rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P23255/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=100057, q=85 ncpus=2)
task:syz.1.7468      state:R  running task     stack:22800 pid:23255 tgid:23255 ppid:5602   task_flags:0x400640 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17db/0x58f0
 preempt_schedule_irq+0x4b/0x90
 irqentry_exit+0x14f/0x910
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x4c3/0x2550
Code: 01 4c 8b 6c 24 50 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 10 49 8d 6e 38 0f 84 8a 16 00 00 e9 ee 01 00 00 49 89 d5 49 89 d7 <4c> 89 e0 4c 29 f8 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83
RSP: 0018:ffffc9002c366000 EFLAGS: 00000297
RAX: ffffffff919c1cbc RBX: ffffffff919c1cc0 RCX: ffffffff919c1cc4
RDX: ffffffff919c1ca0 RSI: ffffffff921f2e2a RDI: ffffffff8c6dad20
RBP: ffffffff822a4568 R08: 0000000000000011 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8fd5c6e0 R12: ffffffff919c1cbc
R13: ffffffff919c1ca0 R14: ffffc9002c3660a8 R15: ffffffff919c1ca0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __set_page_owner+0x8d/0x4c0
 post_alloc_hook+0x1f9/0x250
 get_page_from_freelist+0x2209/0x2280
 __alloc_frozen_pages_noprof+0x217/0x5a0
 alloc_pages_mpol+0x21e/0x390
 folio_alloc_mpol_noprof+0x39/0x160
 shmem_alloc_and_add_folio+0x43e/0xf60
 shmem_get_folio_gfp+0x5da/0x16d0
 shmem_write_begin+0x16c/0x330
 generic_perform_write+0x2d5/0x8f0
 shmem_file_write_iter+0xf8/0x120
 __kernel_write_iter+0x44a/0x8f0
 dump_user_range+0xc19/0x12c0
 elf_core_dump+0x3485/0x3a90
 coredump_write+0x1290/0x1960
 vfs_coredump+0x3766/0x4530
 get_signal+0x1094/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 irqentry_exit+0x2ba/0x910
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7fbf7d99e1e1
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fbf7dc26090 RCX: 00007fbf7d99e1d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fbf7da35888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fbf7dc26128 R14: 00007fbf7dc26090 R15: 00007ffe0585dab8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g100057 f0x0 RCU_GP_WAIT_FQS(5) ->state=I
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=25962
rcu: rcu_preempt kthread starved for 10502 jiffies! g100057 f0x0 RCU_GP_WAIT_FQS(5) ->state=I ->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:I stack:27496 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17db/0x58f0
 schedule+0x164/0x2b0
 schedule_timeout+0x152/0x2c0
 rcu_gp_fqs_loop+0x30c/0x11f0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </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: 23248 Comm: syz.1.7468 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:lock_is_held_type+0x27/0x150
Code: 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 bb ff ff ff ff 83 3d 76 53 95 05 00 0f 84 e4 00 00 00 65 8b 05 a1 fd af 08 <85> c0 0f 85 d5 00 00 00 65 4c 8b 2d e1 b8 af 08 41 83 bd a4 0b 00
RSP: 0018:ffffc90000a18d40 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff88816df33c00
RDX: 8000000001000001 RSI: 00000000ffffffff RDI: ffff88823c628298
RBP: dffffc0000000000 R08: 0000000001000001 R09: 1ffffffff379aec9
R10: dffffc0000000000 R11: fffffbfff379aeca R12: 0000000000000000
R13: 0000000000000001 R14: ffff8881bee97300 R15: ffff88823c6284c0
FS:  00007fbf7e7a56c0(0000) GS:ffff8882a7cd4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e424000 CR3: 00000001a8954000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __remove_hrtimer+0x82/0x3e0
 __hrtimer_run_queues+0x295/0xa10
 hrtimer_interrupt+0x4cd/0xaa0
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:x2apic_send_IPI+0x73/0xd0
Code: 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 75 3b 41 8b 16 0f ae f0 0f ae e8 83 fb 02 b8 00 04 00 00 0f 45 c3 b9 30 08 00 00 0f 30 <66> 90 5b 41 5c 41 5e 41 5f c3 cc cc cc cc cc 48 c7 c7 60 71 bb 8f
RSP: 0018:ffffc9002bbb78f8 EFLAGS: 00000206
RAX: 00000000000000fb RBX: 00000000000000fb RCX: 0000000000000830
RDX: 0000000000000000 RSI: 00000000000000fb RDI: 0000000000000000
RBP: ffffc9002bbb79e0 R08: ffffffff917a297f R09: 1ffffffff22f452f
R10: dffffc0000000000 R11: ffffffff81756120 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888120e201d8 R15: ffffffff8e7987d0
 __smp_call_single_queue+0x1e2/0x4a0
 generic_exec_single+0x16d/0x3c0
 smp_call_function_single_async+0x7d/0x110
 rdmsrq_safe_on_cpu+0x163/0x240
 msr_read+0x13a/0x230
 vfs_read+0x213/0xa80
 ksys_read+0x150/0x270
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf7d99e1d9
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:00007fbf7e7a5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fbf7dc25fa0 RCX: 00007fbf7d99e1d9
RDX: 0000000000018ff8 RSI: 0000200000019680 RDI: 0000000000000003
RBP: 00007fbf7da35888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbf7dc26038 R14: 00007fbf7dc25fa0 R15: 00007ffe0585dab8
 </TASK>
