syzbot


BUG: MAX_LOCKDEP_CHAINS too low!

Status: upstream: reported C repro on 2023/03/07 16:44
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+77595558bad304ba6a00@syzkaller.appspotmail.com
First crash: 205d, last: now
Bug presence (1)
Date Name Commit Repro Result
2023/05/07 upstream (ToT) fc4354c6e5c2 C [report] BUG: MAX_LOCKDEP_CHAINS too low!
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 BUG: MAX_LOCKDEP_CHAINS too low! 401 862d 1460d 0/1 auto-closed as invalid on 2021/09/16 14:16
linux-6.1 BUG: MAX_LOCKDEP_CHAINS too low! origin:upstream C 22636 now 205d 0/3 upstream: reported C repro on 2023/03/07 18:13
linux-4.19 BUG: MAX_LOCKDEP_CHAINS too low! hfsplus ext4 f2fs vfs tmpfs reiserfs nilfs2 jfs btrfs xfs hfs ntfs iso9660 fat squashfs 72698 205d 1622d 0/1 upstream: reported on 2019/04/20 01:26
upstream BUG: MAX_LOCKDEP_CHAINS too low! (2) net C error 84838 687d 1163d 22/25 fixed on 2021/11/10 00:50
upstream BUG: MAX_LOCKDEP_CHAINS too low! (3) no-reminders net C error 72619 50m 683d 0/25 upstream: reported C repro on 2021/11/14 03:47
upstream BUG: MAX_LOCKDEP_CHAINS too low! kernel C done 17240 1168d 1826d 17/25 fixed on 2020/07/17 17:58

Sample crash report:
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 7466 Comm: kworker/u4:8 Not tainted 5.15.109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: bond190 bond_mii_monitor
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 lookup_chain_cache_add kernel/locking/lockdep.c:3734 [inline]
 validate_chain kernel/locking/lockdep.c:3755 [inline]
 __lock_acquire+0x1b68/0x7620 kernel/locking/lockdep.c:5011
 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xc4/0x14c kernel/locking/spinlock.c:162
 lock_timer_base+0x108/0x214 kernel/time/timer.c:946
 __mod_timer+0x1b4/0xd30 kernel/time/timer.c:1019
 add_timer+0x6c/0x88 kernel/time/timer.c:1144
 __queue_delayed_work kernel/workqueue.c:1686 [inline]
 queue_delayed_work_on+0x1f4/0x330 kernel/workqueue.c:1711
 queue_delayed_work include/linux/workqueue.h:516 [inline]
 bond_mii_monitor+0x27f0/0x2964 drivers/net/bonding/bond_main.c:2775
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2306
 worker_thread+0x910/0x1034 kernel/workqueue.c:2453
 kthread+0x37c/0x45c kernel/kthread.c:319
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

Crashes (27042):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/04/30 14:07 linux-5.15.y f48aeeaaa64c 62df2017 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/06/25 06:22 linux-5.15.y f67653019430 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/06/13 14:23 linux-5.15.y 7349e40704a0 749afb64 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/06/06 03:14 linux-5.15.y d7af3e5ba454 a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/05/13 04:30 linux-5.15.y b0ece631f84a ecca8a24 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/08 14:10 linux-5.15.y d9b4a0c83a2d d2b00170 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 19:03 linux-5.15.y b911329317b4 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 18:53 linux-5.15.y b911329317b4 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 17:53 linux-5.15.y b911329317b4 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 17:37 linux-5.15.y b911329317b4 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 16:34 linux-5.15.y b911329317b4 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 15:59 linux-5.15.y b911329317b4 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 13:46 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 11:51 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 10:38 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 10:23 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 09:22 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 09:16 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 08:10 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 08:09 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 07:08 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 07:03 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 06:01 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 05:49 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 04:45 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 04:22 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 03:21 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 03:19 linux-5.15.y b911329317b4 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 02:05 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/28 00:50 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 23:32 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 21:57 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 20:50 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 20:33 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 19:32 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 18:32 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 18:13 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 17:07 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 16:48 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 15:41 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 15:29 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 14:22 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 14:17 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 13:11 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 13:01 linux-5.15.y b911329317b4 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 12:00 linux-5.15.y b911329317b4 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 09:55 linux-5.15.y b911329317b4 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/09/27 08:51 linux-5.15.y b911329317b4 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 16:44 linux-5.15.y d9b4a0c83a2d d7ea8bc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
* Struck through repros no longer work on HEAD.