rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P12307/2:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=56269, q=92 ncpus=2)
task:syz.3.2109      state:R  running task     stack:22272 pid:12307 tgid:12299 ppid:5228   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x170/0x200 kernel/softirq.c:389
Code: 8b e8 04 be 59 0a 65 66 8b 05 84 7b ac 7e 66 85 c0 75 5d bf 01 00 00 00 e8 ed a4 0b 00 e8 e8 94 43 00 fb 65 8b 05 48 7b ac 7e <85> c0 75 05 e8 b7 5a a9 ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c
RSP: 0018:ffffc90008f2f000 EFLAGS: 00000286
RAX: 0000000080000000 RBX: 1ffff920011e5e04 RCX: ffffffff9a0fd903
RDX: dffffc0000000000 RSI: ffffffff8bead560 RDI: ffffffff8c3fb980
RBP: ffffc90008f2f0b0 R08: ffffffff8ff7412f R09: 1ffffffff1fee825
R10: dffffc0000000000 R11: fffffbfff1fee826 R12: dffffc0000000000
R13: 1ffff920011e5e08 R14: ffffc90008f2f040 R15: 0000000000000200
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 ip6t_do_table+0x1687/0x18a0 net/ipv6/netfilter/ip6_tables.c:375
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 __ip6_local_out+0x6fa/0x800 net/ipv6/output_core.c:143
 ip6_local_out+0x26/0x70 net/ipv6/output_core.c:153
 ip6_send_skb+0x1b1/0x3b0 net/ipv6/ip6_output.c:1968
 udp_v6_send_skb+0xbf5/0x1870 net/ipv6/udp.c:1292
 udpv6_sendmsg+0x23b6/0x3270 net/ipv6/udp.c:1588
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xef/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2737
 __do_sys_sendmmsg net/socket.c:2766 [inline]
 __se_sys_sendmmsg net/socket.c:2763 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb9b179eb9
RSP: 002b:00007fdb9bf98038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fdb9b316058 RCX: 00007fdb9b179eb9
RDX: 0400000000000172 RSI: 0000000020003cc0 RDI: 0000000000000007
RBP: 00007fdb9b1e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000004001c00 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdb9b316058 R15: 00007fffe2cef858
 </TASK>
rcu: rcu_preempt kthread starved for 10541 jiffies! g56269 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:25520 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111