rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 3398 jiffies s: 59049 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3 Comm: pool_workqueue_ Not tainted 6.10.0-rc5-syzkaller-01209-gaa77b1128016 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:235 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x8/0x90 kernel/kcov.c:290
Code: cc cc cc cc 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 4c 8b 04 24 <65> 48 8b 14 25 80 d5 03 00 65 8b 05 50 ab 6d 7e a9 00 01 ff 00 74
RSP: 0018:ffffc90000007ad8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007c30 R08: ffffffff8183832f R09: 1ffffffff1f5ba5d
R10: dffffc0000000000 R11: fffffbfff1f5ba5e R12: 1ffff1101728593b
R13: ffffffff8990ebe0 R14: ffff88807dd4d340 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f433b871cb2 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x53f/0xd50 kernel/time/hrtimer.c:1751
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:321 [inline]
RIP: 0010:handle_softirqs+0x1df/0x970 kernel/softirq.c:542
Code: 89 7c 24 70 0f b7 db 48 c7 c7 40 b0 c9 8b e8 48 a3 2f 0a 65 66 c7 05 96 d3 a9 7e 00 00 e8 e9 86 43 00 fb 49 c7 c4 c0 a0 00 8e ff ff ff ff 0f bc c3 41 89 c7 41 ff c7 0f 84 e6 03 00 00 89 5c
RSP: 0018:ffffc90000007e40 EFLAGS: 00000286
RAX: 85dd50d048294800 RBX: 0000000000000386 RCX: ffffffff947b4603
RDX: dffffc0000000000 RSI: ffffffff8bcabb40 RDI: ffffffff8c1fee00
RBP: ffffc90000007f50 R08: ffffffff8fadd2ef R09: 1ffffffff1f5ba5d
R10: dffffc0000000000 R11: fffffbfff1f5ba5e R12: ffffffff8e00a0c0
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000000fdc
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:synchronize_rcu+0x0/0x360 kernel/rcu/tree.c:3976
Code: e1 07 80 c1 03 38 c1 0f 8c 97 fe ff ff 4c 89 f7 e8 e5 64 7f 00 e9 8a fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48
RSP: 0018:ffffc90000087cb8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000010fa0 RCX: ffffffff947b4603
RDX: 0000000000000001 RSI: ffffffff8bcac820 RDI: ffffffff8c1fee00
RBP: ffffc90000087da0 R08: ffffffff947a1487 R09: 1ffffffff28f4290
R10: dffffc0000000000 R11: fffffbfff28f4291 R12: ffffffff9479fc38
R13: 1ffff92000010f9c R14: 0000000000000202 R15: ffffc90000087d00
lockdep_unregister_key+0x4b7/0x540 kernel/locking/lockdep.c:6475
wq_unregister_lockdep kernel/workqueue.c:4796 [inline]
pwq_release_workfn+0x6e0/0x840 kernel/workqueue.c:5099
kthread_worker_fn+0x500/0xaf0 kernel/kthread.c:842
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-....: (16 ticks this GP) idle=ebfc/1/0x4000000000000000 softirq=55697/55697 fqs=24
rcu: hardirqs softirqs csw/system
rcu: number: 0 0 0
rcu: cputime: 33275 0 8 ==> 36710(ms)
rcu: (detected by 1, t=10504 jiffies, g=64441, q=1008 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3 Comm: pool_workqueue_ Not tainted 6.10.0-rc5-syzkaller-01209-gaa77b1128016 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:206
Code: 8b 3d ac 2b 46 0c 48 89 de 5b e9 23 50 5a 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 80 d5 03 00 65 8b 15 50 ae 6d 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc90000007a08 EFLAGS: 00000002
RAX: ffffffff8990ecc5 RBX: 0000000000000001 RCX: ffff8880172a3c00
RDX: ffff8880172a3c00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8990ecb8 R09: fffff52000000f30
R10: dffffc0000000000 R11: fffff52000000f30 R12: 0000000000000002
R13: ffffffff8990ebe0 R14: ffff88807dd4d340 R15: ffff8880172a46c8
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f433b871cb2 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
advance_sched+0xe5/0xca0 net/sched/sch_taprio.c:925
__run_hrtimer kernel/time/hrtimer.c:1687 [inline]
__hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1751
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:321 [inline]
RIP: 0010:handle_softirqs+0x1df/0x970 kernel/softirq.c:542
Code: 89 7c 24 70 0f b7 db 48 c7 c7 40 b0 c9 8b e8 48 a3 2f 0a 65 66 c7 05 96 d3 a9 7e 00 00 e8 e9 86 43 00 fb 49 c7 c4 c0 a0 00 8e ff ff ff ff 0f bc c3 41 89 c7 41 ff c7 0f 84 e6 03 00 00 89 5c
RSP: 0018:ffffc90000007e40 EFLAGS: 00000286
RAX: 85dd50d048294800 RBX: 0000000000000386 RCX: ffffffff947b4603
RDX: dffffc0000000000 RSI: ffffffff8bcabb40 RDI: ffffffff8c1fee00
RBP: ffffc90000007f50 R08: ffffffff8fadd2ef R09: 1ffffffff1f5ba5d
R10: dffffc0000000000 R11: fffffbfff1f5ba5e R12: ffffffff8e00a0c0
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000000fdc
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:synchronize_rcu+0x0/0x360 kernel/rcu/tree.c:3976
Code: e1 07 80 c1 03 38 c1 0f 8c 97 fe ff ff 4c 89 f7 e8 e5 64 7f 00 e9 8a fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48
RSP: 0018:ffffc90000087cb8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000010fa0 RCX: ffffffff947b4603
RDX: 0000000000000001 RSI: ffffffff8bcac820 RDI: ffffffff8c1fee00
RBP: ffffc90000087da0 R08: ffffffff947a1487 R09: 1ffffffff28f4290
R10: dffffc0000000000 R11: fffffbfff28f4291 R12: ffffffff9479fc38
R13: 1ffff92000010f9c R14: 0000000000000202 R15: ffffc90000087d00
lockdep_unregister_key+0x4b7/0x540 kernel/locking/lockdep.c:6475
wq_unregister_lockdep kernel/workqueue.c:4796 [inline]
pwq_release_workfn+0x6e0/0x840 kernel/workqueue.c:5099
kthread_worker_fn+0x500/0xaf0 kernel/kthread.c:842
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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 215 jiffies! g64441 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:26576 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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:
CPU: 1 PID: 12 Comm: kworker/u8:1 Not tainted 6.10.0-rc5-syzkaller-01209-gaa77b1128016 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0x1865/0x29d0 kernel/smp.c:855
Code: 89 e6 83 e6 01 31 ff e8 a9 09 0c 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 54 05 0c 00 eb 38 f3 90 42 0f b6 04 23 <84> c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 38 05 0c 00 eb e4 44
RSP: 0018:ffffc90000117700 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff11017288c21 RCX: ffff8880172c5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900001178e0 R08: ffffffff818a21b7 R09: 1ffffffff25f78b0
R10: dffffc0000000000 R11: fffffbfff25f78b1 R12: dffffc0000000000
R13: ffff8880b9446108 R14: ffff8880b953f980 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd10e07ba8 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2069 [inline]
text_poke_bp_batch+0x726/0xb30 arch/x86/kernel/alternative.c:2341
text_poke_flush arch/x86/kernel/alternative.c:2470 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2477
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:826
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244