rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P13723/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=86001, q=115 ncpus=2)
task:syz-executor.3  state:R  running task     stack:24656 pid:13723 tgid:13722 ppid:10033  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5249 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6594
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6916
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:blk_cgroup_congested+0x115/0x220 block/blk-cgroup.c:2190
Code: 81 49 60 fd 48 8b 5d 00 4c 01 e3 48 89 df be 04 00 00 00 e8 dd 4b 60 fd 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 3c 8b 1b <31> ff 89 de e8 72 e6 f9 fc 85 db 75 4c 48 81 c5 10 01 00 00 48 89
RSP: 0018:ffffc90004137530 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff84999883
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888023480a50
RBP: ffffffff9498a320 R08: ffff888023480a53 R09: 1ffff1100469014a
R10: dffffc0000000000 R11: ffffed100469014b R12: 0000000000000a10
R13: ffffc90004137a78 R14: ffffffff8499979d R15: dffffc0000000000
 __folio_throttle_swaprate+0x84/0x1d0 mm/swapfile.c:3756
 folio_throttle_swaprate include/linux/swap.h:641 [inline]
 folio_prealloc+0x10a/0x170 mm/memory.c:1072
 alloc_anon_folio mm/memory.c:4498 [inline]
 do_anonymous_page mm/memory.c:4555 [inline]
 do_pte_missing mm/memory.c:3946 [inline]
 handle_pte_fault+0x257b/0x7040 mm/memory.c:5521
 __handle_mm_fault mm/memory.c:5664 [inline]
 handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5829
 faultin_page mm/gup.c:1290 [inline]
 __get_user_pages+0x6ef/0x1590 mm/gup.c:1589
 populate_vma_page_range+0x264/0x330 mm/gup.c:2029
 __mm_populate+0x27a/0x460 mm/gup.c:2132
 mm_populate include/linux/mm.h:3427 [inline]
 __do_sys_mlockall mm/mlock.c:766 [inline]
 __se_sys_mlockall+0x3e3/0x4d0 mm/mlock.c:742
 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: 0033:0x7f8df2a7d0a9
RSP: 002b:00007f8df380c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000097
RAX: ffffffffffffffda RBX: 00007f8df2bb3f80 RCX: 00007f8df2a7d0a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 00007f8df2aec074 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8df2bb3f80 R15: 00007ffdd16b97d8
 </TASK>
rcu: rcu_preempt kthread starved for 9043 jiffies! g86001 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:26448 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5249 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6594
 __schedule_loop kernel/sched/core.c:6671 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6686
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2020
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2222
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.10.0-rc4-next-20240621-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x35/0x90 kernel/kcov.c:311
Code: 0c 25 00 d6 03 00 65 8b 05 40 56 70 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 57 83 b9 1c 16 00 00 00 74 4e 8b 81 f8 15 00 00 <83> f8 03 75 43 48 8b 91 00 16 00 00 44 8b 89 fc 15 00 00 49 c1 e1
RSP: 0018:ffffc900001a7bf8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000035 RCX: ffff8880176b0000
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8184a8e6 R09: 1ffffffff1f5dbbd
R10: dffffc0000000000 R11: fffffbfff1f5dbbe R12: ffff8880b952d188
R13: 0000000000000001 R14: ffff8880b952d188 R15: ffff8880b9528358
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555b3e7ff040 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 can_stop_idle_tick+0xa6/0x1c0 kernel/time/tick-sched.c:1172
 tick_nohz_get_sleep_length+0x130/0x1f0 kernel/time/tick-sched.c:1355
 menu_select+0xbf9/0x1e70 drivers/cpuidle/governors/menu.c:279
 cpuidle_idle_call kernel/sched/idle.c:223 [inline]
 do_idle+0x30e/0x5d0 kernel/sched/idle.c:326
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
 start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x13e/0x147
 </TASK>