rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P379/1:b..l
(detected by 0, t=10502 jiffies, g=17613, q=276)
task:kworker/u4:3 state:R running task stack:22800 pid: 379 ppid: 2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
preempt_schedule_notrace+0xd9/0x120 kernel/sched/core.c:6650
preempt_schedule_notrace_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
rcu_is_watching+0x72/0xa0 kernel/rcu/tree.c:1124
rcu_read_lock include/linux/rcupdate.h:741 [inline]
inet_twsk_purge+0x126/0x820 net/ipv4/inet_timewait_sock.c:268
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x78e/0xba0 net/core/net_namespace.c:635
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: rcu_preempt kthread timer wakeup didn't happen for 10519 jiffies! g17613 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=10385
rcu: rcu_preempt kthread starved for 10520 jiffies! g17613 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28080 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2117
rcu_gp_fqs_loop+0x2be/0x11f0 kernel/rcu/tree.c:1972
rcu_gp_kthread+0x9a/0x370 kernel/rcu/tree.c:2145
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 14736 Comm: syz.3.3431 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1cd/0x250 kernel/rcu/tree_stall.h:487
print_other_cpu_stall+0x1110/0x1270 kernel/rcu/tree_stall.h:592
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3936 [inline]
rcu_sched_clock_irq+0x845/0x1120 kernel/rcu/tree.c:2619
update_process_times+0x193/0x200 kernel/time/timer.c:2021
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4b0/0xb60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x397/0x8b0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:101 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x68/0x290 mm/kasan/generic.c:189
Code: 89 fe 49 c1 ee 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 16 4c 8d 44 3e ff 4d 89 c1 49 c1 e9 03 4b 8d 1c 21 49 89 df 4d 29 df <49> 83 ff 10 7f 29 4d 85 ff 0f 84 38 01 00 00 4c 89 cb 48 f7 d3 4c
RSP: 0018:ffffc900051165b0 EFLAGS: 00000202
RAX: f3f3f3f8f1f1f101 RBX: ffffed100b5009b2 RCX: ffffffff815e51cd
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88805a804d88
RBP: ffffc90005116670 R08: ffff88805a804d8b R09: 1ffff1100b5009b1
R10: dffffc0000000000 R11: ffffed100b5009b1 R12: dffffc0000000001
R13: ffff88805a804d01 R14: 1ffff1100b5009b1 R15: 0000000000000001
instrument_atomic_read include/linux/instrumented.h:71 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
queued_spin_trylock include/asm-generic/qspinlock.h:63 [inline]
do_raw_spin_trylock+0x6d/0x190 kernel/locking/spinlock_debug.c:122
__raw_spin_trylock_bh include/linux/spinlock_api_smp.h:182 [inline]
_raw_spin_trylock_bh+0x21/0x70 kernel/locking/spinlock.c:146
spin_trylock_bh include/linux/spinlock.h:424 [inline]
tipc_sk_rcv+0x3b6/0x2a10 net/tipc/socket.c:2502
tipc_node_xmit+0x203/0xf70 net/tipc/node.c:1708
tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
tipc_node_distr_xmit+0x2c7/0x3f0 net/tipc/node.c:1788
tipc_sk_rcv+0x24ac/0x2a10 net/tipc/socket.c:2507
tipc_node_xmit+0x203/0xf70 net/tipc/node.c:1708
tipc_sk_push_backlog net/tipc/socket.c:1317 [inline]
tipc_sk_filter_connect net/tipc/socket.c:2261 [inline]
tipc_sk_filter_rcv+0x1b1f/0x30b0 net/tipc/socket.c:2370
tipc_sk_enqueue net/tipc/socket.c:2451 [inline]
tipc_sk_rcv+0x846/0x2a10 net/tipc/socket.c:2503
tipc_node_xmit+0x203/0xf70 net/tipc/node.c:1708
tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
tipc_node_distr_xmit+0x2c7/0x3f0 net/tipc/node.c:1788
tipc_sk_backlog_rcv+0x1aa/0x260 net/tipc/socket.c:2418
sk_backlog_rcv include/net/sock.h:1080 [inline]
__release_sock+0x1e6/0x460 net/core/sock.c:2730
release_sock+0x5b/0x1b0 net/core/sock.c:3273
sock_setsockopt+0x1ba3/0x2480 net/core/sock.c:1378
__sys_setsockopt+0x2f6/0x3d0 net/socket.c:2209
__do_sys_setsockopt net/socket.c:2224 [inline]
__se_sys_setsockopt net/socket.c:2221 [inline]
__x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2221
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa417cce1d9
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:00007fa41732e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fa417f55fa0 RCX: 00007fa417cce1d9
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fa417d65888 R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000180 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa417f56038 R14: 00007fa417f55fa0 R15: 00007ffe289ca4b8