BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 4707 Comm: syz-executor.1 Not tainted 5.8.0-rc5-next-20200716-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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
 spin_lock include/linux/spinlock.h:354 [inline]
 __dev_xmit_skb net/core/dev.c:3770 [inline]
 __dev_queue_xmit+0x1758/0x2d60 net/core/dev.c:4106
 arp_xmit_finish net/ipv4/arp.c:630 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 arp_xmit+0x8d/0xc0 net/ipv4/arp.c:639
 arp_send_dst net/ipv4/arp.c:317 [inline]
 arp_send_dst+0x16b/0x1a0 net/ipv4/arp.c:298
 arp_solicit+0x6b0/0x1290 net/ipv4/arp.c:389
 neigh_probe+0xc2/0x110 net/core/neighbour.c:1009
 __neigh_event_send+0x340/0x14a0 net/core/neighbour.c:1170
 neigh_event_send include/net/neighbour.h:443 [inline]
 neigh_resolve_output+0x428/0x6a0 net/core/neighbour.c:1473
 neigh_output include/net/neighbour.h:509 [inline]
 ip_finish_output2+0x81b/0x21f0 net/ipv4/ip_output.c:228
 __ip_finish_output net/ipv4/ip_output.c:306 [inline]
 __ip_finish_output+0x6e6/0xbc0 net/ipv4/ip_output.c:288
 ip_finish_output+0x34/0x1f0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x196/0x310 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out net/ipv4/ip_output.c:125 [inline]
 ip_send_skb net/ipv4/ip_output.c:1566 [inline]
 ip_push_pending_frames+0x125/0x2b0 net/ipv4/ip_output.c:1586
 icmp_push_reply+0x342/0x490 net/ipv4/icmp.c:390
 __icmp_send+0xb5d/0x13d0 net/ipv4/icmp.c:740
 ipv4_send_dest_unreach net/ipv4/route.c:1221 [inline]
 ipv4_link_failure+0x5f0/0x9f0 net/ipv4/route.c:1228
 dst_link_failure include/net/dst.h:426 [inline]
 arp_error_report+0xc7/0x1c0 net/ipv4/arp.c:293
 neigh_invalidate+0x20d/0x560 net/core/neighbour.c:993
 neigh_timer_handler+0xda0/0x1150 net/core/neighbour.c:1080
 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers.part.0+0x54c/0xa20 kernel/time/timer.c:1773
 __run_timers kernel/time/timer.c:1745 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1786
 __do_softirq+0x34c/0xa60 kernel/softirq.c:292
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:387 [inline]
 __irq_exit_rcu kernel/softirq.c:417 [inline]
 irq_exit_rcu+0x229/0x270 kernel/softirq.c:429
 sysvec_apic_timer_interrupt+0x54/0x120 arch/x86/kernel/apic/apic.c:1090
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587
RIP: 0010:check_memory_region+0x16/0x180 mm/kasan/generic.c:191
Code: 02 0f 1f 00 48 89 f2 be f8 00 00 00 e9 13 87 00 02 0f 1f 00 48 85 f6 0f 84 70 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 55 <53> 0f 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86
RSP: 0018:ffffc90007e6faf0 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 00000000000001ea RCX: ffffffff82018f12
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88804fa02e80
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffff88804fa02e88
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804fa02e80
R13: ffff888099be8000 R14: ffffc90007e6fcc8 R15: 0000000000000006
 instrument_atomic_read include/linux/instrumented.h:56 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline]
 buffer_uptodate include/linux/buffer_head.h:120 [inline]
 recently_deleted fs/ext4/ialloc.c:684 [inline]
 find_inode_bit+0x242/0x570 fs/ext4/ialloc.c:724
 __ext4_new_inode+0xc83/0x5390 fs/ext4/ialloc.c:927
 ext4_symlink+0x4b0/0xe10 fs/ext4/namei.c:3303
 vfs_symlink fs/namei.c:3959 [inline]
 vfs_symlink+0x453/0x690 fs/namei.c:3945
 do_symlinkat+0x258/0x2c0 fs/namei.c:3986
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45bf67
Code: Bad RIP value.
RSP: 002b:00007ffc6981f188 EFLAGS: 00000206 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045bf67
RDX: 00007ffc6981f223 RSI: 00000000004c1d41 RDI: 00007ffc6981f210
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
R10: 0000000000000075 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffc6981f1c0 R14: 0000000000000000 R15: 00007ffc6981f1d0