rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5276/1:b..l
	(detected by 1, t=10502 jiffies, g=24417, q=142 ncpus=2)
task:kworker/0:12    state:R  running task     stack:24920 pid:5276  ppid:2      flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:seqcount_lockdep_reader_access+0x196/0x1d0 include/linux/seqlock.h:105
Code: f9 4d 85 e4 75 16 e8 29 d7 11 f9 eb 15 e8 22 d7 11 f9 e8 5d b9 bb 01 4d 85 e4 74 ea e8 13 d7 11 f9 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 43 c7 44 3e 08 00 00 00 00 65 48 8b 04 25
RSP: 0000:ffffc9001c4d7a20 EFLAGS: 00000293
RAX: ffffffff88709b5d RBX: 0000000000000000 RCX: ffff888075f8d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9001c4d7ad0 R08: ffffffff90af32d7 R09: 1ffffffff215e65a
R10: dffffc0000000000 R11: fffffbfff215e65b R12: 0000000000000200
R13: ffff88802d8b00c0 R14: 1ffff9200389af44 R15: dffffc0000000000
 nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:354 [inline]
 gc_worker+0x30c/0x13c0 net/netfilter/nf_conntrack_core.c:1517
 process_one_work+0x8a2/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1270 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: rcu_preempt kthread starved for 10517 jiffies! g24417 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:26864 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 schedule+0xb9/0x180 kernel/sched/core.c:6638
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 7319 Comm: syz.4.654 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:228 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:240 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:tomoyo_check_acl+0x2df/0x3f0 security/tomoyo/domain.c:184
Code: 01 00 00 49 ff c5 4d 8d 75 ff 4c 89 f0 48 c1 e8 06 49 8d 3c c4 be 08 00 00 00 e8 ac 5a 05 fe 31 f6 4d 0f a3 34 24 41 0f 93 c7 <40> 0f 92 c6 bf 02 00 00 00 e8 73 70 b4 fd 45 84 ff 74 12 41 0f b7
RSP: 0018:ffffc90003997b10 EFLAGS: 00000246
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffffffff83ce0444
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807d1608b8
RBP: ffff88807d160890 R08: ffff88807d1608bf R09: 1ffff1100fa2c117
R10: dffffc0000000000 R11: ffffed100fa2c118 R12: ffff88807d1608b0
R13: 000000000000007a R14: 0000000000000079 R15: 0000000000000001
FS:  00007fe7cc6dd6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000639c5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tomoyo_unix_entry security/tomoyo/network.c:573 [inline]
 tomoyo_check_unix_address+0x46c/0x7c0 security/tomoyo/network.c:605
 tomoyo_socket_connect_permission+0x186/0x270 security/tomoyo/network.c:709
 security_socket_connect+0x6c/0xa0 security/security.c:2260
 __sys_connect_file net/socket.c:2006 [inline]
 __sys_connect+0x30f/0x450 net/socket.c:2027
 __do_sys_connect net/socket.c:2037 [inline]
 __se_sys_connect net/socket.c:2034 [inline]
 __x64_sys_connect+0x76/0x80 net/socket.c:2034
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe7cb79acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe7cc6dd028 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007fe7cba15fa0 RCX: 00007fe7cb79acb9
RDX: 000000000000006e RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007fe7cb808bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe7cba16038 R14: 00007fe7cba15fa0 R15: 00007ffc90795058
 </TASK>