From: syzbot <syzbot+47bbc6b678d317cccbe0@syzkaller.appspotmail.com>
To: davem@davemloft.net, jmaloy@redhat.com, kuba@kernel.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
syzkaller-bugs@googlegroups.com,
tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
Subject: Re: WARNING: suspicious RCU usage in tipc_l2_send_msg
Date: Mon, 13 Jul 2020 01:05:18 -0700 [thread overview]
Message-ID: <000000000000c421ef05aa4e2649@google.com> (raw)
In-Reply-To: <000000000000d411cf05a8ffc4a6@google.com>
syzbot has found a reproducer for the following crash on:
HEAD commit: 4437dd6e Merge tag 'io_uring-5.8-2020-07-12' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17b7869f100000
kernel config: https://syzkaller.appspot.com/x/.config?x=66ad203c2bb6d8b
dashboard link: https://syzkaller.appspot.com/bug?extid=47bbc6b678d317cccbe0
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10c005af100000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+47bbc6b678d317cccbe0@syzkaller.appspotmail.com
=============================
WARNING: suspicious RCU usage
5.8.0-rc4-syzkaller #0 Not tainted
-----------------------------
net/tipc/bearer.c:466 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
2 locks held by kworker/0:1/12:
#0: ffff88821adc9538 ((wq_completion)cryptd){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88821adc9538 ((wq_completion)cryptd){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff88821adc9538 ((wq_completion)cryptd){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff88821adc9538 ((wq_completion)cryptd){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff88821adc9538 ((wq_completion)cryptd){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff88821adc9538 ((wq_completion)cryptd){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 kernel/workqueue.c:2240
#1: ffffc90000d2fda8 ((work_completion)(&cpu_queue->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244
stack backtrace:
CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.8.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: cryptd cryptd_queue_worker
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x18f/0x20d lib/dump_stack.c:118
tipc_l2_send_msg+0x354/0x420 net/tipc/bearer.c:466
tipc_aead_encrypt_done+0x204/0x3a0 net/tipc/crypto.c:761
cryptd_aead_crypt+0xe8/0x1d0 crypto/cryptd.c:739
cryptd_queue_worker+0x118/0x1b0 crypto/cryptd.c:181
process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:291
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
next prev parent reply other threads:[~2020-07-13 8:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-26 17:09 WARNING: suspicious RCU usage in tipc_l2_send_msg syzbot
2020-07-13 8:05 ` syzbot [this message]
2020-08-12 11:53 ` syzbot
2020-08-19 9:09 ` Xin Long
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