kern/126287: [ufs] [panic] Kernel panics while mounting an UFS filesystem with snapshot enabled

[Kostik Belousov]

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 at gmail.com>
> To: bug-followup at 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 ;)
>  
>  Thanks,
>  --
>  Mateusz Guzik

The PR lacks the backtrace (preferrable the ddb output or "bt full" from
kgdb) for the panic. Please, show me the backtrace.
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