rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4127/1:b..l
(detected by 0, t=10503 jiffies, g=120785, q=1434)
task:kworker/u4:8 state:R running task stack:21752 pid: 4127 ppid: 2 flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x30 kernel/rcu/update.c:279
Code: 5d 41 b5 03 00 75 e7 48 c7 c7 a0 29 8b 8a 48 c7 c6 60 4e 8b 8a e8 50 b1 17 f7 0f 0b eb d0 cc cc cc cc cc cc cc cc cc cc cc cc <31> c0 83 3d ab 0e b5 03 00 74 1d 83 3d 22 41 b5 03 00 74 14 65 48
RSP: 0018:ffffc90003207a58 EFLAGS: 00000293
RAX: ffffffff8a0c7bc2 RBX: 0000000000000000 RCX: ffff88807b248000
RDX: 0000000000000000 RSI: ffffffff8ad904a0 RDI: ffffffff8ad90460
RBP: ffffc90003207b98 R08: ffffffff8a0c79c9 R09: fffffbfff20e2419
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807474b800
R13: ffff888060123840 R14: ffff888079079650 R15: dffffc0000000000
rcu_read_unlock include/linux/rcupdate.h:768 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:772 [inline]
batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:826 [inline]
batadv_iv_ogm_schedule+0x63e/0x1000 net/batman-adv/bat_iv_ogm.c:869
batadv_iv_send_outstanding_bat_ogm_packet+0x6fa/0x800 net/batman-adv/bat_iv_ogm.c:1713
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: rcu_preempt kthread starved for 6799 jiffies! g120785 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:26752 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
schedule+0x11b/0x1f0 kernel/sched/core.c:6456
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 18286 Comm: syz.1.4629 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3932 [inline]
rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619
update_process_times+0x196/0x200 kernel/time/timer.c:1818
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x16c/0x1f0 kernel/softirq.c:390
Code: 8a e8 d8 e2 e6 08 65 66 8b 05 50 19 b6 7e 66 85 c0 75 57 bf 01 00 00 00 e8 c1 ed 09 00 e8 9c 5b 39 00 fb 65 8b 05 3c f0 b4 7e <85> c0 75 05 e8 0b 0d b3 ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c
RSP: 0018:ffffc90000007600 EFLAGS: 00000286
RAX: 0000000000000301 RBX: 1ffff92000000ec4 RCX: ffffffff81631ae8
RDX: dffffc0000000000 RSI: ffffffff8a8b2b00 RDI: ffffffff8ad904c0
RBP: ffffc900000076b8 R08: dffffc0000000000 R09: fffffbfff20e2437
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000000ec8 R14: ffffc90000007640 R15: 0000000000000201
neigh_hh_init net/core/neighbour.c:1479 [inline]
neigh_resolve_output+0x2e3/0x6d0 net/core/neighbour.c:1494
neigh_output include/net/neighbour.h:509 [inline]
ip6_finish_output2+0xee8/0x15a0 net/ipv6/ip6_output.c:130
dst_output include/net/dst.h:443 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xae0/0x13c0 net/ipv6/ndisc.c:511
addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3959
call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__tlb_remove_page_size+0x0/0x3e0 mm/mmu_gather.c:67
Code: 69 e9 8d e8 d2 5a 0e 00 48 89 1d 33 9f 2d 0c 48 c7 c7 60 92 94 8a 48 89 de e8 7c 58 77 08 e9 b8 fe ff ff cc cc cc cc cc cc cc <55> 41 57 41 56 41 55 41 54 53 48 83 ec 10 48 89 34 24 48 89 fd 49
RSP: 0018:ffffc90003877418 EFLAGS: 00000293
RAX: ffffffff81b868b1 RBX: ffff888056f15148 RCX: ffff888046b90000
RDX: 0000000000001000 RSI: ffffea0001f15140 RDI: ffffc900038777e0
RBP: ffffc90003877650 R08: ffffffff81b868a4 R09: fffff940003e2a2f
R10: 0000000000000000 R11: dffffc0000000001 R12: 00007fa6c5229000
R13: ffffea0001f15140 R14: ffffea0001f15148 R15: dffffc0000000000
__tlb_remove_page include/asm-generic/tlb.h:444 [inline]
zap_pte_range mm/memory.c:1376 [inline]
zap_pmd_range mm/memory.c:1494 [inline]
zap_pud_range mm/memory.c:1523 [inline]
zap_p4d_range mm/memory.c:1544 [inline]
unmap_page_range+0x10d8/0x2630 mm/memory.c:1565
unmap_vmas+0x1f8/0x390 mm/memory.c:1642
exit_mmap+0x3b6/0x670 mm/mmap.c:3186
__mmput+0x112/0x3b0 kernel/fork.c:1126
exit_mm+0x688/0x7f0 kernel/exit.c:550
do_exit+0x626/0x2480 kernel/exit.c:861
do_group_exit+0x144/0x310 kernel/exit.c:996
get_signal+0xc66/0x14e0 kernel/signal.c:2897
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa6c579dff9
Code: Unable to access opcode bytes at RIP 0x7fa6c579dfcf.
RSP: 002b:00007fa6c3c160e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007fa6c5955f88 RCX: 00007fa6c579dff9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fa6c5955f8c
RBP: 00007fa6c5955f80 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000000000052 R11: 0000000000000246 R12: 00007fa6c5955f8c
R13: 0000000000000000 R14: 00007ffc38f60ed0 R15: 00007ffc38f60fb8