From: syzbot <syzbot+2f8c233f131943d6056d@syzkaller.appspotmail.com>
To: davem@davemloft.net, jhs@mojatatu.com, jiri@resnulli.us,
kuba@kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com,
xiyou.wangcong@gmail.com
Subject: WARNING in call_rcu
Date: Tue, 10 Mar 2020 09:05:09 -0700 [thread overview]
Message-ID: <000000000000b3cfc805a0824881@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17039f29e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f
dashboard link: https://syzkaller.appspot.com/bug?extid=2f8c233f131943d6056d
compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=117bdfa1e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1472e1fde00000
Bisection is inconclusive: the bug happens on the oldest tested release.
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=155b9f29e00000
final crash: https://syzkaller.appspot.com/x/report.txt?x=175b9f29e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=135b9f29e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+2f8c233f131943d6056d@syzkaller.appspotmail.com
------------[ cut here ]------------
ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0
WARNING: CPU: 1 PID: 8979 at lib/debugobjects.c:488 debug_print_object lib/debugobjects.c:485 [inline]
WARNING: CPU: 1 PID: 8979 at lib/debugobjects.c:488 debug_object_activate+0x5a8/0x6f0 lib/debugobjects.c:652
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8979 Comm: syz-executor219 Not tainted 5.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fb/0x318 lib/dump_stack.c:118
panic+0x264/0x7a9 kernel/panic.c:221
__warn+0x209/0x210 kernel/panic.c:582
report_bug+0x1b6/0x2f0 lib/bug.c:195
fixup_bug arch/x86/kernel/traps.c:174 [inline]
do_error_trap+0xcf/0x1c0 arch/x86/kernel/traps.c:267
do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:286
invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:debug_print_object lib/debugobjects.c:485 [inline]
RIP: 0010:debug_object_activate+0x5a8/0x6f0 lib/debugobjects.c:652
Code: 74 08 4c 89 f7 e8 d8 43 0f fe 4d 8b 06 48 c7 c7 13 ec f0 88 48 c7 c6 04 4f 06 89 4c 89 ea 89 d9 4d 89 e1 31 c0 e8 08 e0 a3 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 da eb c4 05 48 8b 5d b8
RSP: 0018:ffffc900020f73a8 EFLAGS: 00010246
RAX: eb30c415fdb00600 RBX: 0000000000000001 RCX: ffff888095774280
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900020f73f0 R08: ffffffff81601324 R09: ffffed1015d66618
R10: ffffed1015d66618 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff88f4c97a R14: ffffffff892d99a8 R15: ffff88809f5ecc98
debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline]
__call_rcu kernel/rcu/tree.c:2597 [inline]
call_rcu+0x3a/0x660 kernel/rcu/tree.c:2683
queue_rcu_work+0x79/0x90 kernel/workqueue.c:1742
tcf_queue_work+0xc9/0xe0 net/sched/cls_api.c:206
route4_change+0x18e8/0x1d90 net/sched/cls_route.c:550
tc_new_tfilter+0x1490/0x2f50 net/sched/cls_api.c:2103
rtnetlink_rcv_msg+0x8fb/0xd40 net/core/rtnetlink.c:5427
netlink_rcv_skb+0x19e/0x3e0 net/netlink/af_netlink.c:2478
rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5454
netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
netlink_unicast+0x766/0x920 net/netlink/af_netlink.c:1329
netlink_sendmsg+0xa2b/0xd40 net/netlink/af_netlink.c:1918
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg net/socket.c:672 [inline]
____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2343
___sys_sendmsg net/socket.c:2397 [inline]
__sys_sendmsg+0x1ed/0x290 net/socket.c:2430
__do_sys_sendmsg net/socket.c:2439 [inline]
__se_sys_sendmsg net/socket.c:2437 [inline]
__x64_sys_sendmsg+0x7f/0x90 net/socket.c:2437
do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446709
Code: e8 1c ba 02 00 48 83 c4 18 c3 0f 1f 80 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 0f 83 ab 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f823766ed98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446709
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c
R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
This bug 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 bug report. 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 bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2020-03-10 16:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-10 16:05 syzbot [this message]
2020-03-13 17:58 ` WARNING in call_rcu Cong Wang
2020-03-14 3:52 ` syzbot
2020-03-16 18:43 ` Cong Wang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=000000000000b3cfc805a0824881@google.com \
--to=syzbot+2f8c233f131943d6056d@syzkaller.appspotmail.com \
--cc=davem@davemloft.net \
--cc=jhs@mojatatu.com \
--cc=jiri@resnulli.us \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
--cc=xiyou.wangcong@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.