BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 32271 Comm: syz-executor.5 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
 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline]
 read_seqcount_begin include/linux/seqlock.h:164 [inline]
 ktime_get kernel/time/timekeeping.c:757 [inline]
 ktime_get+0xd0/0x2f0 kernel/time/timekeeping.c:747
 hrtimer_expires_remaining include/linux/hrtimer.h:301 [inline]
 __hrtimer_get_remaining+0xd1/0x190 kernel/time/hrtimer.c:1301
 hrtimer_get_remaining include/linux/hrtimer.h:451 [inline]
 perf_swevent_cancel_hrtimer.part.0+0x26/0x70 kernel/events/core.c:9858
 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:ffffc90001b67690 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02
RAX: 1ffffffff12e7698 RBX: ffff88805ed60300 RCX: 000000000000311e
RDX: dffffc0000000000 RSI: 1ffff9200036cebb RDI: 0000000000000286
RBP: ffffffff89851be0 R08: ffffffff8c0403f0 R09: fffffbfff180e777
R10: fffffbfff180e776 R11: ffffffff8c073bb7 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 __fs_reclaim_acquire mm/page_alloc.c:4073 [inline]
 fs_reclaim_acquire.part.0+0x20/0x30 mm/page_alloc.c:4084
 slab_pre_alloc_hook mm/slab.h:562 [inline]
 slab_alloc mm/slab.c:3306 [inline]
 kmem_cache_alloc+0x26/0x730 mm/slab.c:3484
 kmem_cache_zalloc include/linux/slab.h:659 [inline]
 ext4_init_io_end+0x23/0x170 fs/ext4/page-io.c:281
 ext4_writepages+0x929/0x3080 fs/ext4/inode.c:2720
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
 __filemap_fdatawrite_range+0x2aa/0x390 mm/filemap.c:421
 filemap_write_and_wait_range mm/filemap.c:654 [inline]
 filemap_write_and_wait_range+0xf7/0x1e0 mm/filemap.c:648
 filemap_write_and_wait include/linux/fs.h:2763 [inline]
 swap_inode_boot_loader fs/ext4/ioctl.c:148 [inline]
 ext4_ioctl+0x18d5/0x4f80 fs/ext4/ioctl.c:1058
 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:00007f5d974a9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5d974aa6d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000005
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000410 R14: 00000000004d3678 R15: 000000000076bf0c