[syzbot] BUG: MAX_LOCKDEP_CHAINS too low! (3)
From: syzbot <hidden>
Date: 2021-11-14 03:47:21
Hello, syzbot found the following issue on: HEAD commit: 66f4beaa6c1d Merge branch 'linus' of git://git.kernel.org/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16adc769b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a262045c4c15a9e0 dashboard link: https://syzkaller.appspot.com/bug?extid=8a249628ae32ea7de3a2 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8a249628ae32ea7de3a2@syzkaller.appspotmail.com BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 PID: 31504 Comm: kworker/u4:13 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bond1944 bond_mii_monitor Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 add_chain_cache kernel/locking/lockdep.c:3649 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3748 [inline] validate_chain kernel/locking/lockdep.c:3769 [inline] __lock_acquire.cold+0x372/0x3ab kernel/locking/lockdep.c:5027 lock_acquire kernel/locking/lockdep.c:5637 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:946 __mod_timer+0x398/0xe30 kernel/time/timer.c:1019 __queue_delayed_work+0x1a7/0x270 kernel/workqueue.c:1678 queue_delayed_work_on+0x105/0x120 kernel/workqueue.c:1703 queue_delayed_work include/linux/workqueue.h:517 [inline] bond_mii_monitor+0x95b/0x1af0 drivers/net/bonding/bond_main.c:2759 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.