rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=dc3c/1/0x4000000000000000 softirq=52232/52236 fqs=8
	(detected by 0, t=10505 jiffies, g=71361, q=265 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12974 Comm: syz.7.1878 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:240 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp8+0x4/0x80 kernel/kcov.c:289
Code: 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 04 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 90 48 8b 04 24 <65> 48 8b 0d b4 04 80 7e 65 8b 15 b5 04 80 7e 81 e2 00 01 ff 00 74
RSP: 0000:ffffc900001e0d08 EFLAGS: 00000046
RAX: ffffffff8a281bdd RBX: 0000000000000000 RCX: ffff88807e86da00
RDX: 0000000000010000 RSI: ffff88805495e340 RDI: ffff88805495e340
RBP: ffffc900001e0eb0 R08: ffffffff8f22416f R09: 1ffffffff1e4482d
R10: dffffc0000000000 R11: fffffbfff1e4482e R12: ffff88805495e340
R13: dffffc0000000000 R14: ffff8880b8d2a810 R15: ffff88805495e340
FS:  000055558c7bb500(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6e006157f8 CR3: 0000000056c4f000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 timerqueue_add+0x4d/0x1f0 lib/timerqueue.c:38
 __run_hrtimer kernel/time/hrtimer.c:1768 [inline]
 __hrtimer_run_queues+0x63e/0xc90 kernel/time/hrtimer.c:1815
 hrtimer_interrupt+0x399/0x980 kernel/time/hrtimer.c:1877
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:memset_erms+0xb/0x10 arch/x86/lib/memset_64.S:65
Code: 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 aa <4c> 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01
RSP: 0000:ffffc900061ef418 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc900061ef4c8 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc900061ef528
RBP: dffffc0000000000 R08: ffffc900061ef527 R09: ffffc900061ef518
R10: dffffc0000000000 R11: fffff52000c3dea5 R12: dffffc0000000000
R13: ffffc900061f0000 R14: ffffc900061ef500 R15: ffffc900061ef4fd
 unwind_next_frame+0x8da/0x1fd0 arch/x86/kernel/unwind_orc.c:546
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 save_stack+0x121/0x230 mm/page_owner.c:127
 __set_page_owner+0x19/0x60 mm/page_owner.c:190
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560
 prep_new_page mm/page_alloc.c:2567 [inline]
 get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658
 __folio_alloc+0xe/0x30 mm/page_alloc.c:5690
 vma_alloc_folio+0x499/0x900 mm/mempolicy.c:2245
 alloc_page_vma include/linux/gfp.h:284 [inline]
 wp_page_copy+0x24b/0x1660 mm/memory.c:3146
 handle_pte_fault mm/memory.c:5047 [inline]
 __handle_mm_fault mm/memory.c:5171 [inline]
 handle_mm_fault+0x1b1b/0x3d40 mm/memory.c:5292
 do_user_addr_fault+0x5a9/0xbb0 arch/x86/mm/fault.c:1338
 handle_page_fault arch/x86/mm/fault.c:1429 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f6e002528fc
Code: 23 83 c0 01 44 39 d0 75 dc 48 89 f0 25 ff 1f 00 00 49 89 34 c1 41 88 3c 00 31 c0 c3 66 90 41 38 3c 10 74 0b 41 88 3c 10 31 c0 <49> 89 34 d1 c3 b8 01 00 00 00 c3 66 0f 1f 84 00 00 00 00 00 48 83
RSP: 002b:00007ffd46b1f3a8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff81c0c6ff RCX: 0000000000000000
RDX: 00000000000006ff RSI: ffffffff81c0c6ff RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007f6e00610000 R09: 00007f6e00612000
R10: 0000000081c0c703 R11: 0000000000000000 R12: 00007f6e00626038
R13: 0000000000000004 R14: ffffffff81c0cd0e R15: 00007f6e01155720
 </TASK>
rcu: rcu_preempt kthread starved for 10465 jiffies! g71361 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:27440 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5257 [inline]
 __schedule+0x1089/0x4140 kernel/sched/core.c:6584
 schedule+0xb9/0x180 kernel/sched/core.c:6660
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x13a0 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x9a/0x400 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 11741 Comm: kworker/0:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Workqueue: events drain_vmap_area_work
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0x1148/0x1250 kernel/smp.c:998
Code: 41 8b 1f 89 de 83 e6 01 31 ff e8 b3 08 0b 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 0a e8 3f 05 0b 00 e9 34 ff ff ff f3 90 <41> 0f b6 04 1c 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 17 ff ff ff
RSP: 0018:ffffc90017587940 EFLAGS: 00000293
RAX: ffffffff81776383 RBX: dffffc0000000000 RCX: ffff88802eda1e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90017587aa0 R08: ffffffff91b6224f R09: 1ffffffff236c449
R10: dffffc0000000000 R11: fffffbfff236c44a R12: 1ffff110171a8219
R13: ffff8880b8c3bdc0 R14: 0000000000000001 R15: ffff8880b8d410c8
FS:  0000000000000000(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8cde227dac CR3: 000000006295c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1165
 __purge_vmap_area_lazy+0x21e/0x1920 mm/vmalloc.c:1818
 drain_vmap_area_work+0x3c/0xd0 mm/vmalloc.c:1868
 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>