================================
WARNING: inconsistent lock state
5.16.0-rc4-next-20211210-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
syz-executor.0/8117 [HC0[0]:SC1[7]:HE1:SE0] takes:
ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: might_alloc include/linux/sched/mm.h:253 [inline]
ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: slab_pre_alloc_hook mm/slab.h:739 [inline]
ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: slab_alloc_node mm/slub.c:3145 [inline]
ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: slab_alloc mm/slub.c:3239 [inline]
ffffffff8bca9b40 (fs_reclaim){+.?.}-{0:0}, at: kmem_cache_alloc_trace+0x3b/0x2c0 mm/slub.c:3256
{SOFTIRQ-ON-W} state was registered at:
  lock_acquire kernel/locking/lockdep.c:5639 [inline]
  lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604
  __fs_reclaim_acquire mm/page_alloc.c:4550 [inline]
  fs_reclaim_acquire+0x115/0x160 mm/page_alloc.c:4564
  might_alloc include/linux/sched/mm.h:253 [inline]
  slab_pre_alloc_hook mm/slab.h:739 [inline]
  slab_alloc_node mm/slub.c:3145 [inline]
  slab_alloc mm/slub.c:3239 [inline]
  kmem_cache_alloc_trace+0x3b/0x2c0 mm/slub.c:3256
  kmalloc include/linux/slab.h:581 [inline]
  kzalloc include/linux/slab.h:715 [inline]
  alloc_workqueue_attrs+0x38/0x80 kernel/workqueue.c:3405
  wq_numa_init kernel/workqueue.c:5972 [inline]
  workqueue_init+0x12f/0x9e3 kernel/workqueue.c:6099
  kernel_init_freeable+0x3fb/0x73a init/main.c:1602
  kernel_init+0x1a/0x1d0 init/main.c:1507
  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
irq event stamp: 27892
hardirqs last  enabled at (27892): [<ffffffff89600c02>] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
hardirqs last disabled at (27891): [<ffffffff8953dedb>] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1097
softirqs last  enabled at (23494): [<ffffffff8146ca83>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last  enabled at (23494): [<ffffffff8146ca83>] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
softirqs last disabled at (24153): [<ffffffff8146ca83>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last disabled at (24153): [<ffffffff8146ca83>] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(fs_reclaim);
  <Interrupt>
    lock(fs_reclaim);

 *** DEADLOCK ***

8 locks held by syz-executor.0/8117:
 #0: ffffc90006877cb8 ((&ndev->rs_timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:35 [inline]
 #0: ffffc90006877cb8 ((&ndev->rs_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x6b0 kernel/time/timer.c:1411
 #1: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: ip6_nd_hdr net/ipv6/ndisc.c:466 [inline]
 #1: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: ndisc_send_skb+0x84b/0x17f0 net/ipv6/ndisc.c:502
 #2: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: lwtunnel_xmit_redirect include/net/lwtunnel.h:95 [inline]
 #2: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: ip6_finish_output2+0x2ad/0x14f0 net/ipv6/ip6_output.c:112
 #3: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x1e3/0x3640 net/core/dev.c:4036
 #4: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: geneve_xmit+0xde/0x3530 drivers/net/geneve.c:1068
 #5: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: ip6_route_output_flags+0x0/0x320 net/ipv6/route.c:778
 #6: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: ip6_pol_route+0x156/0x11e0 net/ipv6/route.c:2217
 #7: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: rt6_probe net/ipv6/route.c:632 [inline]
 #7: ffffffff8bb81840 (rcu_read_lock_bh){....}-{1:2}, at: find_match.part.0+0x35a/0xd00 net/ipv6/route.c:752

stack backtrace:
CPU: 1 PID: 8117 Comm: syz-executor.0 Not tainted 5.16.0-rc4-next-20211210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_usage_bug kernel/locking/lockdep.c:203 [inline]
 valid_state kernel/locking/lockdep.c:3945 [inline]
 mark_lock_irq kernel/locking/lockdep.c:4148 [inline]
 mark_lock.cold+0x61/0x8e kernel/locking/lockdep.c:4605
 mark_usage kernel/locking/lockdep.c:4500 [inline]
 __lock_acquire+0x11d5/0x54a0 kernel/locking/lockdep.c:4981
 lock_acquire kernel/locking/lockdep.c:5639 [inline]
 lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604
 __fs_reclaim_acquire mm/page_alloc.c:4550 [inline]
 fs_reclaim_acquire+0x115/0x160 mm/page_alloc.c:4564
 might_alloc include/linux/sched/mm.h:253 [inline]
 slab_pre_alloc_hook mm/slab.h:739 [inline]
 slab_alloc_node mm/slub.c:3145 [inline]
 slab_alloc mm/slub.c:3239 [inline]
 kmem_cache_alloc_trace+0x3b/0x2c0 mm/slub.c:3256
 kmalloc include/linux/slab.h:581 [inline]
 kzalloc include/linux/slab.h:715 [inline]
 ref_tracker_alloc+0xe1/0x430 lib/ref_tracker.c:74
 netdev_tracker_alloc include/linux/netdevice.h:3860 [inline]
 dev_hold_track include/linux/netdevice.h:3877 [inline]
 rt6_probe net/ipv6/route.c:661 [inline]
 find_match.part.0+0xac9/0xd00 net/ipv6/route.c:752
 find_match net/ipv6/route.c:825 [inline]
 __find_rr_leaf+0x17f/0xd20 net/ipv6/route.c:826
 find_rr_leaf net/ipv6/route.c:847 [inline]
 rt6_select net/ipv6/route.c:891 [inline]
 fib6_table_lookup+0x649/0xa20 net/ipv6/route.c:2185
 ip6_pol_route+0x1c5/0x11e0 net/ipv6/route.c:2221
 pol_lookup_func include/net/ip6_fib.h:580 [inline]
 fib6_rule_lookup+0x52a/0x6f0 net/ipv6/fib6_rules.c:120
 ip6_route_output_flags_noref+0x2e2/0x380 net/ipv6/route.c:2629
 ip6_route_output_flags+0x72/0x320 net/ipv6/route.c:2642
 ip6_route_output include/net/ip6_route.h:98 [inline]
 ip6_dst_lookup_tail+0x5ab/0x1620 net/ipv6/ip6_output.c:1070
 ip6_dst_lookup_flow+0x8c/0x1d0 net/ipv6/ip6_output.c:1200
 geneve_get_v6_dst+0x46f/0x9a0 drivers/net/geneve.c:858
 geneve6_xmit_skb drivers/net/geneve.c:991 [inline]
 geneve_xmit+0x520/0x3530 drivers/net/geneve.c:1074
 __netdev_start_xmit include/linux/netdevice.h:4685 [inline]
 netdev_start_xmit include/linux/netdevice.h:4699 [inline]
 xmit_one net/core/dev.c:3473 [inline]
 dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3489
 __dev_queue_xmit+0x2983/0x3640 net/core/dev.c:4112
 neigh_resolve_output net/core/neighbour.c:1522 [inline]
 neigh_resolve_output+0x50e/0x820 net/core/neighbour.c:1502
 neigh_output include/net/neighbour.h:541 [inline]
 ip6_finish_output2+0x56e/0x14f0 net/ipv6/ip6_output.c:126
 __ip6_finish_output net/ipv6/ip6_output.c:191 [inline]
 __ip6_finish_output+0x61e/0xe80 net/ipv6/ip6_output.c:170
 ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224
 dst_output include/net/dst.h:451 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702
 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3898
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
 __run_timers kernel/time/timer.c:1715 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x45/0xc0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0033:0x7fdf562a1063
Code: 8d 45 f8 48 39 d1 0f 83 f0 00 00 00 0f 1f 00 48 89 50 08 48 89 c6 48 8b 50 f8 48 83 e8 08 48 39 d1 72 ec 49 83 c5 08 48 89 0e <4d> 39 ec 75 c8 48 89 d8 eb 0c 0f 1f 00 48 8b 78 f8 48 3b 38 74 67
RSP: 002b:00007ffeddbd7250 EFLAGS: 00000216
RAX: 00007fdf55d4d690 RBX: 00007fdf55c6a008 RCX: ffffffff83b012ea
RDX: ffffffff83b012ea RSI: 00007fdf55d4d698 RDI: 00007fdf55c6a008
RBP: 000000000001ee9c R08: 00007fdf55c6a090 R09: 000000008618d661
R10: 0000000000000000 R11: 0000000000000000 R12: 00007fdf55d614e8
R13: 00007fdf55d4d6a0 R14: 00007fdf56406198 R15: ffffffff8953f691
 </TASK>
BUG: sleeping function called from invalid context at include/linux/sched/mm.h:256
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 8117, name: syz-executor.0
preempt_count: 700, expected: 0
RCU nest depth: 4, expected: 0
INFO: lockdep is turned off.
Preemption disabled at:
[<ffffffff898000e1>] softirq_handle_begin kernel/softirq.c:396 [inline]
[<ffffffff898000e1>] __do_softirq+0xe1/0x9c2 kernel/softirq.c:534
CPU: 1 PID: 8117 Comm: syz-executor.0 Not tainted 5.16.0-rc4-next-20211210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9583
 might_alloc include/linux/sched/mm.h:256 [inline]
 slab_pre_alloc_hook mm/slab.h:739 [inline]
 slab_alloc_node mm/slub.c:3145 [inline]
 slab_alloc mm/slub.c:3239 [inline]
 kmem_cache_alloc_trace+0x25d/0x2c0 mm/slub.c:3256
 kmalloc include/linux/slab.h:581 [inline]
 kzalloc include/linux/slab.h:715 [inline]
 ref_tracker_alloc+0xe1/0x430 lib/ref_tracker.c:74
 netdev_tracker_alloc include/linux/netdevice.h:3860 [inline]
 dev_hold_track include/linux/netdevice.h:3877 [inline]
 rt6_probe net/ipv6/route.c:661 [inline]
 find_match.part.0+0xac9/0xd00 net/ipv6/route.c:752
 find_match net/ipv6/route.c:825 [inline]
 __find_rr_leaf+0x17f/0xd20 net/ipv6/route.c:826
 find_rr_leaf net/ipv6/route.c:847 [inline]
 rt6_select net/ipv6/route.c:891 [inline]
 fib6_table_lookup+0x649/0xa20 net/ipv6/route.c:2185
 ip6_pol_route+0x1c5/0x11e0 net/ipv6/route.c:2221
 pol_lookup_func include/net/ip6_fib.h:580 [inline]
 fib6_rule_lookup+0x52a/0x6f0 net/ipv6/fib6_rules.c:120
 ip6_route_output_flags_noref+0x2e2/0x380 net/ipv6/route.c:2629
 ip6_route_output_flags+0x72/0x320 net/ipv6/route.c:2642
 ip6_route_output include/net/ip6_route.h:98 [inline]
 ip6_dst_lookup_tail+0x5ab/0x1620 net/ipv6/ip6_output.c:1070
 ip6_dst_lookup_flow+0x8c/0x1d0 net/ipv6/ip6_output.c:1200
 geneve_get_v6_dst+0x46f/0x9a0 drivers/net/geneve.c:858
 geneve6_xmit_skb drivers/net/geneve.c:991 [inline]
 geneve_xmit+0x520/0x3530 drivers/net/geneve.c:1074
 __netdev_start_xmit include/linux/netdevice.h:4685 [inline]
 netdev_start_xmit include/linux/netdevice.h:4699 [inline]
 xmit_one net/core/dev.c:3473 [inline]
 dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3489
 __dev_queue_xmit+0x2983/0x3640 net/core/dev.c:4112
 neigh_resolve_output net/core/neighbour.c:1522 [inline]
 neigh_resolve_output+0x50e/0x820 net/core/neighbour.c:1502
 neigh_output include/net/neighbour.h:541 [inline]
 ip6_finish_output2+0x56e/0x14f0 net/ipv6/ip6_output.c:126
 __ip6_finish_output net/ipv6/ip6_output.c:191 [inline]
 __ip6_finish_output+0x61e/0xe80 net/ipv6/ip6_output.c:170
 ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224
 dst_output include/net/dst.h:451 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702
 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3898
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
 __run_timers kernel/time/timer.c:1715 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x45/0xc0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0033:0x7fdf562a1063
Code: 8d 45 f8 48 39 d1 0f 83 f0 00 00 00 0f 1f 00 48 89 50 08 48 89 c6 48 8b 50 f8 48 83 e8 08 48 39 d1 72 ec 49 83 c5 08 48 89 0e <4d> 39 ec 75 c8 48 89 d8 eb 0c 0f 1f 00 48 8b 78 f8 48 3b 38 74 67
RSP: 002b:00007ffeddbd7250 EFLAGS: 00000216
RAX: 00007fdf55d4d690 RBX: 00007fdf55c6a008 RCX: ffffffff83b012ea
RDX: ffffffff83b012ea RSI: 00007fdf55d4d698 RDI: 00007fdf55c6a008
RBP: 000000000001ee9c R08: 00007fdf55c6a090 R09: 000000008618d661
R10: 0000000000000000 R11: 0000000000000000 R12: 00007fdf55d614e8
R13: 00007fdf55d4d6a0 R14: 00007fdf56406198 R15: ffffffff8953f691
 </TASK>