rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=43d4/1/0x4000000000000000 softirq=67992/67995 fqs=17
rcu: 	(detected by 0, t=10506 jiffies, g=56433, q=461 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16365 Comm: syz.8.2998 Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:advance_sched+0x586/0xca0 net/sched/sch_taprio.c:961
Code: 8b 34 fe 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 3b 16 2c f8 4c 8b 23 4c 89 f7 4c 89 e6 e8 5d 30 c1 f7 4d 39 e6 <75> 25 e8 f3 2d c1 f7 48 bb ff ff ff ff ff ff ff 7f 49 bc 00 00 00
RSP: 0018:ffffc90000a18c70 EFLAGS: 00000087
RAX: 0000000000010000 RBX: ffff88807a399d30 RCX: ffff888026b6bc00
RDX: ffff888026b6bc00 RSI: 0000000004000000 RDI: 0000000000000000
RBP: 1ffff1100f473780 R08: ffffffff89d4af23 R09: fffff5200014317c
R10: dffffc0000000000 R11: fffff5200014317c R12: 0000000004000000
R13: ffff88807a39bc00 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f73006606c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2c9aca CR3: 000000005a00e000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x420 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:__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 3e de 24 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> a3 08 88 f5 65 8b 05 94 ed 27 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc9000b9ef920 EFLAGS: 00000206
RAX: a46da2caac078000 RBX: 1ffff9200173df28 RCX: ffffffff81718fba
RDX: dffffc0000000000 RSI: ffffffff8c0ad8a0 RDI: 0000000000000001
RBP: ffffc9000b9ef9b0 R08: ffffffff9431f887 R09: 1ffffffff2863f10
R10: dffffc0000000000 R11: fffffbfff2863f11 R12: dffffc0000000000
R13: 1ffff9200173df24 R14: ffffc9000b9ef940 R15: 0000000000000246
 clock_was_set+0x686/0x810 kernel/time/hrtimer.c:959
 timekeeping_inject_offset+0x3d2/0x520 kernel/time/timekeeping.c:1480
 do_adjtimex+0x5b1/0xb10 kernel/time/timekeeping.c:2579
 do_clock_adjtime kernel/time/posix-timers.c:1165 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1177 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1168 [inline]
 __x64_sys_clock_adjtime+0x1e3/0x290 kernel/time/posix-timers.c:1168
 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: 0033:0x7f72ff77e819
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:00007f7300660038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f72ff935fa0 RCX: 00007f72ff77e819
RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000000
RBP: 00007f72ff7f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f72ff935fa0 R15: 00007ffe917761e8
 </TASK>
rcu: rcu_preempt kthread starved for 10420 jiffies! g56433 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:25976 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 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: 61 Comm: kworker/u8:4 Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f3/0x2ca0 kernel/smp.c:884
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 36 ea 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 e1 e5 0b 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 c5 e5
RSP: 0018:ffffc9000213dfa0 EFLAGS: 00000293
RAX: ffffffff8189f75b RBX: 1ffff110170e88c1 RCX: ffff88801c355a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000213e1a0 R08: ffffffff8189f72a R09: 1ffff92000427be4
R10: dffffc0000000000 R11: ffffffff8143d3f0 R12: dffffc0000000000
R13: ffff8880b8744608 R14: ffff8880b863f980 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c412588 CR3: 0000000066be4000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:938 [inline]
 flush_tlb_mm_range+0x329/0x5c0 arch/x86/mm/tlb.c:1024
 flush_tlb_page arch/x86/include/asm/tlbflush.h:254 [inline]
 ptep_clear_flush+0x11a/0x170 mm/pgtable-generic.c:101
 page_vma_mkclean_one+0x58a/0x9a0 mm/rmap.c:1051
 page_mkclean_one+0x280/0x420 mm/rmap.c:1092
 rmap_walk_file+0x531/0x9f0 mm/rmap.c:2708
 rmap_walk mm/rmap.c:2726 [inline]
 folio_mkclean+0x262/0x440 mm/rmap.c:1124
 folio_clear_dirty_for_io+0x22b/0xd00 mm/page-writeback.c:3033
 mpage_submit_folio+0x88/0x230 fs/ext4/inode.c:1913
 mpage_process_page_bufs+0x6c9/0x8d0 fs/ext4/inode.c:2045
 mpage_prepare_extent_to_map+0xec7/0x1c80 fs/ext4/inode.c:2546
 ext4_do_writepages+0xc4d/0x3d10 fs/ext4/inode.c:2688
 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2824
 do_writepages+0x361/0x880 mm/page-writeback.c:2702
 __writeback_single_inode+0x14f/0x10d0 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x80c/0x1370 fs/fs-writeback.c:1976
 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2047
 wb_writeback+0x427/0xbc0 fs/fs-writeback.c:2158
 wb_check_background_flush fs/fs-writeback.c:2228 [inline]
 wb_do_writeback fs/fs-writeback.c:2316 [inline]
 wb_workfn+0xc58/0x1090 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>