GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=9514/1/0x4000000000000000 softirq=37383/37384 fqs=5
rcu: (detected by 1, t=10502 jiffies, g=40257, q=699 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: kauditd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:advance_sched+0x38/0xd20 net/sched/sch_taprio.c:922
Code: 48 89 fb 48 83 ec 78 48 89 3c 24 e8 42 f8 41 f8 48 8d 7b 88 48 8d 4b 80 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 89 4c 24 48 <48> c1 ea 03 80 3c 02 00 0f 85 dc 0b 00 00 48 8b 04 24 48 8b 40 88
RSP: 0018:ffffc90000007de8 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8880345e3300 RCX: ffff8880345e3280
RDX: ffff8880345e3288 RSI: ffffffff89c8699e RDI: ffff8880345e3288
RBP: ffff88801f6d5608 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880345e3300
R13: ffffffff89c86980 R14: ffff8880b8428540 R15: ffff8880b8428590
FS: 0000000000000000(0000) GS:ffff888123dda000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09c835da08 CR3: 000000005233b000 CR4: 00000000003526f0
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:2032 [inline]
__hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2096
hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2215
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
__sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:console_flush_one_record+0xac3/0xe50 kernel/printk/printk.c:3270
Code: 00 e8 71 25 2a 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 bf d1 21 00 48 85 ed 0f 85 d7 01 00 00 e8 11 d7 21 00 fb 4c 89 e8 <48> c1 e8 03 42 80 3c 38 00 0f 85 64 03 00 00 48 8b 0c 24 48 8b 6b
RSP: 0018:ffffc90000a67980 EFLAGS: 00000293
RAX: ffffffff8f9ace58 RBX: ffffffff8f9ace00 RCX: ffffffff81e88ac1
RDX: ffff88801f6d4a80 RSI: ffffffff81e88acf RDI: ffff88801f6d4a80
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000f5e
R13: ffffffff8f9ace58 R14: ffffc90000a67a00 R15: dffffc0000000000
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
kauditd_printk_skb kernel/audit.c:588 [inline]
kauditd_hold_skb.cold+0x3f/0x4e kernel/audit.c:623
kauditd_send_queue+0x232/0x2e0 kernel/audit.c:808
kauditd_thread+0x645/0xb30 kernel/audit.c:932
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: rcu_preempt kthread starved for 10491 jiffies! g40257 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:28352 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x125c/0x6730 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7326
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2325
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 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:
CPU: 1 UID: 0 PID: 1660 Comm: kworker/u8:7 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0x5b2/0x1870 kernel/smp.c:912
Code: 44 9a 0c 00 f3 90 41 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 a8 10 00 00 8b 45 08 31 ff 83 e0 01 41 89 c6 89 c6 e8 8e 94 0c 00 <45> 85 f6 75 d0 e8 14 9a 0c 00 e8 0f 9a 0c 00 83 c3 01 bf 07 00 00
RSP: 0018:ffffc90006827858 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fdc7c2
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88802c180000
RBP: ffff8880b8443680 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003
R13: ffffed10170886d1 R14: 0000000000000001 R15: ffff8880b853c880
FS: 0000000000000000(0000) GS:ffff888123eda000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09c7827dac CR3: 000000000e994000 CR4: 00000000003526f0
Call Trace:
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1077
on_each_cpu include/linux/smp.h:72 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline]
smp_text_poke_batch_finish+0x337/0xc60 arch/x86/kernel/alternative.c:2983
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x37a/0x550 kernel/jump_label.c:910
static_key_enable_cpuslocked+0x1bc/0x270 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate mm/kfence/core.c:911 [inline]
toggle_allocation_gate+0xfe/0x2d0 mm/kfence/core.c:903
process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
process_scheduled_works kernel/workqueue.c:3405 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [kworker/u8:7:1660]
Modules linked in:
irq event stamp: 4019562
hardirqs last enabled at (4019561): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline]
hardirqs last enabled at (4019561): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:542 [inline]
hardirqs last enabled at (4019561): [] irqentry_exit+0x24d/0xa00 kernel/entry/common.c:167
hardirqs last disabled at (4019562): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062
softirqs last enabled at (4019560): [] __do_softirq kernel/softirq.c:656 [inline]
softirqs last enabled at (4019560): [] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last enabled at (4019560): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
softirqs last disabled at (4019539): [] __do_softirq kernel/softirq.c:656 [inline]
softirqs last disabled at (4019539): [] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last disabled at (4019539): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
CPU: 1 UID: 0 PID: 1660 Comm: kworker/u8:7 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0x593/0x1870 kernel/smp.c:912
Code: 00 fc ff df 48 8b 54 24 08 49 89 d5 49 89 d4 49 c1 ed 03 41 83 e4 07 49 01 c5 41 83 c4 03 e8 44 9a 0c 00 f3 90 41 0f b6 45 00 <41> 38 c4 7c 08 84 c0 0f 85 a8 10 00 00 8b 45 08 31 ff 83 e0 01 41
RSP: 0018:ffffc90006827858 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fdc7c2
RDX: ffff88802c180000 RSI: ffffffff81fdc79c RDI: ffff88802c180000
RBP: ffff8880b8443680 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003
R13: ffffed10170886d1 R14: 0000000000000001 R15: ffff8880b853c880
FS: 0000000000000000(0000) GS:ffff888123eda000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09c7827dac CR3: 000000000e994000 CR4: 00000000003526f0
Call Trace:
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1077
on_each_cpu include/linux/smp.h:72 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline]
smp_text_poke_batch_finish+0x337/0xc60 arch/x86/kernel/alternative.c:2983
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x37a/0x550 kernel/jump_label.c:910
static_key_enable_cpuslocked+0x1bc/0x270 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate mm/kfence/core.c:911 [inline]
toggle_allocation_gate+0xfe/0x2d0 mm/kfence/core.c:903
process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
process_scheduled_works kernel/workqueue.c:3405 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: kauditd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: f6 f0 5e 00 48 89 df 5b e9 1d 6c 64 00 be 03 00 00 00 5b e9 c2 c4 13 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 8b 05 45 fe 59 12 48 8b 34 24 65 48 8b 15 21 fe 59
RSP: 0018:ffffc90000007e90 EFLAGS: 00000002
RAX: 0000000000010001 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000010002 RSI: 0000000000000004 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffed1017085080
R10: ffff8880b8428403 R11: 0000000000000000 R12: ffff8880345e3300
R13: ffffffff89c86980 R14: ffff8880b8428540 R15: ffff8880b8428590
FS: 0000000000000000(0000) GS:ffff888123dda000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09c835da08 CR3: 000000005233b000 CR4: 00000000003526f0
Call Trace:
trace_hrtimer_expire_entry include/trace/events/timer.h:261 [inline]
__run_hrtimer kernel/time/hrtimer.c:2029 [inline]
__hrtimer_run_queues+0x385/0x9c0 kernel/time/hrtimer.c:2096
hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2215
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
__sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:console_flush_one_record+0xac3/0xe50 kernel/printk/printk.c:3270
Code: 00 e8 71 25 2a 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 bf d1 21 00 48 85 ed 0f 85 d7 01 00 00 e8 11 d7 21 00 fb 4c 89 e8 <48> c1 e8 03 42 80 3c 38 00 0f 85 64 03 00 00 48 8b 0c 24 48 8b 6b
RSP: 0018:ffffc90000a67980 EFLAGS: 00000293
RAX: ffffffff8f9ace58 RBX: ffffffff8f9ace00 RCX: ffffffff81e88ac1
RDX: ffff88801f6d4a80 RSI: ffffffff81e88acf RDI: ffff88801f6d4a80
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000f5e
R13: ffffffff8f9ace58 R14: ffffc90000a67a00 R15: dffffc0000000000
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
kauditd_printk_skb kernel/audit.c:588 [inline]
kauditd_hold_skb.cold+0x3f/0x4e kernel/audit.c:623
kauditd_send_queue+0x232/0x2e0 kernel/audit.c:808
kauditd_thread+0x645/0xb30 kernel/audit.c:932
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245