rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P18540/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=52661, q=106 ncpus=2)
task:syz.1.5988 state:R running task stack:26048 pid:18540 tgid:18540 ppid:5822 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7078
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:stack_trace_consume_entry+0x93/0x170 kernel/stacktrace.c:89
Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 98 00 00 00 <8b> 43 0c 85 c0 75 57 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1
RSP: 0018:ffffc90004667428 EFLAGS: 00000246
RAX: 0000000000000007 RBX: ffffc90004667508 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff891c7468 RDI: ffffc90004667514
RBP: 0000000000000009 R08: ffffc9000466747c R09: ffffffff91a333aa
R10: ffffc90004667448 R11: 00000000000a1f8c R12: ffffffff8185d2c0
R13: ffffc90004667508 R14: 0000000000000000 R15: ffff888021788000
arch_stack_walk+0x86/0x100 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0x1080 mm/page_alloc.c:2659
__put_partials+0x14c/0x170 mm/slub.c:3157
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:385
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
call_usermodehelper_setup+0x9a/0x340 kernel/umh.c:362
kobject_uevent_env+0x168f/0x1870 lib/kobject_uevent.c:628
__kobject_del+0x168/0x1f0 lib/kobject.c:601
kobject_cleanup lib/kobject.c:680 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x327/0x5a0 lib/kobject.c:737
net_rx_queue_update_kobjects+0x478/0x5f0 net/core/net-sysfs.c:1178
remove_queue_kobjects net/core/net-sysfs.c:1953 [inline]
netdev_unregister_kobject+0x150/0x270 net/core/net-sysfs.c:2107
unregister_netdevice_many_notify+0x105d/0x1e60 net/core/dev.c:11562
unregister_netdevice_many net/core/dev.c:11590 [inline]
unregister_netdevice_queue+0x307/0x3f0 net/core/dev.c:11462
unregister_netdevice include/linux/netdevice.h:3192 [inline]
unregister_netdev+0x1c/0x30 net/core/dev.c:11608
sixpack_close+0x1e7/0x2f0 drivers/net/hamradio/6pack.c:661
tty_ldisc_close+0x111/0x1a0 drivers/tty/tty_ldisc.c:455
tty_ldisc_kill+0x8e/0x150 drivers/tty/tty_ldisc.c:613
tty_ldisc_release+0x116/0x2a0 drivers/tty/tty_ldisc.c:781
tty_release_struct+0x23/0xe0 drivers/tty/tty_io.c:1690
tty_release+0xe25/0x1410 drivers/tty/tty_io.c:1861
__fput+0x3f8/0xb60 fs/file_table.c:450
task_work_run+0x14e/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31d5985d29
RSP: 002b:00007ffdb8d69ec8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000004da2b RCX: 00007f31d5985d29
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f31d5b77ba0 R08: 0000000000000001 R09: 00007ffdb8d6a1bf
R10: 00007f31d5800000 R11: 0000000000000246 R12: 000000000004dac0
R13: 00007f31d5b76080 R14: 0000000000000032 R15: ffffffffffffffff
rcu: rcu_preempt kthread starved for 5359 jiffies! g52661 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:28320 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:217
Code: 8b 05 d5 c2 69 7e a9 00 01 ff 00 48 8b 34 24 74 1d f6 c4 01 74 43 a9 00 00 0f 00 75 3c a9 00 00 f0 00 75 35 8b 82 1c 16 00 00 <85> c0 74 2b 8b 82 f8 15 00 00 83 f8 02 75 20 48 8b 8a 00 16 00 00
RSP: 0018:ffffc900001e7090 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff9200003ce18 RCX: ffffffff89fdc95c
RDX: ffff88801d6e8000 RSI: ffffffff89fdc96d RDI: 0000000000000005
RBP: 0000000000000007 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002
R13: ffff888069a15ac0 R14: ffff888021394900 R15: ffff888065b38000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff885615baa CR3: 000000002f9f0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
nf_hook+0x5dd/0x7d0 include/linux/netfilter.h:255
NF_HOOK include/linux/netfilter.h:312 [inline]
__br_forward+0x1be/0x5b0 net/bridge/br_forward.c:115
deliver_clone+0x5b/0xa0 net/bridge/br_forward.c:131
maybe_deliver+0xa7/0x120 net/bridge/br_forward.c:190
br_flood+0x17e/0x5c0 net/bridge/br_forward.c:236
br_handle_frame_finish+0xda5/0x1c80 net/bridge/br_input.c:215
br_nf_hook_thresh+0x303/0x410 net/bridge/br_netfilter_hooks.c:1198
br_nf_pre_routing_finish_ipv6+0x76a/0xfb0 net/bridge/br_netfilter_ipv6.c:154
NF_HOOK include/linux/netfilter.h:314 [inline]
br_nf_pre_routing_ipv6+0x3ce/0x8c0 net/bridge/br_netfilter_ipv6.c:184
br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:536
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x9eb/0x1490 net/bridge/br_input.c:424
__netif_receive_skb_core.constprop.0+0xa76/0x4470 net/core/dev.c:5566
__netif_receive_skb_one_core+0xb1/0x1e0 net/core/dev.c:5670
__netif_receive_skb+0x1d/0x160 net/core/dev.c:5785
process_backlog+0x443/0x15f0 net/core/dev.c:6117
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6883
napi_poll net/core/dev.c:6952 [inline]
net_rx_action+0xa94/0x1010 net/core/dev.c:7074
handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
run_ksoftirqd kernel/softirq.c:950 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:942
smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
net_ratelimit: 42987 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:00:00, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:00:00, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:00:00, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:00:00, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:00:00, vlan:0)