GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=b33c/1/0x4000000000000000 softirq=28492/28494 fqs=13
rcu: 	(detected by 0, t=10505 jiffies, g=33805, q=206 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5831 Comm: syz-executor Not tainted 6.13.0-syzkaller-06074-g2c8d2a510c15 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:122 [inline]
RIP: 0010:lock_release+0x109/0xa30 kernel/locking/lockdep.c:5864
Code: 38 84 c0 4c 8b 74 24 18 0f 85 1a 06 00 00 83 3d 1c ba 7f 0e 00 0f 84 55 05 00 00 65 8b 05 cf b3 67 7e 85 c0 0f 85 46 05 00 00 <65> 48 8b 04 25 80 d4 03 00 48 89 44 24 20 48 8d 98 dc 0a 00 00 48
RSP: 0018:ffffc90000a18b20 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff819ad660
RDX: 0000000000000000 RSI: ffffffff8c5f5400 RDI: ffffffff8c5f53c0
RBP: ffffc90000a18c60 R08: ffffffff901a5e37 R09: 1ffffffff2034bc6
R10: dffffc0000000000 R11: fffffbfff2034bc7 R12: 1ffff92000143170
R13: ffffffff89edf462 R14: ffffffff8e93a020 R15: dffffc0000000000
FS:  000055555d499500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7cbd579ef8 CR3: 0000000064744000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_lock_release include/linux/rcupdate.h:347 [inline]
 rcu_read_unlock include/linux/rcupdate.h:880 [inline]
 advance_sched+0xb32/0xca0 net/sched/sch_taprio.c:987
 __run_hrtimer kernel/time/hrtimer.c:1738 [inline]
 __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1802
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1864
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:32 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:123 [inline]
RIP: 0010:lock_release+0x19d/0xa30 kernel/locking/lockdep.c:5868
Code: 3b 00 74 08 4c 89 f7 e8 61 8e 88 00 4c 89 6c 24 50 48 c7 84 24 b0 00 00 00 00 00 00 00 9c 8f 84 24 b0 00 00 00 42 80 3c 3b 00 <74> 08 4c 89 f7 e8 49 8d 88 00 48 8b 9c 24 b0 00 00 00 fa 48 c7 c7
RSP: 0018:ffffc90003f270a0 EFLAGS: 00000246
RAX: ffffffff93e31710 RBX: 1ffff920007e4e2a RCX: ffffffff819ad660
RDX: 0000000000000000 RSI: ffffffff8c5f5400 RDI: ffffffff8c5f53c0
RBP: ffffc90003f271e0 R08: ffffffff901a5e37 R09: 1ffffffff2034bc6
R10: dffffc0000000000 R11: fffffbfff2034bc7 R12: 1ffff920007e4e20
R13: ffffffff822eed27 R14: ffffc90003f27150 R15: dffffc0000000000
 rcu_lock_release include/linux/rcupdate.h:347 [inline]
 rcu_read_unlock include/linux/rcupdate.h:880 [inline]
 page_ext_put+0xa3/0xc0 mm/page_ext.c:550
 __page_table_check_ptes_set+0x30f/0x410 mm/page_table_check.c:225
 page_table_check_ptes_set include/linux/page_table_check.h:74 [inline]
 set_ptes include/linux/pgtable.h:288 [inline]
 __copy_present_ptes mm/memory.c:968 [inline]
 copy_present_ptes mm/memory.c:1051 [inline]
 copy_pte_range mm/memory.c:1174 [inline]
 copy_pmd_range+0x450f/0x77a0 mm/memory.c:1262
 copy_pud_range mm/memory.c:1299 [inline]
 copy_p4d_range mm/memory.c:1323 [inline]
 copy_page_range+0x99f/0xe90 mm/memory.c:1421
 dup_mmap kernel/fork.c:748 [inline]
 dup_mm kernel/fork.c:1688 [inline]
 copy_mm+0x1279/0x2110 kernel/fork.c:1740
 copy_process+0x1845/0x3d50 kernel/fork.c:2391
 kernel_clone+0x223/0x870 kernel/fork.c:2803
 __do_sys_clone kernel/fork.c:2946 [inline]
 __se_sys_clone kernel/fork.c:2930 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2930
 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: 0033:0x7fdc62383593
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffefbb98dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdc62383593
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055555d4997d0 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000004bb55 R14: 00007ffefbb98f50 R15: 00000000000000c9
 </TASK>
rcu: rcu_preempt kthread starved for 10440 jiffies! g33805 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:26104 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x181a/0x4b90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 9324 Comm: syz.4.1135 Not tainted 6.13.0-syzkaller-06074-g2c8d2a510c15 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1ba4/0x2d30 kernel/smp.c:885
Code: 03 84 c0 75 7e 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 90 e8 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 40 e4 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00
RSP: 0018:ffffc90003d17880 EFLAGS: 00000293
RAX: ffffffff81b363c5 RBX: 1ffff110170e88b9 RCX: ffff88802b881e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003d17a80 R08: ffffffff81b36390 R09: 1ffffffff2858308
R10: dffffc0000000000 R11: fffffbfff2858309 R12: ffff8880b863f948
R13: ffff8880b87445c8 R14: ffff8880b863f940 R15: 0000000000000001
FS:  0000555590f45500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020349000 CR3: 0000000032832000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 000000000000000a DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2114 [inline]
 text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2324
 text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2522
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_disable_cpuslocked+0xd2/0x1c0 kernel/jump_label.c:240
 static_key_disable+0x1a/0x20 kernel/jump_label.c:248
 tracepoint_remove_func kernel/tracepoint.c:370 [inline]
 tracepoint_probe_unregister+0x83c/0xa10 kernel/tracepoint.c:504
 bpf_raw_tp_link_release+0x45/0x70 kernel/bpf/syscall.c:3614
 bpf_link_free+0xfd/0x3a0 kernel/bpf/syscall.c:3136
 bpf_link_put_direct kernel/bpf/syscall.c:3179 [inline]
 bpf_link_release+0x78/0x90 kernel/bpf/syscall.c:3186
 __fput+0x3e9/0x9f0 fs/file_table.c:450
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f85bfb8cd29
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:00007fff1d414a58 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000004bc27 RCX: 00007f85bfb8cd29
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f85bfda7ba0 R08: 0000000000000001 R09: 00007fff1d414d4f
R10: 00007f85bfa00000 R11: 0000000000000246 R12: 000000000004bc7e
R13: 00007f85bfda5fa0 R14: 0000000000000032 R15: ffffffffffffffff
 </TASK>