From: "Theodore Ts'o" <tytso@mit.edu>
To: Calvin Owens <jcalvinowens@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Arnd Bergmann <arnd@arndb.de>,
linux-kernel@vger.kernel.org
Subject: Re: BUG: drivers/char/random.c:986
Date: Fri, 29 Aug 2014 07:26:55 -0400 [thread overview]
Message-ID: <20140829112655.GB20278@thunk.org> (raw)
In-Reply-To: <20140829050150.GA3011@gmail.com>
On Thu, Aug 28, 2014 at 10:01:50PM -0700, Calvin Owens wrote:
> Hello all,
>
> I hit this BUG_ON() on my laptop a few days ago: http://i.imgur.com/N1GQeJW.jpg
>
> In the current upstream, this corresponds to line 1022:
>
> BUG_ON(r->entropy_count > r->poolinfo->poolfracbits);
>
> It triggered when I executed `dd if=/dev/urandom of=file bs=N count=1`
> while watching a YouTube video in Chromium. I don't recall the exact value of
> N I used, but it was rather large (>50M), and a few bytes past an even power
> of two (I was creating a file to test an HTTP upload script I was working on).
>
> I haven't had any luck reproducing this on the current upstream or the version
> it was originally triggered on.
Known bug, fixed in 79a8468747c5 which landed in mainline as of
3.16-rc6. And you were running 3.16-rc4. (BTW, in the future it
would be nice if you mentioned the kernel version you were running in;
I found it by looking at the jpg, but it's always more convenient to
be able to read it in ASCII. :-)
Cheers,
- Ted
prev parent reply other threads:[~2014-08-29 11:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-29 5:01 BUG: drivers/char/random.c:986 Calvin Owens
2014-08-29 11:26 ` Theodore Ts'o [this message]
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