WARNING: locking bug in __inet6_bind

Status: upstream: reported syz repro on 2019/11/19 01:25
Reported-by: syzbot+e7043f75e7afad691e55@syzkaller.appspotmail.com
First crash: 2459d, last: 1783d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING: locking bug in __inet6_bind net 4 syz error error 2 1313d 2414d 0/29 auto-obsoleted due to no activity on 2023/05/08 02:33
▶ ▼ Fix bisection attempts (22)
Created Duration User Patch Repo Result
2021/10/31 15:37 13m bisect fix linux-4.19.y error job log
2021/09/24 15:32 39m bisect fix linux-4.19.y OK (0) job log log
2021/08/25 14:05 36m bisect fix linux-4.19.y OK (0) job log log
2021/07/26 13:29 35m bisect fix linux-4.19.y OK (0) job log log
2021/06/26 12:51 38m bisect fix linux-4.19.y OK (0) job log log
2021/05/27 12:09 41m bisect fix linux-4.19.y OK (0) job log log
2021/04/27 03:56 42m bisect fix linux-4.19.y OK (0) job log log
2021/03/27 11:45 33m bisect fix linux-4.19.y OK (0) job log log
2021/02/25 07:02 35m bisect fix linux-4.19.y OK (0) job log log
2021/01/22 09:49 33m bisect fix linux-4.19.y OK (0) job log log
2020/12/23 09:13 36m bisect fix linux-4.19.y OK (0) job log log
2020/11/23 08:37 35m bisect fix linux-4.19.y OK (0) job log log
2020/10/24 08:06 30m bisect fix linux-4.19.y OK (0) job log log
2020/09/24 07:32 33m bisect fix linux-4.19.y OK (0) job log log
2020/08/25 06:57 35m bisect fix linux-4.19.y OK (0) job log log
2020/07/26 06:19 37m bisect fix linux-4.19.y OK (0) job log log
2020/06/26 05:46 32m bisect fix linux-4.19.y OK (0) job log log
2020/05/27 05:05 39m bisect fix linux-4.19.y OK (0) job log log
2020/04/27 04:31 34m bisect fix linux-4.19.y OK (0) job log log
2020/03/28 03:55 35m bisect fix linux-4.19.y OK (0) job log log
2020/02/27 02:40 40m bisect fix linux-4.19.y OK (0) job log log
2020/01/28 01:51 38m bisect fix linux-4.19.y OK (0) job log log

Sample crash report:
WARNING: CPU: 0 PID: 15512 at kernel/locking/lockdep.c:698 arch_local_save_flags arch/x86/include/asm/paravirt.h:784 [inline]
WARNING: CPU: 0 PID: 15512 at kernel/locking/lockdep.c:698 arch_local_save_flags arch/x86/include/asm/paravirt.h:782 [inline]
WARNING: CPU: 0 PID: 15512 at kernel/locking/lockdep.c:698 look_up_lock_class kernel/locking/lockdep.c:689 [inline]
WARNING: CPU: 0 PID: 15512 at kernel/locking/lockdep.c:698 register_lock_class+0xfeb/0x1cf0 kernel/locking/lockdep.c:748
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 15512 Comm: syz-executor.0 Not tainted 4.19.91-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+0x197/0x210 lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x53 kernel/panic.c:541
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037
RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:698 [inline]
RIP: 0010:register_lock_class+0xfeb/0x1cf0 kernel/locking/lockdep.c:748
Code: 60 48 89 da 4d 8b 75 c0 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 fe 05 00 00 4c 89 33 e9 1b f3 ff ff 0f 0b <0f> 0b e9 0d f2 ff ff 44 89 e0 4c 8b 85 48 ff ff ff 83 c0 01 4c 8b
RSP: 0018:ffff88808dc47970 EFLAGS: 00010083
RAX: dffffc0000000000 RBX: ffff88809262e1a0 RCX: 0000000000000000
RDX: 1ffff110124c5c37 RSI: 0000000000000000 RDI: ffff88809262e1b8
RBP: ffff88808dc47a40 R08: 1ffff11011b88f37 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8a817b20
R13: 0000000000000000 R14: ffffffff88497ae0 R15: dffffc0000000000
 __lock_acquire+0x154/0x49c0 kernel/locking/lockdep.c:3299
 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:168
 spin_lock_bh include/linux/spinlock.h:334 [inline]
 lock_sock_nested+0x41/0x120 net/core/sock.c:2838
 lock_sock include/net/sock.h:1501 [inline]
 __inet6_bind+0x791/0x19c0 net/ipv6/af_inet6.c:302
 inet6_bind+0xfa/0x155 net/ipv6/af_inet6.c:455
 __sys_bind+0x239/0x290 net/socket.c:1482
 __do_sys_bind net/socket.c:1493 [inline]
 __se_sys_bind net/socket.c:1491 [inline]
 __x64_sys_bind+0x73/0xb0 net/socket.c:1491
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a919
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb8a4ad6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a919
RDX: 000000000000001c RSI: 0000000020000000 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb8a4ad76d4
R13: 00000000004c0ca5 R14: 00000000004d47d8 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/12/29 01:51 linux-4.19.y 672481c2deff af6b8ef8 .config console log report syz ci2-linux-4-19
2019/12/29 01:05 linux-4.19.y 672481c2deff af6b8ef8 .config console log report ci2-linux-4-19
2019/11/19 00:24 linux-4.19.y c555efaf1402 d5696d51 .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.