rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=db1c/1/0x4000000000000000 softirq=18014/18015 fqs=147
rcu: 	(detected by 0, t=10502 jiffies, g=11869, q=2731 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6152 Comm: syz-executor.0 Not tainted 6.16.0-rc1-syzkaller-gaef17cb3d3c4 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:advance_sched+0x979/0xc90 net/sched/sch_taprio.c:980
Code: 4c 89 75 00 48 89 df 4c 89 fe 48 8b 54 24 08 e8 3d 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 8c 24 80 00 00 00 80 3c 01 00 <48> 8b bc 24 88 00 00 00 74 05 e8 18 07 a3 f8 48 8b 44 24 08 49 89
RSP: 0018:ffffc90000a08c70 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff88807bbe42c0 RCX: 1ffff1100f77c865
RDX: 0000000000010000 RSI: 0000000000000004 RDI: ffff88806d19e084
RBP: ffff88806d19e150 R08: ffff88806d19e087 R09: 1ffff1100da33c10
R10: dffffc0000000000 R11: ffffed100da33c11 R12: ffff88807bbe4340
R13: ffff88807bbe4000 R14: 18480031301b0000 R15: ffff88806d19dc00
FS:  0000555562fb0480(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdc3f128d58 CR3: 0000000078dc0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:hrtimer_start_range_ns+0x0/0x1080 kernel/time/hrtimer.c:1313
Code: ff e8 d4 6d 73 00 e9 e3 fd ff ff 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 81 ec 80 00 00 00 41
RSP: 0018:ffffc90004d5fbf8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: ffff88807b000000 RCX: 0000000000000001
RDX: 000000000000c350 RSI: 00000000000f4240 RDI: ffffc90004d5fd40
RBP: ffffc90004d5fcf0 R08: ffff88807b00001b R09: 1ffff1100f600003
R10: dffffc0000000000 R11: ffffed100f600004 R12: 00000000000f4240
R13: ffffc90004d5fd80 R14: ffffc90004d5fd80 R15: ffffc90004d5fd40
 hrtimer_start_expires include/linux/hrtimer.h:277 [inline]
 hrtimer_sleeper_start_expires kernel/time/hrtimer.c:2023 [inline]
 do_nanosleep+0x191/0x600 kernel/time/hrtimer.c:2097
 hrtimer_nanosleep+0x169/0x360 kernel/time/hrtimer.c:2147
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1399 [inline]
 __se_sys_clock_nanosleep+0x2ee/0x380 kernel/time/posix-timers.c:1376
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc3e4a7ef5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffffe340360 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fdc3e4a7ef5
RDX: 00007ffffe3403a0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffffe34042c R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000017ffc R14: 0000000000017feb R15: 0000000000000003
 </TASK>
rcu: rcu_preempt kthread starved for 10208 jiffies! g11869 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:27192 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6878
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 6161 Comm: udevd Not tainted 6.16.0-rc1-syzkaller-gaef17cb3d3c4 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0xf69/0x12d0 kernel/smp.c:885
Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 50 78 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 fb 73 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 e0 73 0b
RSP: 0000:ffffc90004dbf720 EFLAGS: 00000293
RAX: ffffffff81b4da10 RBX: ffff8880b863c9c0 RCX: ffff888024831e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004dbf880 R08: ffffffff8f9fdef7 R09: 1ffffffff1f3fbde
R10: dffffc0000000000 R11: fffffbfff1f3fbdf R12: 1ffff110170e825d
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b87412e8
FS:  00007fa2533c2880(0000) GS:ffff888125c86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f4ffb700e8 CR3: 0000000078f76000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
 flush_tlb_mm_range+0x6b1/0x12c0 arch/x86/mm/tlb.c:1451
 flush_tlb_page arch/x86/include/asm/tlbflush.h:324 [inline]
 ptep_clear_flush+0x120/0x170 mm/pgtable-generic.c:101
 wp_page_copy mm/memory.c:3635 [inline]
 do_wp_page+0x1bc2/0x5800 mm/memory.c:4030
 handle_pte_fault mm/memory.c:6105 [inline]
 __handle_mm_fault+0x1144/0x5620 mm/memory.c:6232
 handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6401
 do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fa252cb5b69
Code: 10 48 81 f9 ff 03 00 00 76 28 48 8b 57 20 48 85 d2 74 1f 48 3b 7a 28 75 76 48 8b 4f 28 48 3b 79 20 75 6c 48 83 78 20 00 74 17 <48> 89 4a 28 48 89 51 20 48 83 c4 08 c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff24169340 EFLAGS: 00010206
RAX: 00007fa252df20e0 RBX: 000055f4ffb700c0 RCX: 000055f4ffb700c0
RDX: 000055f4ffb700c0 RSI: 00007fa252df20e0 RDI: 000055f4ffb700c0
RBP: 00007fa252df1ac0 R08: 0000000000002760 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000032b0
R13: 000055f4ffb73370 R14: 00000000000036f0 R15: 00007fa252df1ac0
 </TASK>