rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 2634 jiffies s: 11381 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 3429 Comm: kworker/u8:6 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__hrtimer_run_queues+0x248/0xd50
Code: 00 00 00 48 89 44 24 20 49 8d 84 1f 90 00 00 00 48 89 44 24 18 49 8d 84 1f 88 00 00 00 48 89 84 24 90 00 00 00 4c 8b 64 24 28 <48> 8b 44 24 50 42 80 3c 28 00 74 0d 48 8d bc 24 e0 00 00 00 e8 5f
RSP: 0018:ffffc90000a183c0 EFLAGS: 00000006
RAX: ffffffff81823603 RBX: ffff8880b872cac8 RCX: ffff8880319f8000
RDX: 0000000000010100 RSI: 1ffff110170e5952 RDI: ffff8880752a1340
RBP: ffffc90000a18520 R08: ffff8880752a1357 R09: ffff8880752a1340
R10: dffffc0000000000 R11: ffffed100ea5426b R12: 1ffff110170e595b
R13: dffffc0000000000 R14: ffff8880752a1340 R15: ffff8880b872c880
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc72ceb8f98 CR3: 000000007bf7a000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline]
RIP: 0010:unwind_next_frame+0xcb1/0x22d0 arch/x86/kernel/unwind_orc.c:585
Code: 0c 00 00 4c 39 f0 0f 87 74 0c 00 00 4c 89 ef e8 a5 22 00 00 49 89 c6 48 bd 00 00 00 00 00 fc ff df 48 8b 44 24 30 80 3c 28 00 <48> 8b 5c 24 18 74 08 48 89 df e8 50 3b bd 00 4c 89 33 48 8b 44 24
RSP: 0018:ffffc90000a18730 EFLAGS: 00000246
RAX: 1ffff92000143109 RBX: ffffc90000a18810 RCX: 1ffff92000143100
RDX: ffffffff90a3c002 RSI: 0000000000000002 RDI: ffffc90000a18ff0
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffc90000a188f0
R10: dffffc0000000000 R11: ffffffff818090c0 R12: ffffc90000a19000
R13: ffffc90000a18ff0 R14: ffffffff8157803b R15: 1ffff92000143102
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:2342 [inline]
 slab_free mm/slub.c:4579 [inline]
 kmem_cache_free+0x1a2/0x420 mm/slub.c:4681
 put_pid+0xb5/0x120 kernel/pid.c:121
 proc_free_inode+0x4c/0xa0 fs/proc/inode.c:76
 rcu_do_batch kernel/rcu/tree.c:2567 [inline]
 rcu_core+0xaac/0x17a0 kernel/rcu/tree.c:2823
 handle_softirqs+0x2c7/0x980 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_nc_purge_paths+0x312/0x3b0 net/batman-adv/network-coding.c:471
 batadv_nc_worker+0x328/0x610 net/batman-adv/network-coding.c:720
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>