BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 PID: 22629 Comm: syz-executor.0 Not tainted 5.6.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:2840 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:2914 [inline]
 validate_chain kernel/locking/lockdep.c:2935 [inline]
 __lock_acquire.cold+0x263/0x288 kernel/locking/lockdep.c:3954
 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4484
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x8c/0xbf kernel/locking/spinlock.c:159
 debug_object_deactivate lib/debugobjects.c:710 [inline]
 debug_object_deactivate+0x104/0x320 lib/debugobjects.c:698
 debug_hrtimer_deactivate kernel/time/hrtimer.c:421 [inline]
 debug_deactivate kernel/time/hrtimer.c:482 [inline]
 remove_hrtimer kernel/time/hrtimer.c:1031 [inline]
 hrtimer_try_to_cancel kernel/time/hrtimer.c:1169 [inline]
 hrtimer_try_to_cancel+0x1a7/0x5b0 kernel/time/hrtimer.c:1151
 hrtimer_cancel+0x13/0x40 kernel/time/hrtimer.c:1278
 perf_swevent_cancel_hrtimer kernel/events/core.c:9913 [inline]
 cpu_clock_event_stop kernel/events/core.c:9912 [inline]
 cpu_clock_event_del+0x5a/0x70 kernel/events/core.c:9927
 event_sched_out kernel/events/core.c:2110 [inline]
 event_sched_out.isra.0+0x2af/0xaf0 kernel/events/core.c:2089
 group_sched_out.part.0+0x5d/0x200 kernel/events/core.c:2143
 group_sched_out kernel/events/core.c:2138 [inline]
 ctx_sched_out+0x87f/0xa40 kernel/events/core.c:3094
 task_ctx_sched_out+0x5b/0x80 kernel/events/core.c:2516
 perf_event_context_sched_out kernel/events/core.c:3280 [inline]
 __perf_event_task_sched_out+0x988/0x14a0 kernel/events/core.c:3371
 perf_event_task_sched_out include/linux/perf_event.h:1196 [inline]
 prepare_task_switch kernel/sched/core.c:3153 [inline]
 context_switch kernel/sched/core.c:3332 [inline]
 __schedule+0xdd7/0x1f90 kernel/sched/core.c:4080
 preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4337
 retint_kernel+0x1b/0x2b
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline]
RIP: 0010:lock_acquire+0x209/0x420 kernel/locking/lockdep.c:4487
Code: 94 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 de 01 00 00 48 83 3d a3 0f 1b 08 00 0f 84 5a 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b
RSP: 0018:ffffc900021e7a78 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff12e7698 RBX: ffff88804e192580 RCX: 0000000000006bc4
RDX: dffffc0000000000 RSI: 1ffff9200043cf38 RDI: 0000000000000286
RBP: ffff88808eb38548 R08: ffffffff8c05d920 R09: fffffbfff180e79c
R10: fffffbfff180e79b R11: ffffffff8c073cdf R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 kernfs_drain fs/kernfs/dir.c:468 [inline]
 __kernfs_remove fs/kernfs/dir.c:1323 [inline]
 __kernfs_remove+0x7ba/0x950 fs/kernfs/dir.c:1282
 kernfs_remove_by_name_ns+0x51/0xb0 fs/kernfs/dir.c:1516
 kernfs_remove_by_name include/linux/kernfs.h:586 [inline]
 remove_files.isra.0+0x76/0x190 fs/sysfs/group.c:27
 sysfs_remove_group+0xb3/0x1b0 fs/sysfs/group.c:288
 br_dev_delete+0x112/0x190 net/bridge/br_if.c:382
 br_del_bridge+0xc8/0x110 net/bridge/br_if.c:483
 br_ioctl_deviceless_stub+0x28b/0x770 net/bridge/br_ioctl.c:376
 sock_ioctl+0x44b/0x790 net/socket.c:1151
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f39a3588c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f39a35896d4 RCX: 000000000045c849
RDX: 0000000020000680 RSI: 00000000000089a1 RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000416 R14: 00000000004d36c0 R15: 000000000076bf0c