syzbot


WARNING in call_timer_fn

Status: upstream: reported syz repro on 2022/11/16 15:25
Reported-by: syzbot+6fb78d577e89e69602f9@syzkaller.appspotmail.com
First crash: 13d, last: 4d12h

Cause bisection: introduced by (bisect log) [merge commit]:
commit 35c71aa04a13c20b7b1f01200cdd8a09842e58c8
Author: Jakub Kicinski <kuba@kernel.org>
Date: Fri Jan 28 02:59:39 2022 +0000

  Merge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue

Crash: WARNING: ODEBUG bug in netdev_run_todo (log)
Repro: syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2022/11/17 01:08 14m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git 7eba4505394e report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5978 at kernel/workqueue.c:1438 __queue_work+0xf70/0x13b0 kernel/workqueue.c:1438
Modules linked in:
CPU: 0 PID: 5978 Comm: syz-executor.3 Not tainted 6.1.0-rc4-syzkaller-01070-g7eba4505394e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__queue_work+0xf70/0x13b0 kernel/workqueue.c:1438
Code: e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 e8 64 7b 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 09 5e 2e 00 85 db 75 42 e8 50 61 2e 00 <0f> 0b e9 7e f7 ff ff e8 44 61 2e 00 0f 0b e9 10 f7 ff ff e8 38 61
RSP: 0018:ffffc90000007c98 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000100 RCX: 0000000000000100
RDX: ffff888022ba9d40 RSI: ffffffff8151be20 RDI: 0000000000000005
RBP: ffffc90000007d60 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000001 R12: ffff88806ccf4b30
R13: ffff88806ccf4b78 R14: 0000000000000000 R15: ffff88807568f000
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555558e1708 CR3: 0000000076b84000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1514 [inline]
 __run_timers.part.0+0x4a3/0xaf0 kernel/time/timer.c:1790
 __run_timers kernel/time/timer.c:1768 [inline]
 run_timer_softirq+0xb7/0x1d0 kernel/time/timer.c:1803
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x227/0x630 kernel/locking/lockdep.c:5636
Code: 76 9f 7e 83 f8 01 0f 85 3a 03 00 00 9c 58 f6 c4 02 0f 85 25 03 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90006f678d0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000decf1d RCX: 0000000000000001
RDX: 1ffff110045754f1 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000001 R09: ffffffff912a75ef
R10: fffffbfff2254ebd R11: 1ffffffff212a1df R12: 0000000000000000
R13: 0000000000000000 R14: ffff88807568f138 R15: 0000000000000000
 __flush_workqueue+0x118/0x13a0 kernel/workqueue.c:2809
 drain_workqueue+0x1a9/0x3c0 kernel/workqueue.c:2974
 hci_dev_close_sync+0x2f3/0x1200 net/bluetooth/hci_sync.c:4809
 hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554
 hci_unregister_dev+0x183/0x4e0 net/bluetooth/hci_core.c:2702
 vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:568
 __fput+0x27c/0xa90 fs/file_table.c:320
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xb3d/0x2a30 kernel/exit.c:820
 do_group_exit+0xd4/0x2a0 kernel/exit.c:950
 __do_sys_exit_group kernel/exit.c:961 [inline]
 __se_sys_exit_group kernel/exit.c:959 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:959
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3d8a68b639
Code: Unable to access opcode bytes at 0x7f3d8a68b60f.
RSP: 002b:00007ffd554b9878 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 00007f3d8a68b639
RDX: 00007f3d8a68cc8a RSI: 0000000000000000 RDI: 0000000000000007
RBP: 0000000000000007 R08: ffffffffff000000 R09: 0000000000000029
R10: 00000000000003b8 R11: 0000000000000246 R12: 00007ffd554b9f00
R13: 0000000000000003 R14: 00007ffd554b9e9c R15: 00007f3d8a782b60
 </TASK>
----------------
Code disassembly (best guess):
   0:	76 9f                	jbe    0xffffffa1
   2:	7e 83                	jle    0xffffff87
   4:	f8                   	clc
   5:	01 0f                	add    %ecx,(%rdi)
   7:	85 3a                	test   %edi,(%rdx)
   9:	03 00                	add    (%rax),%eax
   b:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  12:	85 25 03 00 00 48    	test   %esp,0x48000003(%rip)        # 0x4800001b
  18:	83 7c 24 08 00       	cmpl   $0x0,0x8(%rsp)
  1d:	74 01                	je     0x20
  1f:	fb                   	sti
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2d:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  34:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3b:	00
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	84                   	.byte 0x84
  3f:	24                   	.byte 0x24

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-kasan-gce 2022/11/16 06:20 net-next 7eba4505394e 3a127a31 .config log report syz WARNING in call_timer_fn
ci-upstream-kasan-gce-smack-root 2022/11/24 23:39 upstream c3eb11fbb826 62e26685 .config log report info WARNING in call_timer_fn
ci-upstream-bpf-next-kasan-gce 2022/11/19 11:04 bpf-next ee748cd95e3a 5bb70014 .config log report info WARNING in call_timer_fn
ci-upstream-linux-next-kasan-gce-root 2022/11/21 22:51 linux-next 15f3bff12cf6 1c576c23 .config log report info WARNING in call_timer_fn
* Struck through repros no longer work on HEAD.