linux-kernel - Re: INFO: rcu detected stall in is_bpf_text

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Date:   Sat, 19 May 2018 22:45:44 -0300
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     syzbot <syzbot+3dcd59a1f907245f891f@...kaller.appspotmail.com>,
        ast@...nel.org, daniel@...earbox.net, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        Xin Long <lucien.xin@...il.com>
Subject: Re: INFO: rcu detected stall in is_bpf_text_address

On Sat, May 19, 2018 at 08:57:19AM -0700, Eric Dumazet wrote:
> SCTP experts, please take a look.

Ugh, same sctp footprint as in the other reports.

>
> >  _sctp_make_chunk+0x58/0x280 net/sctp/sm_make_chunk.c:1417
> >  sctp_make_control net/sctp/sm_make_chunk.c:1464 [inline]
> >  sctp_make_heartbeat+0x8f/0x430 net/sctp/sm_make_chunk.c:1177
> >  sctp_sf_heartbeat.isra.23+0x26/0x180 net/sctp/sm_statefuns.c:1005
> >  sctp_sf_sendbeat_8_3+0x38e/0x550 net/sctp/sm_statefuns.c:1049
> >  sctp_do_sm+0x1ab/0x7160 net/sctp/sm_sideeffect.c:1188
> >  sctp_generate_heartbeat_event+0x218/0x450 net/sctp/sm_sideeffect.c:406
> >  call_timer_fn+0x230/0x940 kernel/time/timer.c:1326
> >  expire_timers kernel/time/timer.c:1363 [inline]
> >  __run_timers+0x79e/0xc50 kernel/time/timer.c:1666
> >  run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692