Date: Mon, 08 Nov 2010 13:55:01 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org Subject: Re: another fuse panic Message-ID: <4CD7E515.5040209@icyb.net.ua> In-Reply-To: <ib8nas$9de$1@dough.gmane.org> References: <4CD7C8FC.900@icyb.net.ua> <ib8nas$9de$1@dough.gmane.org>
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on 08/11/2010 13:35 Ivan Voras said the following:
> On 11/08/10 10:55, Andriy Gapon wrote:
>>
>> JFYI.
>> Fatal trap 12: page fault while in kernel mode
>
> Can you find any set of circumstances which make this repeatable?
>
> This panic apparently goes like this:
>
> 1) used by devfs_open():
> 47 static struct cdevsw fuse_cdevsw = {
> 48 .d_open = fusedev_open,
>
> 2) in fusedev_open():
> 119 fdata = fdata_alloc(dev, td->td_ucred);
>
> 3) in fdata_alloc():
> 297 data->daemoncred = crhold(cred);
>
> in other words, td->td_ucred from td passed to fusedev_open (presumably
> when the device is opened from the userland) appears to be NULL.
>
> I don't know if there is any normal set of circumstances under which
> this is expected.
I reliable got this panic when all I was doing is saving an attachment in
thunderbird 3 that ran in KDE 4 environment. Not sure what was going on behind
the scenes, but shouldn't have been anything out of the ordinary.
--
Andriy Gapon
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