syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 27s! [kworker/u4:5:575]
Modules linked in:
irq event stamp: 132863
hardirqs last  enabled at (132862): [<ffff80008ad68de8>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline]
hardirqs last  enabled at (132862): [<ffff80008ad68de8>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95
hardirqs last disabled at (132863): [<ffff80008ad66a78>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline]
hardirqs last disabled at (132863): [<ffff80008ad66a78>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551
softirqs last  enabled at (128034): [<ffff80008002189c>] softirq_handle_end kernel/softirq.c:399 [inline]
softirqs last  enabled at (128034): [<ffff80008002189c>] __do_softirq+0xac8/0xce4 kernel/softirq.c:582
softirqs last disabled at (128036): [<ffff80008aad75f4>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (128036): [<ffff80008aad75f4>] batadv_tt_local_commit_changes+0x24/0x44 net/batman-adv/translation-table.c:3717
CPU: 0 PID: 575 Comm: kworker/u4:5 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x15c/0xcf8 kernel/locking/qspinlock.c:383
lr : queued_spin_lock_slowpath+0x168/0xcf8 kernel/locking/qspinlock.c:383
sp : ffff800098c77720
x29: ffff800098c777c0 x28: 1fffe0001b8a126a x27: 1ffff0001318eef0
x26: dfff800000000000 x25: 1fffe0001b8a126c x24: ffff800098c77740
x23: ffff800098c77780 x22: ffff70001318eee8 x21: 0000000000000001
x20: 0000000000000001 x19: ffff0000dc509350 x18: ffff0001b4015840
x17: ffff800125414000 x16: ffff8000809fd934 x15: 0000000000000001
x14: 1fffe0001b8a126a x13: 0000000000000000 x12: 0000000000000000
x11: ffff60001b8a126b x10: 1fffe0001b8a126a x9 : 0000000000000000
x8 : 0000000000000001 x7 : ffff80008aad75f4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008ae5db50
x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000001
Call trace:
 __cmpwait_case_8 arch/arm64/include/asm/cmpxchg.h:229 [inline]
 __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline]
 queued_spin_lock_slowpath+0x15c/0xcf8 kernel/locking/qspinlock.c:383
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x320/0x348 kernel/locking/spinlock_debug.c:116
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline]
 _raw_spin_lock_bh+0x50/0x60 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 batadv_tt_local_commit_changes+0x24/0x44 net/batman-adv/translation-table.c:3717
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:811 [inline]
 batadv_iv_ogm_schedule+0x1ec/0xdf0 net/batman-adv/bat_iv_ogm.c:868
 batadv_iv_send_outstanding_bat_ogm_packet+0x740/0x900 net/batman-adv/bat_iv_ogm.c:1712
 process_one_work+0x694/0x1204 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:2787
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860