rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=8f3c/1/0x4000000000000000 softirq=80537/80541 fqs=0
rcu: (detected by 0, t=10502 jiffies, g=68825, q=72 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16347 Comm: syz.6.1894 Not tainted 6.14.0-rc4-syzkaller-00248-g03d38806a902 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__lock_release kernel/locking/lockdep.c:5512 [inline]
RIP: 0010:lock_release+0x22e/0xa30 kernel/locking/lockdep.c:5872
Code: 85 75 05 00 00 83 3d 00 1e 9f 0e 00 0f 84 bf 03 00 00 49 8d b5 e8 0a 00 00 48 89 f0 48 c1 e8 03 48 89 44 24 48 42 0f b6 04 38 <84> c0 0f 85 78 05 00 00 8b 06 85 c0 0f 84 2e 02 00 00 48 89 34 24
RSP: 0018:ffffc90000a18a00 EFLAGS: 00000806
RAX: 0000000000000000 RBX: 0000000000000046 RCX: ffffc90000a18a03
RDX: 1ffff92000143150 RSI: ffff88802b62a8e8 RDI: ffffffff8c801c20
RBP: ffffc90000a18b30 R08: ffffffff903bc677 R09: 1ffffffff20778ce
R10: dffffc0000000000 R11: fffffbfff20778cf R12: 1ffff9200014314c
R13: ffff88802b629e00 R14: ffffffff9a8e1608 R15: dffffc0000000000
FS: 00007ff7953d56c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3d23d3 CR3: 000000004a8ae000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
debug_object_activate+0x3f7/0x580 lib/debugobjects.c:836
debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline]
debug_activate kernel/time/hrtimer.c:496 [inline]
enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1100
__run_hrtimer kernel/time/hrtimer.c:1818 [inline]
__hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1865
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 9e 1c 23 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 43 0d 8c f5 65 8b 05 94 7f 00 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc900033d7ba0 EFLAGS: 00000206
RAX: 58d55141ec842700 RBX: 1ffff9200067af78 RCX: ffffffff819d2a9a
RDX: dffffc0000000000 RSI: ffffffff8c2aa4a0 RDI: 0000000000000001
RBP: ffffc900033d7c30 R08: ffffffff94513847 R09: 1ffffffff28a2708
R10: dffffc0000000000 R11: fffffbfff28a2709 R12: dffffc0000000000
R13: 1ffff9200067af74 R14: ffffc900033d7bc0 R15: 0000000000000246
clock_was_set+0x686/0x810 kernel/time/hrtimer.c:984
do_settimeofday64+0x343/0x5e0 kernel/time/timekeeping.c:1381
__do_sys_clock_settime kernel/time/posix-timers.c:1135 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1119 [inline]
__x64_sys_clock_settime+0x23a/0x280 kernel/time/posix-timers.c:1119
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff79758d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff7953d5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007ff7977a6160 RCX: 00007ff79758d169
RDX: 0000000000000000 RSI: 00004000000002c0 RDI: 0000000000000000
RBP: 00007ff79760e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff7977a6160 R15: 00007ffc91625dd8
rcu: rcu_preempt kthread starved for 10502 jiffies! g68825 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:25400 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 15959 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller-00248-g03d38806a902 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_single+0x45f/0x1990 kernel/smp.c:679
Code: a7 34 0c 00 41 83 e4 01 75 16 e8 5c 30 0c 00 4d 89 fc 44 8b 7c 24 24 eb 46 e8 4d 30 0c 00 eb 3f 4d 89 fc 44 8b 7c 24 24 f3 90 <42> 0f b6 04 2b 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 2a 30 0c
RSP: 0018:ffffc90004827560 EFLAGS: 00000293
RAX: ffffffff81b58e96 RBX: 1ffff92000904ec9 RCX: ffff8880683d1e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900048276f8 R08: ffffffff81b58e59 R09: 1ffff92000904e78
R10: dffffc0000000000 R11: fffff52000904e79 R12: 1ffff92000904ec4
R13: dffffc0000000000 R14: ffffc90004827648 R15: 0000000000000000
FS: 0000555576189500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7ba3d76f98 CR3: 0000000063700000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_barrier+0x327/0x530 kernel/rcu/tree.c:3793
netdev_run_todo+0x37e/0xf30 net/core/dev.c:11212
nsim_destroy+0x3c3/0x620 drivers/net/netdevsim/netdev.c:1028
__nsim_dev_port_del+0x14b/0x1b0 drivers/net/netdevsim/dev.c:1428
nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline]
nsim_dev_reload_destroy+0x28a/0x490 drivers/net/netdevsim/dev.c:1661
nsim_drv_remove+0x58/0x160 drivers/net/netdevsim/dev.c:1676
device_remove drivers/base/dd.c:567 [inline]
__device_release_driver drivers/base/dd.c:1273 [inline]
device_release_driver_internal+0x4a9/0x7c0 drivers/base/dd.c:1296
bus_remove_device+0x34f/0x420 drivers/base/bus.c:579
device_del+0x57a/0x9b0 drivers/base/core.c:3854
device_unregister+0x20/0xc0 drivers/base/core.c:3895
nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline]
del_device_store+0x363/0x480 drivers/net/netdevsim/bus.c:226
kernfs_fop_write_iter+0x3a0/0x500 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0xacf/0xd10 fs/read_write.c:679
ksys_write+0x18f/0x2b0 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f22e918bc1f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007ffe82426240 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f22e918bc1f
RDX: 0000000000000001 RSI: 00007ffe82426290 RDI: 0000000000000005
RBP: 00007f22e920f4fd R08: 0000000000000000 R09: 00007ffe82426097
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffe82426290 R14: 00007f22e9ed4620 R15: 0000000000000003