From: syzbot <syzbot+92beb3d46aab498710fa@syzkaller.appspotmail.com>
To: andrii@kernel.org, andy@greyhouse.net, ast@kernel.org,
bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net,
edumazet@google.com, hawk@kernel.org, j.vosburgh@gmail.com,
john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org,
kuba@kernel.org, linux-kernel@vger.kernel.org,
liuhangbin@gmail.com, netdev@vger.kernel.org, pabeni@redhat.com,
songliubraving@fb.com, syzkaller-bugs@googlegroups.com,
vfalico@gmail.com, yhs@fb.com
Subject: [syzbot] WARNING: suspicious RCU usage in bond_ethtool_get_ts_info
Date: Thu, 12 May 2022 12:35:28 -0700 [thread overview]
Message-ID: <000000000000fd857805ded5a88e@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 01f4685797a5 eth: amd: remove NI6510 support (ni65)
git tree: net-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=16391d99f00000
kernel config: https://syzkaller.appspot.com/x/.config?x=c04cc4641789ea51
dashboard link: https://syzkaller.appspot.com/bug?extid=92beb3d46aab498710fa
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17df03e1f00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12159cbef00000
The issue was bisected to:
commit aa6034678e873db8bd5c5a4b73f8b88c469374d6
Author: Hangbin Liu <liuhangbin@gmail.com>
Date: Fri Jan 21 08:25:18 2022 +0000
bonding: use rcu_dereference_rtnl when get bonding active slave
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16fce349f00000
final oops: https://syzkaller.appspot.com/x/report.txt?x=15fce349f00000
console output: https://syzkaller.appspot.com/x/log.txt?x=11fce349f00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+92beb3d46aab498710fa@syzkaller.appspotmail.com
Fixes: aa6034678e87 ("bonding: use rcu_dereference_rtnl when get bonding active slave")
=============================
WARNING: suspicious RCU usage
5.18.0-rc5-syzkaller-01392-g01f4685797a5 #0 Not tainted
-----------------------------
include/net/bonding.h:353 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor317/3599:
#0: ffff88801de78130 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1680 [inline]
#0: ffff88801de78130 (sk_lock-AF_INET){+.+.}-{0:0}, at: sock_setsockopt+0x1e3/0x2ec0 net/core/sock.c:1066
stack backtrace:
CPU: 0 PID: 3599 Comm: syz-executor317 Not tainted 5.18.0-rc5-syzkaller-01392-g01f4685797a5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
bond_option_active_slave_get_rcu include/net/bonding.h:353 [inline]
bond_ethtool_get_ts_info+0x32c/0x3a0 drivers/net/bonding/bond_main.c:5595
__ethtool_get_ts_info+0x173/0x240 net/ethtool/common.c:554
ethtool_get_phc_vclocks+0x99/0x110 net/ethtool/common.c:568
sock_timestamping_bind_phc net/core/sock.c:869 [inline]
sock_set_timestamping+0x3a3/0x7e0 net/core/sock.c:916
sock_setsockopt+0x543/0x2ec0 net/core/sock.c:1221
__sys_setsockopt+0x55e/0x6a0 net/socket.c:2223
__do_sys_setsockopt net/socket.c:2238 [inline]
__se_sys_setsockopt net/socket.c:2235 [inline]
__x64_sys_setsockopt+0xba/0x150 net/socket.c:2235
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f8902c8eb39
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2022-05-12 19:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-12 19:35 syzbot [this message]
2022-05-13 1:51 ` [syzbot] WARNING: suspicious RCU usage in bond_ethtool_get_ts_info Hangbin Liu
2022-05-13 8:48 ` Vladimir Oltean
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