rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=e9b4/1/0x4000000000000000 softirq=93447/93447 fqs=8
rcu: 	(detected by 0, t=10502 jiffies, g=142149, q=679 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 19259 Comm: syz.3.2354 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:kasan_check_range+0x1c8/0x2c0
Code: 49 01 dc 4d 01 f3 49 8d 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 0e 41 80 3b 00 75 7c 49 ff c3 49 ff cc 75 f2 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 45 84 ff 0f 85 a1 00
RSP: 0018:ffffc90000a08d08 EFLAGS: 00000056
RAX: 1ffff1102d636601 RBX: 0000000000000010 RCX: ffffffff8b9fc462
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffff88816b1b3318
RBP: 0000000000000000 R08: ffff88816b1b3327 R09: 1ffff1102d636664
R10: dffffc0000000000 R11: ffffed102d636665 R12: 0000000000000002
R13: dffffc0000000000 R14: ffffed102d636665 R15: 1ffff1102d636663
FS:  00007ff5400ab6c0(0000) GS:ffff8882a92a4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3161cff8 CR3: 0000000114aac000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __asan_memset+0x22/0x50
 rb_erase_linked+0x142/0x170
 __remove_hrtimer+0xf7/0x3e0
 __hrtimer_run_queues+0x295/0xa10
 hrtimer_interrupt+0x448/0x910
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:const_folio_flags+0xaa/0xf0
Code: f6 48 83 e6 40 31 ff e8 34 99 ba ff 49 83 e6 40 74 3b e8 49 94 ba ff eb 05 e8 42 94 ba ff 89 e8 48 c1 e0 06 48 01 c3 48 89 d8 <5b> 41 5e 41 5f 5d c3 cc cc cc cc cc e8 25 94 ba ff 48 89 df 48 c7
RSP: 0018:ffffc900038ce798 EFLAGS: 00000286
RAX: ffffea00044bb300 RBX: ffffea00044bb300 RCX: ffff88810df90000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffea00044bb307 R09: 1ffffd4000897660
R10: dffffc0000000000 R11: fffff94000897661 R12: ffffea00044bb300
R13: ffffea00044bb300 R14: 0000000000000000 R15: dffffc0000000000
 shrink_folio_list+0x3ded/0x5610
 reclaim_folio_list+0x100/0x430
 reclaim_pages+0x452/0x530
 madvise_cold_or_pageout_pte_range+0x1b70/0x21e0
 walk_pgd_range+0x100f/0x1e40
 __walk_page_range+0x16d/0x720
 walk_page_range_vma_unsafe+0x309/0x410
 madvise_vma_behavior+0x28cd/0x42e0
 madvise_walk_vmas+0x576/0xb00
 madvise_do_behavior+0x6f5/0x930
 do_madvise+0x327/0x3a0
 __x64_sys_madvise+0xa6/0xc0
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff53f19ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff5400ab028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007ff53f415fa0 RCX: 00007ff53f19ce59
RDX: 0000000000000015 RSI: 0000000000600000 RDI: 0000200000000000
RBP: 00007ff53f232e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff53f416038 R14: 00007ff53f415fa0 R15: 00007ffed8f914b8
 </TASK>
rcu: rcu_preempt kthread starved for 10486 jiffies! g142149 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:27696 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x1840/0x57a0
 schedule+0x164/0x360
 schedule_timeout+0x152/0x2c0
 rcu_gp_fqs_loop+0x30c/0x11f0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 19263 Comm: syz.2.2355 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:smp_call_function_many_cond+0x10b5/0x14b0
Code: 1e 89 de 83 e6 01 31 ff e8 f8 02 0c 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 07 e8 a4 fe 0b 00 eb 37 f3 90 41 0f b6 04 1c <84> c0 75 10 41 f7 06 01 00 00 00 74 1e e8 89 fe 0b 00 eb e5 44 89
RSP: 0018:ffffc90006acfb20 EFLAGS: 00000293
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff888169cdbb80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90006acfc48 R08: ffffffff902fe4f7 R09: 1ffffffff205fc9e
R10: dffffc0000000000 R11: fffffbfff205fc9f R12: 1ffff110478c81e1
R13: ffff88812103c4c8 R14: ffff88823c640f08 R15: 0000000000000001
FS:  000055558e56c500(0000) GS:ffff88818dca4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31616ff8 CR3: 00000001773d0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 blkdev_flush_mapping+0xff/0x2f0
 bdev_release+0x443/0x690
 blkdev_release+0x15/0x20
 __fput+0x418/0xa50
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0x193/0x6b0
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb37639ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc54307458 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffc54307540 RCX: 00007fb37639ce59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00000000000d4b92 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b30620000 R11: 0000000000000246 R12: 00007ffc54307580
R13: 00007fb376615fac R14: 00000000000d4ce7 R15: 00007fb376615fa0
 </TASK>
