rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2681 jiffies s: 1769 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [kworker/u8:8:1909]
Modules linked in:
irq event stamp: 683350
hardirqs last  enabled at (683349): [<ffff80008ae6ff0c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline]
hardirqs last  enabled at (683349): [<ffff80008ae6ff0c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95
hardirqs last disabled at (683350): [<ffff80008ae6daf8>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline]
hardirqs last disabled at (683350): [<ffff80008ae6daf8>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551
softirqs last  enabled at (683342): [<ffff80008abae0dc>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (683342): [<ffff80008abae0dc>] batadv_nc_purge_paths+0x2f4/0x378 net/batman-adv/network-coding.c:471
softirqs last disabled at (683340): [<ffff80008abadeb8>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (683340): [<ffff80008abadeb8>] batadv_nc_purge_paths+0xd0/0x378 net/batman-adv/network-coding.c:442
CPU: 0 PID: 1909 Comm: kworker/u8:8 Not tainted 6.9.0-rc4-syzkaller-00050-g6a71d2909427 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: bat_events batadv_nc_worker
pstate: 60401005 (nZCv daif +PAN -UAO -TCO -DIT +SSBS BTYPE=--)
pc : lock_release+0x500/0x9cc
lr : lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lr : lock_release+0x4c4/0x9cc kernel/locking/lockdep.c:5776
sp : ffff80009c9b7960
x29: ffff80009c9b7a30 x28: ffff80008f0578c0 x27: dfff800000000000
x26: 1fffe000197b98dd x25: ffff0000cbdcc740 x24: ffff0000cbdcbc80
x23: ffff0000cbdcc6e8 x22: 00000000ffe2000e x21: 1159fb7df8fbe379
x20: 0000000000000002 x19: ffff0001b3dcadc0 x18: 1fffe000367b9596
x17: ffff80008ee7d000 x16: ffff80008ae726e0 x15: 0000000000000001
x14: ffff80008ee80668 x13: dfff800000000000 x12: 00000000200b73e2
x11: 0000000086507e00 x10: 0000000000ff0100 x9 : ffff80008edd1dc0
x8 : 0000000000000000 x7 : ffff80008abaf03c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : 0000000000000080 x0 : 0000000000000000
Call trace:
 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline]
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline]
 lock_release+0x500/0x9cc kernel/locking/lockdep.c:5777
 rcu_lock_release+0x2c/0x38 include/linux/rcupdate.h:339
 rcu_read_unlock include/linux/rcupdate.h:814 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0x260/0x580 net/batman-adv/network-coding.c:719
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3254
 process_scheduled_works kernel/workqueue.c:3335 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3416
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860