linux-kernel - Re: general protection fault in devlink_get_from

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Date:   Mon, 7 Oct 2019 12:16:16 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     syzbot <syzbot+896295c817162503d359@...kaller.appspotmail.com>,
        davem@...emloft.net, jiri@...lanox.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: general protection fault in devlink_get_from_attrs

On Mon, Oct 07, 2019 at 09:11:02PM +0200, Jiri Pirko wrote:
> Mon, Oct 07, 2019 at 08:59:11PM CEST, syzbot+896295c817162503d359@...kaller.appspotmail.com wrote:
> >Hello,
> >
> >syzbot found the following crash on:
> >
> >HEAD commit:    056ddc38 Merge branch 'stmmac-next'
> >git tree:       net-next
> >console output: https://syzkaller.appspot.com/x/log.txt?x=1590218f600000
> >kernel config:  https://syzkaller.appspot.com/x/.config?x=d9be300620399522
> >dashboard link: https://syzkaller.appspot.com/bug?extid=896295c817162503d359
> >compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> >syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10a6a6c3600000
> >C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15fd50dd600000
> >
> >IMPORTANT: if you fix the bug, please add the following tag to the commit:
> >Reported-by: syzbot+896295c817162503d359@...kaller.appspotmail.com
> >
> >kasan: CONFIG_KASAN_INLINE enabled
> >kasan: GPF could be caused by NULL-ptr deref or user memory access
> >general protection fault: 0000 [#1] PREEMPT SMP KASAN
> >CPU: 1 PID: 8790 Comm: syz-executor447 Not tainted 5.4.0-rc1+ #0
> >Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> >Google 01/01/2011
> >RIP: 0010:devlink_get_from_attrs+0x32/0x300 net/core/devlink.c:124
> 
> This is fixed already by:
> 5c23afb980b2 ("net: devlink: fix reporter dump dumpit")
> 

Great, let's tell syzbot so that it will close this bug report:

#syz fix: net: devlink: fix reporter dump dumpit

(It's actually commit 82a843de41d42, by the way.)

- Eric