rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5613/1:b..l P15318/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=61385, q=1317 ncpus=2)
task:syz.1.2768 state:R running task stack:26856 pid:15318 tgid:15317 ppid:5611 task_flags:0x40044c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7413
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0xe1/0x130 kernel/softirq.c:457
nl80211_netlink_notify+0x49c/0x860 net/wireless/nl80211.c:22961
notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85
blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:380
netlink_release+0x11f8/0x1a80 net/netlink/af_netlink.c:762
__sock_release net/socket.c:710 [inline]
sock_close+0xad/0x220 net/socket.c:1501
__fput+0x418/0xa50 fs/file_table.c:512
task_work_run+0x1d9/0x270 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x73a/0x2360 kernel/exit.c:1009
do_group_exit+0x22d/0x2f0 kernel/exit.c:1152
get_signal+0x121b/0x12c0 kernel/signal.c:3046
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5315d9e0d9
RSP: 002b:00007f5316bdf028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000000014 RBX: 00007f5316025fa0 RCX: 00007f5315d9e0d9
RDX: 0000000004000080 RSI: 0000200000000100 RDI: 0000000000000003
RBP: 00007f5315e35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5316026038 R14: 00007f5316025fa0 R15: 00007fffec7ac018
task:syz-executor state:R running task stack:22512 pid:5613 tgid:5613 ppid:5606 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 51 8d 2d 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 db c7 c9 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 80 8f 30 0a cc 48 8d 3d c8 0e b8
RSP: 0018:ffffc9000470ef60 EFLAGS: 00000286
RAX: dd2900a597db0300 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000714ef1ee RSI: ffffffff8e4ad3cc RDI: ffffffff8c4bba80
RBP: ffffffff8177827f R08: ffffffff8177827f R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002
R13: ffffffff8eb59c60 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xc1e/0xd10 mm/page_alloc.c:2950
__slab_free+0x274/0x2c0 mm/slub.c:5741
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:406
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_node_noprof+0x3ce/0x630 mm/slub.c:5508
_kmalloc_node_noprof include/linux/slab.h:1193 [inline]
__get_vm_area_node+0x136/0x300 mm/vmalloc.c:3215
__vmalloc_node_range_noprof+0x358/0x1730 mm/vmalloc.c:4042
__vmalloc_node_noprof mm/vmalloc.c:4143 [inline]
vzalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4221
alloc_counters+0x63/0x5c0 net/ipv4/netfilter/ip_tables.c:799
copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline]
get_entries net/ipv4/netfilter/ip_tables.c:1020 [inline]
do_ipt_get_ctl+0xb3c/0x1300 net/ipv4/netfilter/ip_tables.c:1669
nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
ip_getsockopt+0x19e/0x230 net/ipv4/ip_sockglue.c:1777
do_sock_getsockopt+0x51d/0x7e0 net/socket.c:2474
__sys_getsockopt net/socket.c:2505 [inline]
__do_sys_getsockopt net/socket.c:2512 [inline]
__se_sys_getsockopt net/socket.c:2509 [inline]
__x64_sys_getsockopt+0x1a4/0x240 net/socket.c:2509
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe5ed99f8aa
RSP: 002b:00007ffe1a400838 EFLAGS: 00000216 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007ffe1a4008c0 RCX: 00007fe5ed99f8aa
RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007ffe1a40085c R09: 0000000000000000
R10: 00007ffe1a4008c0 R11: 0000000000000216 R12: 00007fe5edbf1ac0
R13: 00007ffe1a40085c R14: 0000000000000000 R15: 00007fe5edbf2180
rcu: rcu_preempt kthread starved for 9483 jiffies! g61385 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:27496 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 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: 14568 Comm: kworker/R-bond2 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: bond2 bond_alb_monitor
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0xd8/0x130 kernel/softirq.c:457
Code: 8b e8 ec e3 47 0a 65 66 8b 05 9c 00 e4 11 66 85 c0 75 32 bf 01 00 00 00 e8 85 f0 0b 00 e8 a0 bd 46 00 fb 65 8b 05 78 00 e4 11 <85> c0 75 05 e8 3f df aa ff 5b 41 5e e9 17 c8 4a 0a cc 90 0f 0b 90
RSP: 0018:ffffc90000a07e28 EFLAGS: 00000206
RAX: 0000000080000100 RBX: 0000000000000200 RCX: 0000000080000100
RDX: 0000000000000000 RSI: ffffffff8e22860b RDI: ffffffff8c4bba80
RBP: ffffc90000a08040 R08: ffffffff90573837 R09: 1ffffffff20ae706
R10: dffffc0000000000 R11: fffffbfff20ae707 R12: ffff8880543e4910
R13: dffffc0000000000 R14: ffffffff8a922e21 R15: ffffffff90593500
FS: 0000000000000000(0000) GS:ffff888125058000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555586732a38 CR3: 000000007cdfa000 CR4: 00000000003526f0
Call Trace:
local_bh_enable include/linux/bottom_half.h:33 [inline]
ip6t_do_table+0x13c4/0x15b0 net/ipv6/netfilter/ip6_tables.c:375
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK+0x560/0x6e0 include/linux/netfilter.h:316
br_nf_forward_ip+0x7eb/0xa30 net/bridge/br_netfilter_hooks.c:721
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:316
__br_forward+0x397/0x540 net/bridge/br_forward.c:115
br_handle_frame_finish+0x1175/0x1990 net/bridge/br_input.c:229
br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0x90c/0xc40 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:318 [inline]
br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0x127f/0x1510 net/bridge/br_input.c:442
__netif_receive_skb_core+0x989/0x30b0 net/core/dev.c:6103
__netif_receive_skb_one_core net/core/dev.c:6214 [inline]
__netif_receive_skb net/core/dev.c:6329 [inline]
process_backlog+0x706/0x1860 net/core/dev.c:6680
__napi_poll+0xaa/0x330 net/core/dev.c:7739
napi_poll net/core/dev.c:7802 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:7959
handle_softirqs+0x225/0x840 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:process_one_work kernel/workqueue.c:3297 [inline]
RIP: 0010:process_scheduled_works+0x9ef/0x14e0 kernel/workqueue.c:3405
Code: 37 00 48 b8 00 00 00 00 00 fc ff df 48 8b 8c 24 98 00 00 00 80 3c 01 00 4c 8b 74 24 30 74 08 4c 89 f7 e8 64 6c a5 00 4d 8b 36 68 01 00 00 49 01 c6 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00
RSP: 0018:ffffc9000da17ae0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1100b1e3c01
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000da17ce0 R08: ffffffff90573837 R09: 1ffffffff20ae706
R10: dffffc0000000000 R11: fffffbfff20ae707 R12: ffff88801bbaf118
R13: dffffc0000000000 R14: ffff88807f99e000 R15: ffff88807efe9378
rescuer_thread+0x7b6/0x10b0 kernel/workqueue.c:3629
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245