rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2428/1:b..l P17004/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=115033, q=177 ncpus=2)
task:syz-executor.0 state:R running task stack:27904 pid:17004 tgid:16994 ppid:13794 flags:0x00004002
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+0x1c37/0x3c10 mm/memory.c:1793
unmap_single_vma+0x194/0x2b0 mm/memory.c:1839
unmap_vmas+0x22f/0x490 mm/memory.c:1883
exit_mmap+0x1c1/0xb90 mm/mmap.c:3267
__mmput+0x12a/0x4d0 kernel/fork.c:1346
mmput+0x62/0x70 kernel/fork.c:1368
exit_mm kernel/exit.c:569 [inline]
do_exit+0x999/0x2c10 kernel/exit.c:865
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
get_signal+0x2616/0x2710 kernel/signal.c:2911
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c2987dca9
RSP: 002b:00007f5c2a6300c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f5c299ac050 RCX: 00007f5c2987dca9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f5c298c947e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f5c299ac050 R15: 00007ffce3487718
task:kworker/u8:9 state:R running task stack:22080 pid:2428 tgid:2428 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
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 ca 99 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:ffffc90009c979c0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92001392f3a RCX: 000000007452784f
RDX: 0000000000000001 RSI: ffffffff8b0cb100 RDI: ffffffff8b6f56e0
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]
inet_twsk_purge+0x126/0x8f0 net/ipv4/inet_timewait_sock.c:277
ops_exit_list+0x128/0x180 net/core/net_namespace.c:175
cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:637
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 10544 jiffies! g115033 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:27496 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: 56 Comm: kworker/0:1H Not tainted 6.9.0-rc6-syzkaller-00290-gb9158815de52 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: 0x0 (kblockd)
RIP: 0010:rcu_is_watching+0x5/0xc0 kernel/rcu/tree.c:696
Code: e8 e0 7e 67 09 65 8a 05 85 c4 8f 7e 0f b6 c0 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <53> 65 ff 05 3b a1 8f 7e e8 7e 7e 67 09 48 c7 c3 e8 7e 03 00 83 f8
RSP: 0018:ffffc9000131fcf8 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8194de16
RDX: fffffbfff1f3eabb RSI: 0000000000000008 RDI: ffffffff8f9f55d0
RBP: ffff88801c6fda00 R08: 0000000000000000 R09: fffffbfff1f3eaba
R10: ffffffff8f9f55d7 R11: 0000000000000000 R12: 000000000003d78c
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 0000000053592000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_irq_disable.constprop.0+0xe4/0x130 include/trace/events/preemptirq.h:36
preempt_schedule_irq+0x7c/0x90 kernel/sched/core.c:7069
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+0xc/0x150 kernel/sched/core.c:5874
Code: 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 e9
RSP: 0018:ffffc9000131fdf0 EFLAGS: 00000202
RAX: ffffffff946bbaa0 RBX: ffff88801c6fda00 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b0cae00 RDI: 0000000000000001
RBP: ffffed10038dfb40 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8f9f55d7 R11: 0000000000000000 R12: ffff88801c6fda2c
R13: ffff88801c6fda00 R14: ffffed1002c738e8 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