rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5735/1:b..l
(detected by 1, t=10502 jiffies, g=13221, q=267)
task:syz-executor state:R running task stack:24512 pid: 5735 ppid: 5702 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:55 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [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+0x4a/0x290 mm/kasan/generic.c:189
Code: 48 c1 ed 2f 81 fd ff ff 01 00 0f 82 46 02 00 00 48 89 fb 48 c1 eb 03 49 b8 00 00 00 00 00 fc ff df 4e 8d 0c 03 4c 8d 54 37 ff <49> c1 ea 03 49 bb 01 00 00 00 00 fc ff df 4f 8d 34 1a 4c 89 f5 4c
RSP: 0018:ffffc9000302f3d8 EFLAGS: 00000a06
RAX: 0000000000000001 RBX: 1ffffffff1c150ed RCX: ffffffff8162cdec
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e0a8768
RBP: 000000000001ffff R08: dffffc0000000000 R09: fffffbfff1c150ed
R10: ffffffff8e0a876f R11: dffffc0000000001 R12: 1ffff92000605e88
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000605ec9
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
cpu_online include/linux/cpumask.h:895 [inline]
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0xcc/0x4f0 kernel/locking/lockdep.c:5594
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
rcu_read_lock include/linux/rcupdate.h:739 [inline]
is_bpf_text_address+0x1d/0x260 kernel/bpf/core.c:725
kernel_text_address kernel/extable.c:151 [inline]
__kernel_text_address+0x94/0x100 kernel/extable.c:105
unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc+0x168/0x300 mm/slub.c:4407
kmalloc include/linux/slab.h:596 [inline]
kzalloc include/linux/slab.h:721 [inline]
__register_sysctl_table+0xdc/0x1220 fs/proc/proc_sysctl.c:1317
sctp_sysctl_net_register+0x194/0x1f0 net/sctp/sysctl.c:606
sctp_defaults_init+0x4a3/0xb90 net/sctp/protocol.c:1389
ops_init+0x35d/0x610 net/core/net_namespace.c:138
setup_net+0x3ab/0xad0 net/core/net_namespace.c:333
copy_net_ns+0x392/0x5d0 net/core/net_namespace.c:486
create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x11e/0x170 kernel/nsproxy.c:226
ksys_unshare+0x531/0xa40 kernel/fork.c:3099
__do_sys_unshare kernel/fork.c:3173 [inline]
__se_sys_unshare kernel/fork.c:3171 [inline]
__x64_sys_unshare+0x34/0x40 kernel/fork.c:3171
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fcf1f6915e7
RSP: 002b:00007ffd0f18eaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007fcf1f8a8f40 RCX: 00007fcf1f6915e7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007fcf1f8a9738 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10447 jiffies! g13221 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:25688 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6549
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6574
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
_raw_spin_unlock_irqrestore+0x128/0x130 kernel/locking/spinlock.c:194
prepare_to_swait_event+0x321/0x340 kernel/sched/swait.c:120
rcu_gp_fqs_loop+0x28a/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:nf_ct_del_from_dying_or_unconfirmed_list net/netfilter/nf_conntrack_core.c:571 [inline]
RIP: 0010:nf_ct_destroy+0x289/0x540 net/netfilter/nf_conntrack_core.c:654
Code: 2f f9 48 89 5d 00 eb 05 e8 64 76 e5 f8 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 49 89 c5 74 08 4c 89 f7 e8 27 5f 2f f9 <48> b8 22 01 00 00 00 00 ad de 49 89 44 24 58 4c 89 ff e8 50 dd ad
RSP: 0018:ffffc90000d36810 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffe8ffffc3a7f0 RCX: ffff88813ff21dc0
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000080000003 R08: ffffffff889b0ef0 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff88802a388600
R13: dffffc0000000000 R14: ffff88802a388658 R15: ffffe8ffffc3a7a8
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff7ca52b98 CR3: 0000000061fb7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
nf_ct_put include/net/netfilter/nf_conntrack.h:188 [inline]
nf_ct_gc_expired+0x27c/0x4a0 net/netfilter/nf_conntrack_core.c:767
____nf_conntrack_find net/netfilter/nf_conntrack_core.c:793 [inline]
__nf_conntrack_find_get+0x29c/0x770 net/netfilter/nf_conntrack_core.c:823
resolve_normal_ct net/netfilter/nf_conntrack_core.c:1793 [inline]
nf_conntrack_in+0x88d/0x1cb0 net/netfilter/nf_conntrack_core.c:1960
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook+0x2a6/0x430 include/linux/netfilter.h:257
__ip_local_out+0x3b2/0x4f0 net/ipv4/ip_output.c:115
ip_local_out+0x26/0x120 net/ipv4/ip_output.c:124
iptunnel_xmit+0x513/0x950 net/ipv4/ip_tunnel_core.c:82
udp_tunnel_xmit_skb+0x1d0/0x2d0 net/ipv4/udp_tunnel_core.c:175
geneve_xmit_skb drivers/net/geneve.c:1006 [inline]
geneve_xmit+0x167a/0x3480 drivers/net/geneve.c:1119
__netdev_start_xmit include/linux/netdevice.h:5019 [inline]
netdev_start_xmit include/linux/netdevice.h:5033 [inline]
xmit_one net/core/dev.c:3617 [inline]
dev_hard_start_xmit+0x298/0x7a0 net/core/dev.c:3633
__dev_queue_xmit+0x1c8e/0x32b0 net/core/dev.c:4256
neigh_hh_output include/net/neighbour.h:493 [inline]
neigh_output include/net/neighbour.h:507 [inline]
ip6_finish_output2+0xead/0x15a0 net/ipv6/ip6_output.c:130
dst_output include/net/dst.h:443 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xae0/0x13c0 net/ipv6/ndisc.c:511
addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3959
call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287