syzbot


BUG: MAX_LOCKDEP_CHAINS too low!

Status: upstream: reported C repro on 2023/03/07 18:13
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+7a44bac76a5b55f56fcd@syzkaller.appspotmail.com
First crash: 504d, last: 3h01m
Bug presence (3)
Date Name Commit Repro Result
2023/11/14 linux-6.1.y (ToT) fb2635ac69ab C [report] INFO: rcu detected stall in corrupted
2023/05/16 upstream (ToT) f1fcbaa18b28 C [report] BUG: MAX_LOCKDEP_CHAINS too low!
2023/11/14 upstream (ToT) 9bacdd8996c7 C Didn't crash
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 1161d 1760d 0/1 auto-closed as invalid on 2021/09/16 14:16
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 505d 1922d 0/1 upstream: reported on 2019/04/20 01:26
upstream BUG: MAX_LOCKDEP_CHAINS too low! (2) net C error 84838 987d 1463d 20/27 fixed on 2021/11/10 00:50
upstream BUG: MAX_LOCKDEP_CHAINS too low! (3) no-reminders kernel C error 213440 now 983d 0/27 upstream: reported C repro on 2021/11/14 03:47
upstream BUG: MAX_LOCKDEP_CHAINS too low! kernel C done 17240 1467d 2126d 15/27 fixed on 2020/07/17 17:58
linux-5.15 BUG: MAX_LOCKDEP_CHAINS too low! origin:upstream C 75934 now 504d 0/3 upstream: reported C repro on 2023/03/07 16:44
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/11/16 20:32 2h02m fix candidate upstream OK (0) job log

Sample crash report:
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 474 Comm: kworker/u4:4 Not tainted 6.1.90-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: bond1363 bond_netdev_notify_work
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __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:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b88/0x7680 kernel/locking/lockdep.c:5049
 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
 down_read+0x64/0x308 kernel/locking/rwsem.c:1520
 wireless_nlevent_flush net/wireless/wext-core.c:350 [inline]
 wext_netdev_notifier_call+0x2c/0x124 net/wireless/wext-core.c:370
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:1970 [inline]
 netdev_bonding_info_change+0x150/0x1d0 net/core/dev.c:7935
 bond_netdev_notify_work+0x1fc/0x3fc drivers/net/bonding/bond_main.c:1752
 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864

Crashes (52409):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/11 07:38 linux-6.1.y 909ba1f1b414 f7c35481 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/03/30 10:16 linux-6.1.y e5cd595e23c1 6baf5069 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/03/10 00:11 linux-6.1.y 61adba85cc40 6ee49f2e .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/01/07 23:57 linux-6.1.y 38fb82ecd144 d0304e9c .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/10/21 05:48 linux-6.1.y 7d24402875c7 361b23dc .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/05/07 00:02 linux-6.1.y ca48fc16c493 90c93c40 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/06/25 05:52 linux-6.1.y e84a4e368abe 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/06/12 12:33 linux-6.1.y 2f3918bc53fb 49519f06 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/06/06 12:34 linux-6.1.y 76ba310227d2 a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/04/29 10:02 linux-6.1.y ca1c9012c941 62df2017 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/10 05:52 linux-6.1.y 42616e0f09fb f08b59ac .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/24 07:28 linux-6.1.y 9b3f9a5b12dc 57b2edb1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/24 05:02 linux-6.1.y 9b3f9a5b12dc 57b2edb1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/24 03:42 linux-6.1.y 9b3f9a5b12dc 57b2edb1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/23 23:16 linux-6.1.y 9b3f9a5b12dc e50e8da5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/23 13:03 linux-6.1.y 9b3f9a5b12dc e50e8da5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/22 15:24 linux-6.1.y 9b3f9a5b12dc df655b64 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/22 11:09 linux-6.1.y 9b3f9a5b12dc df655b64 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/22 11:08 linux-6.1.y 9b3f9a5b12dc df655b64 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/20 15:51 linux-6.1.y 9b3f9a5b12dc b88348e9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/20 14:02 linux-6.1.y 9b3f9a5b12dc b88348e9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/19 23:00 linux-6.1.y 9b3f9a5b12dc 890ce4f3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/19 03:11 linux-6.1.y 9b3f9a5b12dc ee4e11c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/18 20:42 linux-6.1.y 9b3f9a5b12dc 71884c12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/18 14:58 linux-6.1.y 9b3f9a5b12dc 71884c12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/18 03:56 linux-6.1.y cac15753b8ce 0f902625 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/17 22:47 linux-6.1.y cac15753b8ce 0f902625 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/17 07:48 linux-6.1.y cac15753b8ce 215bec2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/16 04:47 linux-6.1.y cac15753b8ce e8709b21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/16 00:34 linux-6.1.y cac15753b8ce e8709b21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/15 21:51 linux-6.1.y cac15753b8ce e8709b21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/15 11:15 linux-6.1.y cac15753b8ce c605e6a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/15 10:37 linux-6.1.y cac15753b8ce c605e6a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/15 08:44 linux-6.1.y cac15753b8ce c605e6a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/14 09:42 linux-6.1.y 266ee8e06d5b eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/13 14:49 linux-6.1.y 266ee8e06d5b eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/12 20:56 linux-6.1.y 266ee8e06d5b eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/12 03:04 linux-6.1.y 266ee8e06d5b eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/11 22:45 linux-6.1.y 266ee8e06d5b eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/11 14:59 linux-6.1.y 266ee8e06d5b c699c2eb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/11 12:25 linux-6.1.y 7753af06eebf c699c2eb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/10 14:05 linux-6.1.y 7753af06eebf bc144f9a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/10 10:53 linux-6.1.y 7753af06eebf bc144f9a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/10 02:09 linux-6.1.y 7753af06eebf bc144f9a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/09 22:45 linux-6.1.y 7753af06eebf 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/09 20:54 linux-6.1.y 7753af06eebf 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/09 08:57 linux-6.1.y 7753af06eebf bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/08 21:05 linux-6.1.y 7753af06eebf cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/07 18:19 linux-6.1.y 7753af06eebf 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/06 19:56 linux-6.1.y 7753af06eebf 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/06 17:49 linux-6.1.y 7753af06eebf 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/06 10:44 linux-6.1.y 7753af06eebf 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/06 07:01 linux-6.1.y 7753af06eebf 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/05 19:47 linux-6.1.y 7753af06eebf 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/05 17:57 linux-6.1.y 7753af06eebf 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/04 15:56 linux-6.1.y 99e6a620de00 3f2748a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/04 10:07 linux-6.1.y 99e6a620de00 3f2748a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/04 03:09 linux-6.1.y 99e6a620de00 f76a75f3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/07/04 00:21 linux-6.1.y 99e6a620de00 f76a75f3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2023/05/20 23:32 linux-6.1.y fa74641fb6b9 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: MAX_LOCKDEP_CHAINS too low!
2023/03/07 18:13 linux-6.1.y 42616e0f09fb d7ea8bc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
* Struck through repros no longer work on HEAD.