watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [kworker/u4:3:347]
Modules linked in:
irq event stamp: 1232458
hardirqs last  enabled at (1232457): [<ffff800011258dd8>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (1232457): [<ffff800011258dd8>] exit_to_kernel_mode+0xe0/0x168 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (1232458): [<ffff800011259030>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (1227338): [<ffff80000819fb84>] softirq_handle_end kernel/softirq.c:419 [inline]
softirqs last  enabled at (1227338): [<ffff80000819fb84>] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604
softirqs last disabled at (1227255): [<ffff8000081a0188>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (1227255): [<ffff8000081a0188>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (1227255): [<ffff8000081a0188>] invoke_softirq kernel/softirq.c:457 [inline]
softirqs last disabled at (1227255): [<ffff8000081a0188>] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659
CPU: 0 PID: 347 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
Workqueue: netns cleanup_net
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : csd_lock_wait kernel/smp.c:440 [inline]
pc : smp_call_function_single+0x230/0x4bc kernel/smp.c:758
lr : csd_lock_wait kernel/smp.c:440 [inline]
lr : smp_call_function_single+0x248/0x4bc kernel/smp.c:758
sp : ffff80001f6576a0
x29: ffff80001f657720 x28: 1fffe00018fe5001 x27: dfff800000000000
x26: ffff700003ecaed4 x25: 0000000000000000 x24: 0000000000000001
x23: ffff80001f6576c0 x22: ffff0000c7f28008 x21: 0000000000000011
x20: ffff80001f6576c8 x19: 0000000000000000 x18: 1fffe000341f0596
x17: 1fffe000341f0596 x16: ffff80001125a830 x15: ffff80001433ed40
x14: 0000000000000001 x13: 1ffff00003ecaed9 x12: 0000000000ff0100
x11: 0000000000000001 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000011 x6 : 0000000000000000
x5 : ffff80001f6576e0 x4 : ffff800013c81380 x3 : ffff8000083cffec
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+0x230/0x4bc kernel/smp.c:758
 rcu_barrier+0x140/0x494 kernel/rcu/tree.c:4082
 netdev_run_todo+0x29c/0x9e8 net/core/dev.c:10688
 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:112
 ip6gre_exit_batch_net+0x420/0x474 net/ipv6/ip6_gre.c:1658
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x654/0xaa4 net/core/net_namespace.c:635
 process_one_work+0x79c/0x1138 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x1034 kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:856