syzbot


BUG: MAX_LOCKDEP_KEYS too low!

Status: upstream: reported C repro on 2023/04/09 03:19
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+0752173038063aaf3f0f@syzkaller.appspotmail.com
First crash: 659d, last: 2d10h
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2023/05/16 upstream (ToT) f1fcbaa18b28 C [report] BUG: MAX_LOCKDEP_KEYS too low!
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 BUG: MAX_LOCKDEP_KEYS too low! origin:lts-only C error 11 11d 679d 0/3 upstream: reported C repro on 2023/03/20 08:38
upstream BUG: MAX_LOCKDEP_KEYS too low! net C done error 3496 1675d 1919d 15/28 fixed on 2020/12/09 20:00
upstream BUG: MAX_LOCKDEP_KEYS too low! (2) no-reminders net nfc C unreliable 4392 2h46m 1349d 0/28 upstream: reported C repro on 2021/05/19 17:35
Fix bisection attempts (6)
Created Duration User Patch Repo Result
2024/05/30 16:17 18m bisect fix linux-6.1.y error job log
2024/03/09 00:25 1h36m bisect fix linux-6.1.y OK (0) job log log
2024/01/30 10:26 1h39m bisect fix linux-6.1.y OK (0) job log log
2023/12/17 03:59 1h25m bisect fix linux-6.1.y OK (0) job log log
2023/10/21 23:11 1h35m bisect fix linux-6.1.y OK (0) job log log
2023/09/18 07:56 1h41m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 1 PID: 40 Comm: kworker/u4:2 Not tainted 6.1.124-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound linkwatch_event
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 register_lock_class+0x83d/0x990 kernel/locking/lockdep.c:1319
 __lock_acquire+0xd3/0x1f80 kernel/locking/lockdep.c:4928
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
 _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 dev_reset_queue+0xf8/0x1a0 net/sched/sch_generic.c:1305
 netdev_for_each_tx_queue include/linux/netdevice.h:2465 [inline]
 dev_deactivate_many+0x540/0xb00 net/sched/sch_generic.c:1373
 dev_deactivate+0x177/0x270 net/sched/sch_generic.c:1396
 linkwatch_do_dev+0x104/0x160 net/core/link_watch.c:166
 __linkwatch_run_queue+0x448/0x6b0 net/core/link_watch.c:221
 linkwatch_event+0x48/0x50 net/core/link_watch.c:264
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Crashes (16):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/14 12:38 linux-6.1.y c63962be84ef b1f1cd88 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: MAX_LOCKDEP_KEYS too low!
2023/12/28 14:06 linux-6.1.y 4aa6747d9352 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: MAX_LOCKDEP_KEYS too low!
2023/11/17 00:26 linux-6.1.y fb2635ac69ab cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: MAX_LOCKDEP_KEYS too low!
2023/05/14 09:15 linux-6.1.y bf4ad6fa4e53 2b9ba477 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: MAX_LOCKDEP_KEYS too low!
2025/01/25 15:58 linux-6.1.y 75cefdf153f5 9fbd772e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_KEYS too low!
2025/01/15 17:27 linux-6.1.y c63962be84ef 7315a7cf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_KEYS too low!
2025/01/07 12:55 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_KEYS too low!
2024/04/25 08:12 linux-6.1.y 6741e066ec76 8bdc0f22 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_KEYS too low!
2024/04/13 07:22 linux-6.1.y bf1e3b1cb1e0 c8349e48 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_KEYS too low!
2024/04/08 22:11 linux-6.1.y 347385861c50 53df08b6 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_KEYS too low!
2024/03/24 21:07 linux-6.1.y d7543167affd 0ea90952 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_KEYS too low!
2023/06/05 07:34 linux-6.1.y d2869ace6eeb a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_KEYS too low!
2023/07/08 10:14 linux-6.1.y 61fd484b2cf6 668cb1fa .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: MAX_LOCKDEP_KEYS too low!
2024/11/02 12:27 linux-6.1.y 7c15117f9468 f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: MAX_LOCKDEP_KEYS too low!
2023/11/02 08:44 linux-6.1.y 32c9cdbe383c 69904c9f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: MAX_LOCKDEP_KEYS too low!
2023/04/09 03:19 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: MAX_LOCKDEP_KEYS too low!
* Struck through repros no longer work on HEAD.