rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=d6b4/1/0x4000000000000000 softirq=72737/72738 fqs=1
	(detected by 1, t=10506 jiffies, g=111057, q=77 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11180 Comm: kworker/u4:20 Not tainted 6.1.0-rc3-syzkaller-00239-g10d916c86eca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__this_cpu_preempt_check+0x0/0x10 lib/smp_processor_id.c:65
Code: 74 24 30 48 c7 c7 40 be 0a 8b 31 c0 e8 cb e9 fd ff e8 0f a7 ff ff eb a5 e8 fd e7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <48> 89 fe 48 c7 c7 c0 bd 0a 8b e9 d1 fe ff ff cc eb 1e 0f 1f 00 48
RSP: 0018:ffffc90000007b18 EFLAGS: 00000046
RAX: 1ffff110098a5100 RBX: 1ffff92000000f7a RCX: 0000000080010002
RDX: 0000000000000000 RSI: ffffffff8aad7a20 RDI: ffffffff8aad7580
RBP: ffffc90000007c60 R08: dffffc0000000000 R09: fffffbfff1c4f116
R10: fffffbfff1c4f116 R11: 1ffffffff1c4f115 R12: dffffc0000000000
R13: 0000000000000046 R14: ffffc90000007bd0 R15: 1ffff92000000f70
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 000000007d927000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lockdep_recursion_inc kernel/locking/lockdep.c:461 [inline]
 lock_release+0x140/0x870 kernel/locking/lockdep.c:5687
 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:390 [inline]
 advance_sched+0x634/0x8c0 net/sched/sch_taprio.c:749
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3a6/0xfd0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x280 arch/x86/kernel/apic/apic.c:1113
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:382 [inline]
RIP: 0010:__rcu_read_unlock+0x2f/0x100 kernel/rcu/tree_plugin.h:421
Code: 41 55 41 54 53 49 bc 00 00 00 00 00 fc ff df 65 4c 8b 34 25 00 6f 02 00 4d 8d ae 3c 04 00 00 4c 89 eb 48 c1 eb 03 42 8a 04 23 <84> c0 75 5e 41 8b 6d 00 ff cd 42 8a 04 23 84 c0 75 67 41 89 6d 00
RSP: 0018:ffffc9000552fba0 EFLAGS: 00000a07
RAX: ffffffff8a18f700 RBX: 1ffff110098a5087 RCX: ffff88804c528000
RDX: 0000000000000000 RSI: ffffffff8b0abda0 RDI: ffffffff8b0abd60
RBP: ffff88804c008c80 R08: dffffc0000000000 R09: fffffbfff1ffb009
R10: fffffbfff1ffb009 R11: 1ffffffff1ffb008 R12: dffffc0000000000
R13: ffff88804c52843c R14: ffff88804c528000 R15: 0000000000000076
 rcu_read_unlock include/linux/rcupdate.h:770 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0x245/0x5b0 net/batman-adv/network-coding.c:719
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g111057 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:26552 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5191 [inline]
 __schedule+0x8fc/0xda0 kernel/sched/core.c:6503
 schedule+0xcb/0x190 kernel/sched/core.c:6579
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x309/0x1070 kernel/rcu/tree.c:1660
 rcu_gp_kthread+0xa5/0x390 kernel/rcu/tree.c:1859
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 31987 Comm: syz-executor.0 Not tainted 6.1.0-rc3-syzkaller-00239-g10d916c86eca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:csd_lock_wait kernel/smp.c:413 [inline]
RIP: 0010:smp_call_function_many_cond+0xe92/0x1420 kernel/smp.c:987
Code: 84 c0 75 74 45 8b 26 44 89 e6 83 e6 01 31 ff e8 e4 3d 0b 00 41 83 e4 01 75 0e e8 b9 39 0b 00 eb 4c 0f 1f 80 00 00 00 00 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 10 41 f7 06 01
RSP: 0018:ffffc9000d377500 EFLAGS: 00000293
RAX: ffffffff817e7cc2 RBX: 1ffff11017348419 RCX: ffff88805c9d0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000d3776a0 R08: ffffffff817e7c8c R09: fffffbfff1ffb00f
R10: fffffbfff1ffb00f R11: 1ffffffff1ffb00e R12: 0000000000000001
R13: 0000000000000000 R14: ffff8880b9a420c8 R15: ffff8880b9b3ae40
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555bd1848 CR3: 000000005fecb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:924 [inline]
 flush_tlb_mm_range+0x36a/0x5a0 arch/x86/mm/tlb.c:1010
 tlb_flush arch/x86/include/asm/tlb.h:20 [inline]
 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:426 [inline]
 tlb_flush_mmu+0x1b5/0xa70 mm/mmu_gather.c:262
 tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:363
 exit_mmap+0x2b1/0x670 mm/mmap.c:3101
 __mmput+0x114/0x3b0 kernel/fork.c:1185
 exit_mm+0x217/0x2f0 kernel/exit.c:516
 do_exit+0x5e7/0x2070 kernel/exit.c:807
 do_group_exit+0x1fd/0x2b0 kernel/exit.c:950
 get_signal+0x1743/0x1810 kernel/signal.c:2858
 arch_do_signal_or_restart+0x8d/0x750 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop+0x74/0x160 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f20c228b5a9
Code: Unable to access opcode bytes at 0x7f20c228b57f.
RSP: 002b:00007f20c2f4e218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f20c23abf88 RCX: 00007f20c228b5a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f20c23abf88
RBP: 00007f20c23abf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f20c23abf8c
R13: 00007ffd69fb13df R14: 00007f20c2f4e300 R15: 0000000000022000
 </TASK>