From: Greg KH <gregkh@linuxfoundation.org>
To: syzbot <syzbot+45b2f40f0778cfa7634e@syzkaller.appspotmail.com>,
Michael Hund <mhund@ld-didactic.de>
Cc: akpm@linux-foundation.org, andreyknvl@google.com, cai@lca.pw,
keescook@chromium.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-usb@vger.kernel.org,
syzkaller-bugs@googlegroups.com, tglx@linutronix.de
Subject: Re: BUG: bad usercopy in ld_usb_read
Date: Thu, 8 Aug 2019 14:46:54 +0200 [thread overview]
Message-ID: <20190808124654.GB32144@kroah.com> (raw)
In-Reply-To: <0000000000005c056c058f9a5437@google.com>
On Thu, Aug 08, 2019 at 05:38:06AM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: e96407b4 usb-fuzzer: main usb gadget fuzzer driver
> git tree: https://github.com/google/kasan.git usb-fuzzer
> console output: https://syzkaller.appspot.com/x/log.txt?x=13aeaece600000
> kernel config: https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e
> dashboard link: https://syzkaller.appspot.com/bug?extid=45b2f40f0778cfa7634e
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>
> Unfortunately, I don't have any reproducer for this crash yet.
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+45b2f40f0778cfa7634e@syzkaller.appspotmail.com
>
> ldusb 6-1:0.124: Read buffer overflow, -131383996186150 bytes dropped
That's a funny number :)
Nice overflow found, I see you are now starting to fuzz the char device
nodes of usb drivers...
Michael, care to fix this up?
thanks,
greg k-h
next prev parent reply other threads:[~2019-08-08 12:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-08 12:38 syzbot
2019-08-08 12:46 ` Greg KH [this message]
2019-08-08 23:06 ` Kees Cook
2019-08-09 8:55 ` Greg KH
2019-08-09 15:13 ` Alan Stern
2019-08-10 18:23 ` Kees Cook
2019-08-10 18:15 ` syzbot
2019-08-12 12:06 ` Andrey Konovalov
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