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From: Al Viro <>
To: syzbot <>
Subject: Re: general protection fault in ucma_connect
Date: Sat, 17 Mar 2018 00:21:14 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Fri, Mar 16, 2018 at 04:59:02PM -0700, syzbot wrote:
> Hello,
> syzbot hit the following crash on upstream commit
> e2c15aff5f353ba80bd3bb49840837f65fa5cc43 (Thu Mar 15 18:07:35 2018 +0000)
> Merge tag 'sound-4.16-rc6' of
> git://
> So far this crash happened 2 times on upstream.
> C reproducer is attached.
> syzkaller reproducer is attached.
> Raw console output is attached.
> compiler: gcc (GCC) 7.1.1 20170620
> .config is attached.

May I politely inquire why am I getting Cc on the slew of ucma reports?
My last involvement with that thing that wouldn't have been absolutely
trivial had been back in 2012, and even that had been a conversion of
fget() to fdget() - nowhere near the areas implicated by those.  Anything
more recent would have no impact on the object code - replacement of
POLL{IN,RDNORM} with EPOLL{IN,RDNORM} (equal values on x86) and two
replacements of unsigned int with __poll_t, which is typedefed to

It's not that I've objections against helping to debug that thing (other
than general aversion to drivers/infinibarf), but I'm really curious -
just what got me volunteered from the syzbot POV?

Al, digging through tons of unpleasant code in fs/{config,debug}fs
at the moment...

      reply	other threads:[~2018-03-17  0:21 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-16 23:59 general protection fault in ucma_connect syzbot
2018-03-17  0:21 ` Al Viro [this message]

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