rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P15566/1:b..l P17660/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=147037, q=163 ncpus=2)
task:syz-executor.3 state:R running task stack:27120 pid:17660 tgid:17659 ppid:7017 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6925
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1674 [inline]
zap_pmd_range mm/memory.c:1722 [inline]
zap_pud_range mm/memory.c:1751 [inline]
zap_p4d_range mm/memory.c:1772 [inline]
unmap_page_range+0xbde/0x3c10 mm/memory.c:1793
unmap_single_vma+0x194/0x2b0 mm/memory.c:1839
unmap_vmas+0x22f/0x490 mm/memory.c:1883
unmap_region+0x1f3/0x420 mm/mmap.c:2310
do_vmi_align_munmap+0x11b3/0x1ad0 mm/mmap.c:2628
do_vmi_munmap+0x20b/0x450 mm/mmap.c:2696
__vm_munmap+0x145/0x3a0 mm/mmap.c:2972
__do_sys_munmap mm/mmap.c:2989 [inline]
__se_sys_munmap mm/mmap.c:2986 [inline]
__x64_sys_munmap+0x61/0x90 mm/mmap.c:2986
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f136507ddf7
RSP: 002b:00007f1365e79ea8 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f136507ddf7
RDX: 0000000000000000 RSI: 0000000008400000 RDI: 00007f135ae00000
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000050ed
R10: 000000002000a2c2 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f1365e79f80 R14: 00007f1365e79f40 R15: 00007f135ae00000
task:kworker/u8:3 state:R running task stack:25120 pid:15566 tgid:15566 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7068
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5722
Code: c1 05 0a 93 96 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90003527a78 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920006a4f51 RCX: 00000000ab33934c
RDX: 0000000000000001 RSI: ffffffff8b0cb100 RDI: ffffffff8b6f57a0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff27bba30
R10: ffffffff93ddd187 R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8d7b0e20 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline]
batadv_iv_ogm_schedule_buff+0x5ac/0x1500 net/batman-adv/bat_iv_ogm.c:825
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline]
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:861 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x31e/0x8d0 net/batman-adv/bat_iv_ogm.c:1712
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3267
process_scheduled_works kernel/workqueue.c:3348 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3429
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10558 jiffies! g147037 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:27568 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1663
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:1862
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 97 Comm: kworker/0:1H Not tainted 6.9.0-rc7-syzkaller-00012-gdccb07f2914c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: 0x0 (kblockd)
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x20 kernel/kcov.c:303
Code: 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 2a fe ff ff
RSP: 0018:ffffc90000007f40 EFLAGS: 00000046
RAX: 0000000000010001 RBX: 0000000000000002 RCX: ffffffff8198ca60
RDX: ffff888018f1da00 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff888068debc00 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000002 R11: 0000000000000003 R12: ffff888068debc28
R13: 0000000000000023 R14: ffff888018f1da00 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30d2b000 CR3: 000000005c48c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__refcount_sub_and_test include/linux/refcount.h:274 [inline]
__refcount_dec_and_test include/linux/refcount.h:307 [inline]
refcount_dec_and_test include/linux/refcount.h:325 [inline]
put_task_struct include/linux/sched/task.h:127 [inline]
do_bpf_send_signal+0xf3/0x1d0 kernel/trace/bpf_trace.c:839
irq_work_single+0x1bc/0x260 kernel/irq_work.c:221
irq_work_run_list+0x92/0xc0 kernel/irq_work.c:252
irq_work_run+0x58/0xd0 kernel/irq_work.c:261
__sysvec_irq_work+0x8c/0x410 arch/x86/kernel/irq_work.c:22
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x90/0xb0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5283
Code: a9 0a 00 00 44 8b 0d e7 24 41 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 69 82 36 00 fb 65 48 8b 1d 30 72 a5 7e <48> 8d bb f0 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90002577b30 EFLAGS: 00000206
RAX: 0000000000364e35 RBX: ffff888018f1da00 RCX: 1ffffffff1f3e279
RDX: 0000000000000000 RSI: ffffffff8b0cae00 RDI: ffffffff8b6f57a0
RBP: ffffc90002577b78 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f9f5657 R11: 0000000000000000 R12: ffff8880b943f7b8
R13: ffff888068debc00 R14: 0000000000000000 R15: ffff8880b943ea40
context_switch kernel/sched/core.c:5412 [inline]
__schedule+0xf1d/0x5d00 kernel/sched/core.c:6746
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7068
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count_add+0xb/0x150 kernel/sched/core.c:5861
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 c7 c0 a0 ba 6b 94 <55> 48 ba 00 00 00 00 00 fc ff df 48 89 c1 53 83 e0 07 89 fb 48 c1
RSP: 0018:ffffc90002577df8 EFLAGS: 00000202
RAX: ffffffff946bbaa0 RBX: ffff888018f1da00 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b0cae00 RDI: 0000000000000001
RBP: ffffed10031e3b40 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8f9f5657 R11: 0000000000000000 R12: ffff888018f1da2c
R13: ffff888018f1da00 R14: ffffed100317a4c8 R15: fffffbfff1a81e40
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe0/0x350 kernel/sched/core.c:6838
worker_thread+0x2de/0xf70 kernel/workqueue.c:3444
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244