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* WARNING: locking bug in rhashtable_walk_enter
@ 2019-05-18  7:28 syzbot
  2019-05-21 21:08 ` syzbot
  0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2019-05-18  7:28 UTC (permalink / raw)
  To: davem, jon.maloy, linux-kernel, netdev, syzkaller-bugs,
	tipc-discussion, ying.xue

Hello,

syzbot found the following crash on:

HEAD commit:    510e2ced ipv6: fix src addr routing with the exception table
git tree:       net
console output: https://syzkaller.appspot.com/x/log.txt?x=11079cf8a00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=82f0809e8f0a8c87
dashboard link: https://syzkaller.appspot.com/bug?extid=6440134c13554d3abfb0
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1055ac6ca00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13d5658ca00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+6440134c13554d3abfb0@syzkaller.appspotmail.com

------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS)
WARNING: CPU: 0 PID: 9008 at kernel/locking/lockdep.c:3764  
__lock_acquire+0x17b5/0x5490 kernel/locking/lockdep.c:3764
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 9008 Comm: syz-executor616 Not tainted 5.1.0+ #17
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+0x172/0x1f0 lib/dump_stack.c:113
  panic+0x2cb/0x65c kernel/panic.c:214
  __warn.cold+0x20/0x45 kernel/panic.c:566
  report_bug+0x263/0x2b0 lib/bug.c:186
  fixup_bug arch/x86/kernel/traps.c:180 [inline]
  fixup_bug arch/x86/kernel/traps.c:175 [inline]
  do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:273
  do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:292
  invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:972
RIP: 0010:__lock_acquire+0x17b5/0x5490 kernel/locking/lockdep.c:3764
Code: d2 0f 85 c7 2c 00 00 44 8b 3d 07 46 09 08 45 85 ff 0f 85 57 f3 ff ff  
48 c7 c6 c0 53 6b 87 48 c7 c7 a0 2a 6b 87 e8 f9 f0 eb ff <0f> 0b e9 40 f3  
ff ff 0f 0b e9 83 f1 ff ff 8b 0d e7 52 ee 08 85 c9
RSP: 0018:ffff888085edf3e0 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815afbe6 RDI: ffffed1010bdbe6e
RBP: ffff888085edf588 R08: ffff8880a41cc5c0 R09: fffffbfff1133055
R10: fffffbfff1133054 R11: ffffffff889982a3 R12: 00000000a508a4ad
R13: 0000000000000000 R14: 00000000000404ad R15: 0000000000000000
  lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4302
  __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
  _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151
  spin_lock include/linux/spinlock.h:338 [inline]
  rhashtable_walk_enter+0xf9/0x390 lib/rhashtable.c:669
  __tipc_dump_start+0x1fa/0x3c0 net/tipc/socket.c:3414
  tipc_dump_start+0x70/0x90 net/tipc/socket.c:3396
  __netlink_dump_start+0x4fb/0x7e0 net/netlink/af_netlink.c:2351
  netlink_dump_start include/linux/netlink.h:226 [inline]
  tipc_sock_diag_handler_dump+0x1d9/0x270 net/tipc/diag.c:91
  __sock_diag_cmd net/core/sock_diag.c:232 [inline]
  sock_diag_rcv_msg+0x322/0x410 net/core/sock_diag.c:263
  netlink_rcv_skb+0x17a/0x460 net/netlink/af_netlink.c:2486
  sock_diag_rcv+0x2b/0x40 net/core/sock_diag.c:274
  netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
  netlink_unicast+0x536/0x720 net/netlink/af_netlink.c:1337
  netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1926
  sock_sendmsg_nosec net/socket.c:660 [inline]
  sock_sendmsg+0x12e/0x170 net/socket.c:671
  ___sys_sendmsg+0x81d/0x960 net/socket.c:2292
  __sys_sendmsg+0x105/0x1d0 net/socket.c:2330
  __do_sys_sendmsg net/socket.c:2339 [inline]
  __se_sys_sendmsg net/socket.c:2337 [inline]
  __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2337
  do_syscall_64+0x103/0x680 arch/x86/entry/common.c:301
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4401f9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffce1688958 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401f9
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a80
R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000
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.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: WARNING: locking bug in rhashtable_walk_enter
  2019-05-18  7:28 WARNING: locking bug in rhashtable_walk_enter syzbot
@ 2019-05-21 21:08 ` syzbot
  2019-05-22 13:38   ` Jon Maloy
  0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2019-05-21 21:08 UTC (permalink / raw)
  To: davem, hujunwei4, jon.maloy, linux-kernel, netdev,
	syzkaller-bugs, tipc-discussion, wangxiaogang3, ying.xue

syzbot has bisected this bug to:

commit 7e27e8d6130c5e88fac9ddec4249f7f2337fe7f8
Author: Junwei Hu <hujunwei4@huawei.com>
Date:   Thu May 16 02:51:15 2019 +0000

     tipc: switch order of device registration to fix a crash

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1285d39ca00000
start commit:   f49aa1de Merge tag 'for-5.2-rc1-tag' of git://git.kernel.o..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=1185d39ca00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1685d39ca00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fc045131472947d7
dashboard link: https://syzkaller.appspot.com/bug?extid=6440134c13554d3abfb0
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10c586bca00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14759fb2a00000

Reported-by: syzbot+6440134c13554d3abfb0@syzkaller.appspotmail.com
Fixes: 7e27e8d6130c ("tipc: switch order of device registration to fix a  
crash")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

^ permalink raw reply	[flat|nested] 3+ messages in thread

* RE: WARNING: locking bug in rhashtable_walk_enter
  2019-05-21 21:08 ` syzbot
@ 2019-05-22 13:38   ` Jon Maloy
  0 siblings, 0 replies; 3+ messages in thread
From: Jon Maloy @ 2019-05-22 13:38 UTC (permalink / raw)
  To: syzbot, davem, hujunwei4, linux-kernel, netdev, syzkaller-bugs,
	tipc-discussion, wangxiaogang3, ying.xue



> -----Original Message-----
> From: netdev-owner@vger.kernel.org <netdev-owner@vger.kernel.org>
> On Behalf Of syzbot
> Sent: 21-May-19 17:08
> To: davem@davemloft.net; hujunwei4@huawei.com; Jon Maloy
> <jon.maloy@ericsson.com>; linux-kernel@vger.kernel.org;
> netdev@vger.kernel.org; syzkaller-bugs@googlegroups.com; tipc-
> discussion@lists.sourceforge.net; wangxiaogang3@huawei.com;
> ying.xue@windriver.com
> Subject: Re: WARNING: locking bug in rhashtable_walk_enter
> 
> syzbot has bisected this bug to:
> 
> commit 7e27e8d6130c5e88fac9ddec4249f7f2337fe7f8
> Author: Junwei Hu <hujunwei4@huawei.com>
> Date:   Thu May 16 02:51:15 2019 +0000
> 
>      tipc: switch order of device registration to fix a crash

This bug was fixed by:
commit 526f5b851a96 (" tipc: fix modprobe tipc failed after switch order of device registration")

///jon

> 
> bisection log:  https://protect2.fireeye.com/url?k=c4fa0d6e-982e08d1-
> c4fa4df5-868f633dbf25-
> 265eeab89c3c62e3&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2
> Fbisect.txt%3Fx%3D1285d39ca00000
> start commit:   f49aa1de Merge tag 'for-5.2-rc1-tag' of git://git.kernel.o..
> git tree:       upstream
> final crash:    https://protect2.fireeye.com/url?k=f892c3bf-a446c600-
> f8928324-868f633dbf25-
> a1f259f41c2e3c70&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2F
> report.txt%3Fx%3D1185d39ca00000
> console output: https://protect2.fireeye.com/url?k=a265e997-feb1ec28-
> a265a90c-868f633dbf25-
> 3536c18414f0985d&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2
> Flog.txt%3Fx%3D1685d39ca00000
> kernel config:  https://protect2.fireeye.com/url?k=e063d9ce-bcb7dc71-
> e0639955-868f633dbf25-
> 34fb69deb3d9bb60&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%
> 2F.config%3Fx%3Dfc045131472947d7
> dashboard link: https://protect2.fireeye.com/url?k=b1ac8435-ed78818a-
> b1acc4ae-868f633dbf25-
> 92f95bff1ae4b05d&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fbug
> %3Fextid%3D6440134c13554d3abfb0
> syz repro:      https://protect2.fireeye.com/url?k=0473f5e5-58a7f05a-
> 0473b57e-868f633dbf25-
> 3d8da37dd852ac3b&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2
> Frepro.syz%3Fx%3D10c586bca00000
> C reproducer:   https://protect2.fireeye.com/url?k=0797bac5-5b43bf7a-
> 0797fa5e-868f633dbf25-
> ba5da04a9604be86&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2
> Frepro.c%3Fx%3D14759fb2a00000
> 
> Reported-by: syzbot+6440134c13554d3abfb0@syzkaller.appspotmail.com
> Fixes: 7e27e8d6130c ("tipc: switch order of device registration to fix a
> crash")
> 
> For information about bisection process see:
> https://protect2.fireeye.com/url?k=dd8443d3-8150466c-dd840348-
> 868f633dbf25-
> e8766eb633d4e43d&q=1&u=https%3A%2F%2Fgoo.gl%2FtpsmEJ%23bisectio
> n

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2019-05-22 13:38 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2019-05-18  7:28 WARNING: locking bug in rhashtable_walk_enter syzbot
2019-05-21 21:08 ` syzbot
2019-05-22 13:38   ` Jon Maloy

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