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: 423d, last: now
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 1080d 1678d 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 423d 1841d 0/1 upstream: reported on 2019/04/20 01:26
upstream BUG: MAX_LOCKDEP_CHAINS too low! (2) net C error 84838 906d 1382d 20/26 fixed on 2021/11/10 00:50
upstream BUG: MAX_LOCKDEP_CHAINS too low! (3) no-reminders kernel C error 160857 now 901d 0/26 upstream: reported C repro on 2021/11/14 03:47
upstream BUG: MAX_LOCKDEP_CHAINS too low! kernel C done 17240 1386d 2044d 15/26 fixed on 2020/07/17 17:58
linux-5.15 BUG: MAX_LOCKDEP_CHAINS too low! origin:upstream C 54693 now 423d 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 job log (0)

Sample crash report:
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 4715 Comm: syz-executor290 Not tainted 6.1.83-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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/0x5c 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
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162
 skb_dequeue+0x38/0x144 net/core/skbuff.c:3410
 wireless_nlevent_flush net/wireless/wext-core.c:352 [inline]
 wext_netdev_notifier_call+0x78/0x124 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]
 call_netdevice_notifiers_extack net/core/dev.c:2008 [inline]
 __dev_open+0x238/0x4fc net/core/dev.c:1446
 dev_open+0xa8/0x23c net/core/dev.c:1493
 team_port_add drivers/net/team/team.c:1217 [inline]
 team_add_slave+0x704/0x1f78 drivers/net/team/team.c:1987
 do_set_master net/core/rtnetlink.c:2598 [inline]
 rtnl_newlink_create net/core/rtnetlink.c:3407 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3610 [inline]
 rtnl_newlink+0x17c8/0x1b74 net/core/rtnetlink.c:3623
 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6121
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2508
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6139
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1352
 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x55c/0x848 net/socket.c:2514
 ___sys_sendmsg net/socket.c:2568 [inline]
 __sys_sendmsg+0x26c/0x33c net/socket.c:2597
 __do_sys_sendmsg net/socket.c:2606 [inline]
 __se_sys_sendmsg net/socket.c:2604 [inline]
 __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2604
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
8021q: adding VLAN 0 to HW filter on device batadv459
team459: Port device batadv459 added

Crashes (45709):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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!
2024/05/04 01:28 linux-6.1.y 909ba1f1b414 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/04 01:22 linux-6.1.y 909ba1f1b414 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/04 00:21 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 23:27 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 20:57 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 19:36 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 19:31 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 18:29 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 17:20 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 16:11 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 13:57 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 13:04 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 12:24 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 11:31 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 11:29 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 10:29 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 09:31 linux-6.1.y 909ba1f1b414 dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 08:33 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 07:25 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 05:43 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 04:23 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 03:26 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 02:07 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 01:04 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 01:03 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/03 00:00 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 23:51 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 22:47 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 22:33 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 21:20 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 21:07 linux-6.1.y 909ba1f1b414 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 19:39 linux-6.1.y 909ba1f1b414 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 19:30 linux-6.1.y 909ba1f1b414 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 18:30 linux-6.1.y 909ba1f1b414 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 18:23 linux-6.1.y 909ba1f1b414 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 17:22 linux-6.1.y 909ba1f1b414 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 16:16 linux-6.1.y 909ba1f1b414 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 15:16 linux-6.1.y dcbc050cb0d3 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 14:09 linux-6.1.y dcbc050cb0d3 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 12:37 linux-6.1.y dcbc050cb0d3 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 11:08 linux-6.1.y dcbc050cb0d3 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: MAX_LOCKDEP_CHAINS too low!
2024/05/02 09:57 linux-6.1.y dcbc050cb0d3 3ba885bc .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.