watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [kworker/u4:7:4111]
Modules linked in:
irq event stamp: 1725992
hardirqs last  enabled at (1725991): [<ffff800011ab9f58>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (1725991): [<ffff800011ab9f58>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (1725992): [<ffff800011aba1a0>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (1721534): [<ffff8000081b691c>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (1721534): [<ffff8000081b691c>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (1721127): [<ffff8000081b6fb4>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (1721127): [<ffff8000081b6fb4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (1721127): [<ffff8000081b6fb4>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (1721127): [<ffff8000081b6fb4>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
CPU: 1 PID: 4111 Comm: kworker/u4:7 Not tainted 5.15.168-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: netns cleanup_net
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : csd_lock_wait kernel/smp.c:440 [inline]
pc : smp_call_function_single+0x268/0x4f8 kernel/smp.c:758
lr : csd_lock_wait kernel/smp.c:440 [inline]
lr : smp_call_function_single+0x280/0x4f8 kernel/smp.c:758
sp : ffff800020ac76c0
x29: ffff800020ac7760 x28: 1fffe00019c32369 x27: dfff800000000000
x26: ffff700004158edc x25: ffff800020ac7718 x24: ffff800020ac7708
x23: ffff800020ac7700 x22: ffff0000ce191b48 x21: 0000000000000011
x20: ffff800020ac7708 x19: 0000000000000000 x18: 1fffe0003683618e
x17: 1fffe0003683618e x16: ffff800011abbac4 x15: ffff800014b4fa40
x14: 1ffff0000295606a x13: 0000000000000000 x12: 0000000000000001
x11: 0000000000000001 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000011 x6 : 0000000000000000
x5 : ffff800020ac7720 x4 : ffff8000141c04c0 x3 : ffff80000840dabc
x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:252 [inline]
 __cmpwait arch/arm64/include/asm/cmpxchg.h:278 [inline]
 csd_lock_wait kernel/smp.c:440 [inline]
 smp_call_function_single+0x268/0x4f8 kernel/smp.c:758
 rcu_barrier+0x210/0x4b0 kernel/rcu/tree.c:4078
 netdev_run_todo+0x320/0xae0 net/core/dev.c:10626
 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:112
 ip_tunnel_delete_nets+0x2b8/0x308 net/ipv4/ip_tunnel.c:1152
 ipgre_exit_batch_net+0x30/0x40 net/ipv4/ip_gre.c:1039
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x5e0/0x9bc net/core/net_namespace.c:599
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870