BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 3025 Comm: syz-executor.3 Not tainted 5.8.0-rc5-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+0x18f/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:3063 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3162 [inline]
 validate_chain kernel/locking/lockdep.c:3183 [inline]
 __lock_acquire.cold+0x11/0x3f8 kernel/locking/lockdep.c:4380
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959
 seqcount_lockdep_reader_access include/linux/seqlock.h:97 [inline]
 read_seqcount_begin.constprop.0+0xae/0x1f0 include/linux/seqlock.h:182
 ktime_get+0x3e/0x120 kernel/time/timekeeping.c:757
 __hrtimer_start_range_ns kernel/time/hrtimer.c:1094 [inline]
 hrtimer_start_range_ns+0x158/0x830 kernel/time/hrtimer.c:1133
 perf_swevent_start_hrtimer kernel/events/core.c:10145 [inline]
 cpu_clock_event_start kernel/events/core.c:10215 [inline]
 cpu_clock_event_add+0xbd/0xe0 kernel/events/core.c:10227
 event_sched_in+0x448/0xe10 kernel/events/core.c:2516
 group_sched_in kernel/events/core.c:2552 [inline]
 merge_sched_in+0x863/0x12f0 kernel/events/core.c:3632
 visit_groups_merge.constprop.0.isra.0+0x521/0x1080 kernel/events/core.c:3605
 ctx_flexible_sched_in kernel/events/core.c:3672 [inline]
 ctx_sched_in+0x2da/0x780 kernel/events/core.c:3717
 perf_event_sched_in+0x69/0xa0 kernel/events/core.c:2661
 perf_event_context_sched_in kernel/events/core.c:3757 [inline]
 __perf_event_task_sched_in+0x6a1/0x990 kernel/events/core.c:3796
 perf_event_task_sched_in include/linux/perf_event.h:1199 [inline]
 finish_task_switch+0x437/0x750 kernel/sched/core.c:3290
 context_switch kernel/sched/core.c:3456 [inline]
 __schedule+0x8e9/0x1eb0 kernel/sched/core.c:4178
 preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4436
 idtentry_exit_cond_resched arch/x86/entry/common.c:663 [inline]
 idtentry_exit_cond_rcu+0xc0/0xf0 arch/x86/entry/common.c:710
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587
RIP: 0010:__might_sleep+0x35/0x190 kernel/sched/core.c:6846
Code: 55 41 89 d5 41 54 41 89 f4 55 48 89 fd 53 65 48 8b 1c 25 00 ff 01 00 48 8d 7b 10 48 83 ec 10 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 0b 01 00 00 48 8b 43 10 48 85 c0 74 3e 65 48 8b 1c 25 00 ff
RSP: 0018:ffffc900056d7b40 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff88805f4d20c0 RCX: ffffc9000f498000
RDX: 1ffff1100be9a41a RSI: 000000000000001b RDI: ffff88805f4d20d0
RBP: ffffffff88935500 R08: 0000000000000001 R09: ffff88805b98e0c3
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000001b
R13: 0000000000000000 R14: 0000000000000005 R15: ffff88805f4c43b8
 __might_fault+0xba/0x1d0 mm/memory.c:4815
 _copy_to_user+0x29/0x160 lib/usercopy.c:27
 copy_to_user include/linux/uaccess.h:152 [inline]
 seq_read+0xc31/0x1070 fs/seq_file.c:257
 do_loop_readv_writev fs/read_write.c:734 [inline]
 do_loop_readv_writev fs/read_write.c:721 [inline]
 do_iter_read+0x48e/0x650 fs/read_write.c:955
 vfs_readv+0xe5/0x150 fs/read_write.c:1073
 do_readv+0x139/0x300 fs/read_write.c:1110
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cba9
Code: Bad RIP value.
RSP: 002b:00007f56ad544c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00000000004fdd00 RCX: 000000000045cba9
RDX: 00000000000003c1 RSI: 0000000020000580 RDI: 0000000000000004
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000008ef R14: 00000000004cba9b R15: 00007f56ad5456d4