BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 11544 Comm: syz-executor.0 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
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 perf_ctx_lock kernel/events/core.c:163 [inline]
 perf_event_context_sched_in kernel/events/core.c:3738 [inline]
 __perf_event_task_sched_in+0x520/0x990 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:lock_acquire+0x270/0xad0 kernel/locking/lockdep.c:4962
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 f8 06 00 00 48 83 3d ad d0 5a 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7
RSP: 0018:ffffc9001677ecc8 EFLAGS: 00000282
RAX: 1ffffffff1369c10 RBX: ffff88804e9ec180 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 69bdee44deab203c RDI: 0000000000000282
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c599a27
R10: fffffbfff18b3344 R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff89bc11c0 R14: 0000000000000000 R15: ffff88809a283728
 rcu_lock_acquire include/linux/rcupdate.h:241 [inline]
 rcu_read_lock include/linux/rcupdate.h:634 [inline]
 ext4_get_group_info+0x106/0x3a0 fs/ext4/ext4.h:3048
 ext4_mb_find_by_goal+0xf1/0xd80 fs/ext4/mballoc.c:1895
 ext4_mb_regular_allocator+0x222/0x2060 fs/ext4/mballoc.c:2232
 ext4_mb_new_blocks+0x1b78/0x3e70 fs/ext4/mballoc.c:4721
 ext4_ext_map_blocks+0x2320/0x61b0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x7b8/0x1650 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1c70/0x3960 fs/ext4/inode.c:2782
 do_writepages+0xec/0x290 mm/page-writeback.c:2354
 __filemap_fdatawrite_range+0x2a1/0x380 mm/filemap.c:421
 filemap_write_and_wait_range mm/filemap.c:654 [inline]
 filemap_write_and_wait_range+0xe1/0x1c0 mm/filemap.c:648
 ext4_punch_hole+0x933/0x1180 fs/ext4/inode.c:3976
 ext4_fallocate+0x1087/0x3f20 fs/ext4/extents.c:4659
 vfs_fallocate+0x48d/0xa10 fs/open.c:309
 ioctl_preallocate+0x18e/0x200 fs/ioctl.c:494
 file_ioctl fs/ioctl.c:537 [inline]
 do_vfs_ioctl+0xde1/0x1090 fs/ioctl.c:732
 ksys_ioctl+0xa3/0x180 fs/ioctl.c:751
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl fs/ioctl.c:760 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
 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:00007f64a4809c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004eb040 RCX: 000000000045cba9
RDX: 0000000020000040 RSI: 0000000040305829 RDI: 0000000000000004
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000043c R14: 00000000004c7112 R15: 00007f64a480a6d4