kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299
watchdog: BUG: soft lockup - CPU#1 stuck for 226s! [kworker/u4:4:906]
Modules linked in:
CPU: 1 PID: 906 Comm: kworker/u4:4 Tainted: G W 5.15.153-syzkaller-00623-gda92e689a0c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: netns cleanup_net
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_single+0x278/0x510 kernel/smp.c:758
Code: 0f 85 18 02 00 00 44 8b 6c 24 48 44 89 ee 83 e6 01 31 ff e8 ca ba 0a 00 41 83 e5 01 75 0a e8 0f b7 0a 00 e9 eb 00 00 00 f3 90 <42> 0f b6 04 23 84 c0 75 15 f7 44 24 48 01 00 00 00 0f 84 cd 00 00
RSP: 0018:ffffc90000b378c0 EFLAGS: 00000293
RAX: ffffffff816593f4 RBX: 1ffff92000166f21 RCX: ffff888112dfa780
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000b379b0 R08: ffffffff816593c6 R09: ffffed103ee071d9
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc90000b37908 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011638f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_barrier+0x218/0x400 kernel/rcu/tree.c:4125
netdev_run_todo+0x14b/0x9f0 net/core/dev.c:10628
rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
ip_tunnel_delete_nets+0x340/0x380 net/ipv4/ip_tunnel.c:1138
ipip_exit_batch_net+0x22/0x30 net/ipv4/ipip.c:652
ops_exit_list net/core/net_namespace.c:174 [inline]
cleanup_net+0x6ce/0xc00 net/core/net_namespace.c:596
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3332 Comm: syz-executor Tainted: G W 5.15.153-syzkaller-00623-gda92e689a0c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:57 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:98 [inline]
RIP: 0010:kvm_wait+0x117/0x180 arch/x86/kernel/kvm.c:912
Code: 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 53 41 0f b6 45 00 44 38 f0 0f 85 63 ff ff ff 66 90 0f 00 2d ea fc 12 04 f4 54 ff ff ff fa 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b
RSP: 0018:ffffc90000007840 EFLAGS: 00000046
RAX: 0000000000000003 RBX: 1ffff92000000f0c RCX: 0000000087504200
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffffff87504280
RBP: ffffc900000078f0 R08: dffffc0000000000 R09: 0000000000000000
R10: fffffbfff0ea0850 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffffff87504280 R14: 0000000000000003 R15: 1ffff92000000f10
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011638f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x6bc/0xc40 kernel/locking/qspinlock.c:508
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock_flags include/linux/spinlock.h:199 [inline]
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irqsave+0x1a0/0x210 kernel/locking/spinlock.c:162
free_percpu+0x9e/0x1090 mm/percpu.c:2279
fib6_nh_release+0x3ab/0x3f0 net/ipv6/route.c:3679
fib6_info_destroy_rcu+0xc1/0x1b0 net/ipv6/ip6_fib.c:175
rcu_do_batch+0x57a/0xc10 kernel/rcu/tree.c:2523
rcu_core+0x517/0x1020 kernel/rcu/tree.c:2763
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776
__do_softirq+0x26d/0x5bf kernel/softirq.c:565
do_softirq+0xf6/0x150 kernel/softirq.c:452
__local_bh_enable_ip+0x75/0x80 kernel/softirq.c:379
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
_raw_spin_unlock_bh+0x51/0x60 kernel/locking/spinlock.c:210
__sock_map_delete net/core/sock_map.c:426 [inline]
sock_map_delete_elem+0xcb/0x130 net/core/sock_map.c:448
bpf_prog_2c29ac5cdc6b1842+0x3a/0x6c8
bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
bpf_trace_run3+0x11e/0x250 kernel/trace/bpf_trace.c:1918
__bpf_trace_percpu_free_percpu+0x2b/0x40 include/trace/events/percpu.h:43
__traceiter_percpu_free_percpu+0x7f/0xd0 include/trace/events/percpu.h:43
trace_percpu_free_percpu include/trace/events/percpu.h:43 [inline]
free_percpu+0xd12/0x1090 mm/percpu.c:2306
tun_free_netdev+0x75/0x1b0 drivers/net/tun.c:2285
netdev_run_todo+0x7c0/0x9f0 net/core/dev.c:10657
rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
tun_detach drivers/net/tun.c:705 [inline]
tun_chr_close+0xc4/0x140 drivers/net/tun.c:3435
__fput+0x3fe/0x910 fs/file_table.c:280
____fput+0x15/0x20 fs/file_table.c:308
task_work_run+0x129/0x190 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xc48/0x2ca0 kernel/exit.c:878
do_group_exit+0x141/0x310 kernel/exit.c:1000
__do_sys_exit_group kernel/exit.c:1011 [inline]
__se_sys_exit_group kernel/exit.c:1009 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1009
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd23bc00e79
Code: Unable to access opcode bytes at RIP 0x7fd23bc00e4f.
RSP: 002b:00007ffdcb6c5928 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd23bc00e79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 00007fd23bc60508 R08: 00007ffdcb6c36c7 R09: 0000000000000003
R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000003 R14: 00000000ffffffff R15: 00007ffdcb6c5ad0