rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7130/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=25489, q=3229 ncpus=2)
task:syz-executor state:R running task stack:28232 pid:7130 tgid:7130 ppid:5594 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5520 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7270
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7592
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:kasan_byte_accessible+0x15/0x30 mm/kasan/generic.c:210
Code: 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03 48 01 c7 <0f> b6 07 3c 07 0f 96 c0 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00
RSP: 0018:ffffc900059477d8 EFLAGS: 00000282
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffffff8288a4bb RDI: fffffbfff1dbd3a8
RBP: ffffffff8ede9d40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000004900465 R11: 0000000000000001 R12: ffffffff8288a4bb
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
__kasan_check_byte+0x13/0x50 mm/kasan/common.c:573
kasan_check_byte include/linux/kasan.h:402 [inline]
lock_acquire kernel/locking/lockdep.c:5860 [inline]
lock_acquire+0x132/0x370 kernel/locking/lockdep.c:5843
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
__update_page_owner_free_handle.isra.0+0x4b/0x4b0 mm/page_owner.c:301
__reset_page_owner+0x93/0x190 mm/page_owner.c:339
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4586 [inline]
slab_alloc_node mm/slub.c:4919 [inline]
__do_kmalloc_node mm/slub.c:5336 [inline]
__kmalloc_noprof+0x2c1/0x820 mm/slub.c:5362
_kmalloc_noprof include/linux/slab.h:992 [inline]
tomoyo_realpath_from_path+0xb6/0x690 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x276/0x460 security/tomoyo/file.c:827
tomoyo_path_symlink+0x97/0xe0 security/tomoyo/tomoyo.c:212
security_path_symlink+0x152/0x2d0 security/security.c:1502
filename_symlinkat+0x122/0x560 fs/namei.c:5817
__do_sys_symlinkat fs/namei.c:5839 [inline]
__se_sys_symlinkat fs/namei.c:5834 [inline]
__x64_sys_symlinkat+0x9c/0xe0 fs/namei.c:5834
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae5539d197
RSP: 002b:00007ffc32edf218 EFLAGS: 00000206 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fae5539d197
RDX: 00007fae55435fdd RSI: 00000000ffffff9c RDI: 00007ffc32edf2b0
RBP: 00007ffc32edf25c R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000003d
R13: 0000555561d9aa10 R14: 000000000003fc98 R15: 00007ffc32edf2b0
rcu: rcu_preempt kthread starved for 1606 jiffies! g25489 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:28072 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5520 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7270
__schedule_loop kernel/sched/core.c:7347 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7362
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2325
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6449 Comm: kworker/u8:14 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker
RIP: 0010:__orc_find+0x49/0xf0 arch/x86/kernel/unwind_orc.c:101
Code: 00 49 89 fe 48 89 f0 49 39 fc 72 7b 48 b9 00 00 00 00 00 fc ff df 49 89 ff 48 89 fd eb 0c 48 8d 6b 04 49 89 df 49 39 ec 72 4e <4c> 89 e2 48 29 ea 48 89 d6 48 c1 ea 3f 48 c1 fe 02 48 01 f2 48 d1
RSP: 0018:ffffc90000a080c0 EFLAGS: 00000202
RAX: ffffffff91f5d97a RBX: ffffffff9167219c RCX: dffffc0000000000
RDX: ffffffff827dbc65 RSI: 0000000000000000 RDI: ffffffff91672178
RBP: ffffffff91672178 R08: ffffffff91f5d9f2 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000017dbc R12: ffffffff91672198
R13: ffffffff827dbc2e R14: ffffffff91672178 R15: ffffffff91672178
FS: 0000000000000000(0000) GS:ffff888123c88000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fae553aed40 CR3: 0000000075894000 CR4: 00000000003526f0
Call Trace:
orc_find arch/x86/kernel/unwind_orc.c:238 [inline]
unwind_next_frame+0x2ec/0x2090 arch/x86/kernel/unwind_orc.c:510
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2678 [inline]
slab_free mm/slub.c:6372 [inline]
kfree+0x22b/0x6c0 mm/slub.c:6687
skb_kfree_head net/core/skbuff.c:1083 [inline]
skb_free_head+0xb9/0x160 net/core/skbuff.c:1095
skb_release_data+0x6c5/0x8e0 net/core/skbuff.c:1122
skb_release_all net/core/skbuff.c:1197 [inline]
__kfree_skb net/core/skbuff.c:1211 [inline]
consume_skb net/core/skbuff.c:1445 [inline]
consume_skb+0xc4/0x110 net/core/skbuff.c:1439
nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:60 [inline]
nft_synproxy_do_eval+0xa24/0xce0 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
nft_do_chain+0x2e5/0x19d0 net/netfilter/nf_tables_core.c:285
nft_do_chain_inet+0xf3/0x400 net/netfilter/nft_chain_filter.c:162
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xbf/0x220 net/netfilter/core.c:619
nf_hook.constprop.0+0x2a6/0x750 include/linux/netfilter.h:280
NF_HOOK include/linux/netfilter.h:323 [inline]
ip_local_deliver+0x163/0x1f0 net/ipv4/ip_input.c:262
dst_input include/net/dst.h:480 [inline]
ip_rcv_finish net/ipv4/ip_input.c:492 [inline]
NF_HOOK include/linux/netfilter.h:325 [inline]
NF_HOOK include/linux/netfilter.h:319 [inline]
ip_rcv+0x33a/0x3c0 net/ipv4/ip_input.c:612
__netif_receive_skb_one_core+0x197/0x1e0 net/core/dev.c:6264
__netif_receive_skb+0x1f/0x120 net/core/dev.c:6377
process_backlog+0x487/0x1600 net/core/dev.c:6728
__napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7787
napi_poll net/core/dev.c:7850 [inline]
net_rx_action+0xa40/0xf20 net/core/dev.c:8007
handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
do_softirq kernel/softirq.c:546 [inline]
do_softirq+0xaf/0xf0 kernel/softirq.c:533
__local_bh_enable_ip+0xff/0x120 kernel/softirq.c:473
local_bh_enable include/linux/bottom_half.h:33 [inline]
fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline]
kernel_fpu_end arch/x86/kernel/fpu/core.c:506 [inline]
kernel_fpu_end+0x64/0x80 arch/x86/kernel/fpu/core.c:499
blake2s_compress+0x78/0xf0 lib/crypto/x86/blake2s.h:42
blake2s_update+0xef/0x320 lib/crypto/blake2s.c:119
hmac.constprop.0+0x33f/0x480 drivers/net/wireguard/noise.c:332
kdf.constprop.0+0x209/0x280 drivers/net/wireguard/noise.c:375
mix_precomputed_dh drivers/net/wireguard/noise.c:426 [inline]
wg_noise_handshake_create_initiation+0x406/0x610 drivers/net/wireguard/noise.c:560
wg_packet_send_handshake_initiation+0x19c/0x360 drivers/net/wireguard/send.c:34
wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387
process_scheduled_works kernel/workqueue.c:3470 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3551
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245