please see:<BR>
<https://www.gnu.org/software/gdb/bugs/>.<BR>;
Find the GDB manual and other documentation resources online at:<BR>
<http://www.gnu.org/software/gdb/documentation/>.<BR>;
<BR>
For help, type "help".<BR>
Type "apropos word" to search for commands related to "word&=
quot;...<BR>
Reading symbols from kernel.full.0...<BR>
<BR>
Unread portion of the kernel message buffer:<BR>
panic: refcount 0xfffff801cc119284 wraparound<BR>
cpuid =3D 7<BR>
time =3D 1645382575<BR>
KDB: stack backtrace:<BR>
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0119a83=
c80<BR>
vpanic() at vpanic+0x17f/frame 0xfffffe0119a83cd0<BR>
panic() at panic+0x43/frame 0xfffffe0119a83d30<BR>
fdclose() at fdclose/frame 0xfffffe0119a83dc0<BR>
closefp_impl() at closefp_impl+0x77/frame 0xfffffe0119a83e00<BR>
amd64_syscall() at amd64_syscall+0x12e/frame 0xfffffe0119a83f30<BR>
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0119a83f30<=
BR>
--- syscall (6, FreeBSD ELF64, sys_close), rip =3D 0x3309a531b62a, rsp =3D =
0x3309a2802bc8, rbp =3D 0x3309a2803000 ---<BR>
KDB: enter: panic<BR>
<BR>
__curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55<BR>
55 __asm("movq %%gs:%P1,%0" : "=3Dr" (td) =
: "n" (offsetof(struct pcpu,<BR>
<BR>
(kgdb) fram 16<BR>
#16 0xffffffff80bad587 in closefp_impl (fdp=3D0xfffffe012b7c0430, fd=3D4, f=
p=3D0xfffff801cc119280, td=3D0xfffffe00df8d0560, audit=3Dtrue) at /usr/src/=
sys/kern/kern_descrip.c:1300<BR>
1300 error =3D closef(fp, td);<BR>
<BR>
(kgdb) print /x *fdp<BR>
$1 =3D {fd_files =3D 0xfffffe00df6d9000, fd_map =3D 0xfffff80001bb1800, fd_=
freefile =3D 0x4, fd_refcnt =3D 0x1, fd_holdcnt =3D 0x1, fd_sx =3D {lock_ob=
ject =3D {lo_name =3D 0xffffffff8124f6a9, lo_flags =3D 0x2330000, lo_data =
=3D 0x0,<BR>
lo_witness =3D 0xfffff8041eb94000}, sx_lock =3D 0x1}, fd_kqlist =3D {=
tqh_first =3D 0x0, tqh_last =3D 0x0}, fd_holdleaderscount =3D 0x0, fd_holdl=
eaderswakeup =3D 0x0}<BR>
(kgdb)<BR>
<BR>
<BR>
<BR>
<BR>
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