rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P27061/1:b..l P27078/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=114877, q=154 ncpus=2)
task:kworker/u4:4 state:R running task stack:27728 pid:27078 tgid:27078 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xede/0x5b00 kernel/sched/core.c:6688
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7008
irqentry_exit+0x36/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:409 [inline]
RIP: 0010:batadv_nc_worker+0x1a3/0x10e0 net/batman-adv/network-coding.c:719
Code: c6 e8 b1 c0 3d f7 45 85 ff 58 0f 85 f6 0a 00 00 e8 32 c5 3d f7 48 89 d8 48 c1 e8 03 42 80 3c 30 00 0f 85 43 0e 00 00 4c 8b 2b <4d> 85 ed 0f 84 0a 07 00 00 e8 0f c5 3d f7 49 81 ed c8 01 00 00 0f
RSP: 0018:ffffc90003737ba8 EFLAGS: 00000246
RAX: 1ffff1100696b887 RBX: ffff888034b5c438 RCX: ffffffff8a4a4055
RDX: ffff88802a6b9dc0 RSI: ffffffff8a4a354e RDI: 0000000000000001
RBP: 0000000000000087 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000002 R12: ffff888024aa7d40
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001
process_one_work+0x8a4/0x15f0 kernel/workqueue.c:2636
process_scheduled_works kernel/workqueue.c:2709 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2790
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
task:syz-executor.0 state:R running task stack:25312 pid:27061 tgid:27056 ppid:5096 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xede/0x5b00 kernel/sched/core.c:6688
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6865
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1538 [inline]
zap_pmd_range mm/memory.c:1586 [inline]
zap_pud_range mm/memory.c:1615 [inline]
zap_p4d_range mm/memory.c:1636 [inline]
unmap_page_range+0x13ef/0x2b50 mm/memory.c:1657
unmap_single_vma+0x194/0x2b0 mm/memory.c:1703
unmap_vmas+0x22f/0x490 mm/memory.c:1747
exit_mmap+0x1c1/0xb60 mm/mmap.c:3309
__mmput+0x12a/0x4d0 kernel/fork.c:1367
mmput+0x62/0x70 kernel/fork.c:1389
copy_process+0x3459/0x9770 kernel/fork.c:2776
kernel_clone+0xfd/0x940 kernel/fork.c:2925
__do_sys_clone+0xba/0x100 kernel/fork.c:3068
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7ffbace7cae9
RSP: 002b:00007ffbadcb6078 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffbacf9bf80 RCX: 00007ffbace7cae9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000061282000
RBP: 00007ffbacec847a R08: 00000000200000c0 R09: 00000000200000c0
R10: 0000000020000080 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007ffbacf9bf80 R15: 00007ffd2ed7b9d8
rcu: rcu_preempt kthread starved for 10501 jiffies! g114877 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:27920 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xede/0x5b00 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6778
schedule_timeout+0x136/0x290 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1631
rcu_gp_kthread+0x245/0x380 kernel/rcu/tree.c:1830
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.6.0-next-20231113-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:113
Code: 08 ed c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 65 48 8b 05 08 88 81 75 48 8b 00 a8 08 75 0c 66 90 0f 00 2d d8 10 b8 00 fb f4 c3 0f 1f 40 00 0f b6 47 08 3c 01 74 0b 3c 02 74 05 8b 7f 04 eb
RSP: 0018:ffffffff8cc07d68 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8a821a95
RDX: 0000000000000001 RSI: ffff88814126b800 RDI: ffff88814126b864
RBP: ffff88814126b864 R08: 0000000000000001 R09: ffffed1017306dbd
R10: ffff8880b9836deb R11: 0000000000000000 R12: ffff888019af9000
R13: ffffffff8db1d6e0 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555930938 CR3: 000000003383c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0x83/0x500 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388
cpuidle_idle_call kernel/sched/idle.c:215 [inline]
do_idle+0x314/0x3f0 kernel/sched/idle.c:282
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:380
rest_init+0x16f/0x2b0 init/main.c:730
arch_call_rest_init+0x13/0x30 init/main.c:827
start_kernel+0x39e/0x480 init/main.c:1072
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555
x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x166/0x16b