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: 627d, last: 13m
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 1284d 1882d 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 627d 2044d 0/1 upstream: reported on 2019/04/20 01:26
upstream BUG: MAX_LOCKDEP_CHAINS too low! (2) net C error 84838 1110d 1586d 20/28 fixed on 2021/11/10 00:50
upstream BUG: MAX_LOCKDEP_CHAINS too low! (3) no-reminders kernel C error 312224 now 1105d 0/28 upstream: reported C repro on 2021/11/14 03:47
upstream BUG: MAX_LOCKDEP_CHAINS too low! kernel C done 17240 1590d 2248d 15/28 fixed on 2020/07/17 17:58
linux-5.15 BUG: MAX_LOCKDEP_CHAINS too low! origin:upstream C 98093 1h47m 627d 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 (57827):
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!
2024/11/03 22:47 linux-6.1.y 7c15117f9468 f00eed24 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/10/27 19:21 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 23:18 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 21:58 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 21:49 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 20:48 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 16:48 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 09:17 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 08:02 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 06:59 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 06:05 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 05:03 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 04:38 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 03:33 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 02:49 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 01:52 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/23 00:49 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 21:46 linux-6.1.y e4d90d63d385 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 21:37 linux-6.1.y e4d90d63d385 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 20:35 linux-6.1.y e4d90d63d385 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 20:04 linux-6.1.y e4d90d63d385 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 19:03 linux-6.1.y e4d90d63d385 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 18:00 linux-6.1.y e4d90d63d385 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 16:32 linux-6.1.y e4d90d63d385 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 16:32 linux-6.1.y e4d90d63d385 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 15:12 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 14:10 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 12:26 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 10:56 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 09:37 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 09:19 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 08:14 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 06:10 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 04:08 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 03:01 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/22 01:33 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/21 22:35 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/21 21:13 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/21 21:00 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/21 19:57 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/21 18:54 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/21 15:16 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/21 13:42 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/21 13:28 linux-6.1.y b67dc5c9ade9 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/11/21 12:04 linux-6.1.y b67dc5c9ade9 4b25d554 .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.