watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz.4.197:5153]
Modules linked in:
irq event stamp: 196510
hardirqs last  enabled at (196509): [<ffff800011abac64>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (196509): [<ffff800011abac64>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (196510): [<ffff800011abaeac>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (192036): [<ffff8000081b6d74>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (192036): [<ffff8000081b6d74>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (191935): [<ffff8000081b740c>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (191935): [<ffff8000081b740c>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (191935): [<ffff8000081b740c>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (191935): [<ffff8000081b740c>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
CPU: 1 PID: 5153 Comm: syz.4.197 Not tainted 5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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 : ffff80001cdb74c0
x29: ffff80001cdb7560 x28: 1fffe000198726d1 x27: dfff800000000000
x26: ffff7000039b6e9c x25: ffff80001cdb7518 x24: ffff80001cdb7508
x23: ffff80001cdb7500 x22: ffff0000cc393688 x21: 0000000000000011
x20: ffff80001cdb7508 x19: 0000000000000000 x18: 1fffe000368fab8e
x17: 1fffe000368fab8e x16: ffff800011abc7d0 x15: ffff800014b5ef00
x14: 1ffff0000295806a x13: 0000000000000000 x12: 0000000000000001
x11: 0000000000000001 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000011 x6 : 0000000000000000
x5 : ffff80001cdb7520 x4 : ffff8000141c2180 x3 : ffff80000840d968
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_wait_allrefs net/core/dev.c:10552 [inline]
 netdev_run_todo+0x67c/0xae0 net/core/dev.c:10641
 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:112
 tun_detach drivers/net/tun.c:705 [inline]
 tun_chr_close+0x148/0x20c drivers/net/tun.c:3440
 __fput+0x1c4/0x800 fs/file_table.c:280
 ____fput+0x20/0x30 fs/file_table.c:308
 task_work_run+0x130/0x1e4 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0x670/0x20bc kernel/exit.c:874
 do_group_exit+0x110/0x268 kernel/exit.c:996
 get_signal+0x634/0x1550 kernel/signal.c:2897
 do_signal arch/arm64/kernel/signal.c:890 [inline]
 do_notify_resume+0x3d0/0x32b8 arch/arm64/kernel/signal.c:943
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584