Date: Wed, 6 Aug 2008 14:00:02 GMT From: "Mateusz Guzik" <mjguzik@gmail.com> To: freebsd-fs@FreeBSD.org Subject: Re: kern/126287: [ufs] [panic] Kernel panics while mounting an UFS filesystem with snapshot enabled Message-ID: <200808061400.m76E028t034822@freefall.freebsd.org>
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The following reply was made to PR kern/126287; it has been noted by GNATS.
From: "Mateusz Guzik" <mjguzik@gmail.com>
To: "Kostik Belousov" <kostikbel@gmail.com>
Cc: freebsd-fs@freebsd.org, bug-followup@freebsd.org
Subject: Re: kern/126287: [ufs] [panic] Kernel panics while mounting an UFS filesystem with snapshot enabled
Date: Wed, 6 Aug 2008 15:52:24 +0200
2008/8/6 Kostik Belousov <kostikbel@gmail.com>:
> On Wed, Aug 06, 2008 at 10:20:05AM +0000, Mateusz Guzik wrote:
>> The following reply was made to PR kern/126287; it has been noted by GNATS.
>>
>> From: "Mateusz Guzik" <mjguzik@gmail.com>
>> To: bug-followup@freebsd.org
>> Cc:
>> Subject: Re: kern/126287: [ufs] [panic] Kernel panics while mounting an UFS filesystem with snapshot enabled
>> Date: Wed, 6 Aug 2008 12:15:00 +0200
>>
>> Something weird happened to my attachment, I'll paste it here:
>>
>> --- sys/kern/vfs_mount.c.orig 2008-08-06 11:14:16.000000000 +0200
>> +++ sys/kern/vfs_mount.c 2008-08-06 11:14:32.000000000 +0200
>> @@ -196,10 +196,13 @@
>> void
>> vfs_deleteopt(struct vfsoptlist *opts, const char *name)
>> {
>> struct vfsopt *opt, *temp;
>>
>> + if (opts == NULL)
>> + return;
>> +
>> TAILQ_FOREACH_SAFE(opt, opts, link, temp) {
>> if (strcmp(opt->name, name) == 0)
>> vfs_freeopt(opts, opt);
>> }
>> }
>>
>> Again, it should work fine ;)
>
> The PR lacks the backtrace (preferrable the ddb output or "bt full" from
> kgdb) for the panic. Please, show me the backtrace.
>
Sorry, I don't have currently access to fbsd 7, so here is backtrace
from CURRENT(crashed by mount -o snapshot /somefilesystem):
[..]
#11 0xc06e1e5b in calltrap () at
/srv/build/CURRENT/src/sys/i386/i386/exception.s:165
#12 0xc05c86d4 in vfs_deleteopt (opts=0x0, name=0xc074ef52 "snapshot")
at /srv/build/CURRENT/src/sys/kern/vfs_mount.c:195
#13 0xc068d689 in ffs_mount (mp=0xc29f52a0, td=0xc2875af0) at
/srv/build/CURRENT/src/sys/ufs/ffs/ffs_vfsops.c:172
#14 0xc05cb1d8 in vfs_donmount (td=0xc2875af0, fsflags=0,
fsoptions=0xc261db80) at /srv/build/CURRENT/src/sys/kern/vfs_mount.c:1010
#15 0xc05cc3bb in nmount (td=0xc2875af0, uap=0xcd3a7cf8) at
/srv/build/CURRENT/src/sys/kern/vfs_mount.c:417
#16 0xc06f9157 in syscall (frame=0xcd3a7d38) at
/srv/build/CURRENT/src/sys/i386/i386/trap.c:1081
#17 0xc06e1ef0 in Xint0x80_syscall () at
/srv/build/CURRENT/src/sys/i386/i386/exception.s:261
Thanks,
--
Mateusz Guzik
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