rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5410/1:b..l
	(detected by 0, t=10503 jiffies, g=43453, q=82 ncpus=2)
task:kworker/1:13    state:R  running task     stack:25344 pid:5410  ppid:2      flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
 irqentry_exit+0x53/0x80 kernel/entry/common.c:433
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:seqcount_lockdep_reader_access+0x1dc/0x220 include/linux/seqlock.h:105
Code: f8 4d 85 ed 75 16 e8 53 e1 c6 f8 eb 15 e8 4c e1 c6 f8 e8 97 16 c6 01 4d 85 ed 74 ea e8 3d e1 c6 f8 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00
RSP: 0018:ffffc9000521fa40 EFLAGS: 00000293
RAX: ffffffff88c3b0e3 RBX: 0000000000000000 RCX: ffff88801ef8d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000521faf0 R08: ffffffff88c3b0b9 R09: fffffbfff2091e56
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000200 R14: 0000000000000046 R15: 1ffff92000a43f48
 nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:335 [inline]
 gc_worker+0x325/0x1530 net/netfilter/nf_conntrack_core.c:1503
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: rcu_preempt kthread starved for 10531 jiffies! g43453 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:26680 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2d2/0x1120 kernel/rcu/tree.c:1674
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1873
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8234 Comm: syz-executor.4 Not tainted 6.1.66-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4724 [inline]
RIP: 0010:__lock_acquire+0x552/0x1f80 kernel/locking/lockdep.c:4999
Code: 41 8b 1e 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 20 f2 48 90 be 08 00 00 00 e8 06 9a 77 00 48 0f a3 1d 1e 9b de 0e <73> 1f 48 8d 04 5b 48 c1 e0 06 48 8d 98 20 51 18 90 48 ba 00 00 00
RSP: 0018:ffffc90013eaf9c0 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 000000000000019a RCX: ffffffff816a56fa
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9048f250
RBP: 0000000000000003 R08: dffffc0000000000 R09: fffffbfff2091e4b
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880389fc658
R13: ffff8880389fbb80 R14: ffff8880389fc680 R15: 1ffff1100713f8d0
FS:  00007f83045f86c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb3e8dbef00 CR3: 000000002e2e3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __might_fault+0xbd/0x110 mm/memory.c:5811
 _copy_to_user+0x26/0x130 lib/usercopy.c:36
 copy_to_user include/linux/uaccess.h:169 [inline]
 copy_siginfo_to_user+0x20/0x140 kernel/signal.c:3330
 __setup_rt_frame arch/x86/kernel/signal.c:491 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:784 [inline]
 handle_signal arch/x86/kernel/signal.c:828 [inline]
 arch_do_signal_or_restart+0xb99/0x1a10 arch/x86/kernel/signal.c:873
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f830387cba7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007f83045f8178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f830399bf88 RCX: 00007f830387cba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f830399bf88
RBP: 00007f830399bf80 R08: 00007f83045f86c0 R09: 00007f83045f86c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f830399bf8c
R13: 000000000000000b R14: 00007fff1f1968c0 R15: 00007fff1f1969a8
 </TASK>