rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5644/3:b..l.. P4958/1:b..l.. P5637/1:b..l..
rcu: (detected by 0, t=10503 jiffies, g=12897, q=7 ncpus=2)
task:syz-executor415 state:R running task stack:26696 pid:5637 tgid:5637 ppid:5633 task_flags:0x400040 flags:0x00080800
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
_raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
wp_page_copy mm/memory.c:4171 [inline]
do_wp_page+0x3da8/0x4b60 mm/memory.c:4535
handle_pte_fault mm/memory.c:6651 [inline]
__handle_mm_fault mm/memory.c:6776 [inline]
handle_mm_fault+0x15d7/0x3750 mm/memory.c:6943
do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f71e46e7eca
RSP: 002b:00007ffc381653e0 EFLAGS: 00010246
RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00007f71e47a8500
RBP: 000000000000160c R08: 00007f71e47a8500 R09: 0000000000000000
R10: 000055559525d790 R11: 0000000000000246 R12: 0000000000000000
R13: 431bde82d7b634db R14: 00007f71e47a1440 R15: 00007ffc381655d0
task:kworker/0:3 state:R running task stack:28384 pid:4958 tgid:4958 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient gc_worker
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 b0 32 5e 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 b2 dc 1b 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 7a 1d 6c ff cc 48 8d 3d 37 87 fc
RSP: 0018:ffffc9000f36f940 EFLAGS: 00000292
RAX: 1df3c9e36d75da00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000a657c1f2 RSI: ffffffff8e92d156 RDI: ffffffff8c8e8c80
RBP: ffff88807fceddc0 R08: ffffffff8a1aa2e4 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff233adf8 R12: ffffffff8ff5a320
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
gc_worker+0x298/0x1890 net/netfilter/nf_conntrack_core.c:1530
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz-executor415 state:R running task stack:27912 pid:5644 tgid:5644 ppid:5637 task_flags:0x400040 flags:0x00080800
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
_raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
filemap_map_pages+0x1aba/0x2170 mm/filemap.c:4015
do_fault_around mm/memory.c:6027 [inline]
do_read_fault mm/memory.c:6060 [inline]
do_fault mm/memory.c:6203 [inline]
do_pte_missing+0x2067/0x3570 mm/memory.c:4763
handle_pte_fault mm/memory.c:6627 [inline]
__handle_mm_fault mm/memory.c:6776 [inline]
handle_mm_fault+0x1a53/0x3750 mm/memory.c:6943
do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f71e46f421f
RSP: 002b:00007ffc38164a78 EFLAGS: 00010287
RAX: 00000000000000cd RBX: 00007ffc38164fb0 RCX: 0000000000000000
RDX: 00007ffc38165078 RSI: 0000000000000025 RDI: 00007f71e47720cd
RBP: 00007ffc38165768 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc38165090
R13: 0000000000000000 R14: 00007f71e47720cd R15: 00007ffc38165078
rcu: rcu_preempt kthread starved for 10576 jiffies! g12897 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:28152 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5649 Comm: syz-executor415 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:sched_clock_cpu+0xc/0x440 kernel/sched/clock.c:395
Code: aa 2e 93 ff e9 90 09 70 ff cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 <41> 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 65 48 8b 05 74 c8
RSP: 0018:ffffc90000a08fa0 EFLAGS: 00000006
RAX: 0000000000000001 RBX: ffff8880b8324538 RCX: 8000000001000000
RDX: 0000000000000000 RSI: ffffffff8c8e8c60 RDI: 0000000000000001
RBP: ffffc90000a08fb0 R08: ffffffff919d6fbf R09: 1ffffffff233adf7
R10: dffffc0000000000 R11: ffffc90000a08ff8 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888036da0000 R15: ffffffff8e9767d8
FS: 00007f71e46cd6c0(0000) GS:ffff888123720000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 00000000278e0000 CR4: 0000000000350ef0
Call Trace:
irqtime_account_irq+0x66/0x260 kernel/sched/cputime.c:70
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x99/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:syscall_enter_from_user_mode_work include/linux/entry-common.h:144 [inline]
RIP: 0010:do_syscall_64+0xcd/0x520 arch/x86/entry/syscall_64.c:81
Code: 8b 05 5f 76 be 08 85 c0 75 0f 65 8b 05 d4 71 be 08 85 c0 0f 85 e7 02 00 00 0f 1f 44 00 00 90 90 e8 38 92 cf f5 fb 4d 8b 7d 08 <41> f6 c7 bf 74 73 41 f6 c7 20 74 10 4c 89 f7 e8 9f c1 af f5 84 c0
RSP: 0018:ffffc900038f7ef0 EFLAGS: 00000206
RAX: 0000000003c95c77 RBX: ffffc900038f7ef0 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8e6a2302 RDI: ffffffff8c8e8c80
RBP: ffffc900038f7f38 R08: ffffffff919d6fbf R09: 1ffffffff233adf7
R10: dffffc0000000000 R11: fffffbfff233adf8 R12: 0000000000000027
R13: ffff888036da0000 R14: ffffc900038f7f48 R15: 0000000000000000
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71e46f5937
Code: 02 08 00 ba 55 00 00 00 48 8d 35 a3 cc 07 00 48 8d 3d b3 cc 07 00 e8 38 dc fe ff e8 83 1f 00 00 0f 1f 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 41 56 31 c0 41 55 49 89 cd 41 54 49 89
RSP: 002b:00007f71e46ccb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007f71e46cccb0 RCX: 00007f71e46f5937
RDX: 00007f71e46ccb80 RSI: 00007f71e46cccb0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007f71e46cdcdc R09: 00007f71e46cdcdc
R10: 0000000000000000 R11: 0000000000000206 R12: 00007f71e47a7b2c
R13: 0000000000000000 R14: 00007ffc38165390 R15: 00007ffc38165478