rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6195/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=9053, q=435 ncpus=2)
task:syz.0.76        state:R  running task     stack:24024 pid:6195  tgid:6192  ppid:5849   task_flags:0x40054c flags:0x00004002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:rcu_is_watching+0x67/0xb0
Code: 89 f7 e8 bc cc 7c 00 48 c7 c3 98 ff a1 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d d9 5d fa 10 <74> 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f c3 cc cc cc cc cc e8 e1 54
RSP: 0018:ffffc900045376c0 EFLAGS: 00000286
RAX: 000000000002a564 RBX: ffff888136632f98 RCX: c72735b0eb875e00
RDX: 0000000000000000 RSI: ffffffff8be33de0 RDI: ffffffff8be33da0
RBP: ffff88802648f180 R08: 0000000000000000 R09: ffffffff822bf4a9
R10: dffffc0000000000 R11: ffffed10036dd131 R12: ffffffff99b30c00
R13: ffff888020bbde00 R14: ffffffff8dbe2d18 R15: dffffc0000000000
 percpu_ref_put+0x47/0x180
 __memcg_slab_free_hook+0x12f/0x3d0
 kmem_cache_free+0x223/0x400
 exit_mmap+0x53f/0xb50
 __mmput+0x118/0x430
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbef018eba9
RSP: 002b:00007fbef1034fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: fffffffffffffffc RBX: 00007fbef03d6090 RCX: 00007fbef018eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000041980000
RBP: 00007fbef0211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fbef03d6128 R14: 00007fbef03d6090 R15: 00007ffc33057038
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g9053 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=2694
rcu: rcu_preempt kthread starved for 10502 jiffies! g9053 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:27160 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 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: 6206 Comm: syz.1.78 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:_raw_spin_lock_irqsave+0x8/0xf0
Code: 48 83 c4 08 48 89 df 5b e9 55 28 21 f6 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 <41> 57 41 56 41 54 53 48 83 e4 e0 48 83 ec 60 48 89 fb 65 48 8b 05
RSP: 0000:ffffc900001e0918 EFLAGS: 00000046
RAX: 1ffff11003959a5b RBX: 1ffff11026cc4f60 RCX: ffff888020a13980
RDX: 0000000000010000 RSI: 0000000000000000 RDI: ffff888136627a80
RBP: ffffc900001e0918 R08: ffff888136627a83 R09: 1ffff11026cc4f50
R10: dffffc0000000000 R11: ffffed1026cc4f51 R12: ffff88801cacd2d8
R13: ffff888136627b00 R14: dffffc0000000000 R15: ffff888136627b00
FS:  00007f4c6ecad6c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c6ecad0e8 CR3: 00000000288c6000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__asan_memset+0x22/0x50
Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 56 53 48 89 d3 89 f5 49 89 fe 48 8b 4c 24 18 48 89 d6 ba 01 00 00 00 e8 7e e4 ff ff <84> c0 74 11 4c 89 f7 89 ee 48 89 da 5b 41 5e 5d e9 79 3a 57 09 31
RSP: 0000:ffffc900045af0f8 EFLAGS: 00000256
RAX: 1ffff920008b5e01 RBX: 0000000000000010 RCX: ffffffff8172dd88
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900045af238
RBP: 0000000000000000 R08: ffffc900045af247 R09: 1ffff920008b5e48
R10: dffffc0000000000 R11: fffff520008b5e49 R12: ffffc900045aff58
R13: ffffc900045af238 R14: ffffc900045af238 R15: ffffc900045af230
 unwind_next_frame+0xc98/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __set_page_owner+0x8d/0x4a0
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 vma_alloc_folio_noprof+0xe4/0x200
 folio_prealloc+0x30/0x180
 do_wp_page+0x1231/0x5800
 __handle_mm_fault+0x1033/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f4c6dc5ed3b
Code: 00 74 24 80 3d b8 69 ea 00 00 0f b6 35 ae 69 ea 00 75 4c 80 3d a9 69 ea 00 00 75 43 40 84 f6 75 3e 66 0f 1f 44 00 00 48 89 ef <e8> 90 fa ff ff 8b 45 0c 85 c0 75 35 48 8d 75 0c b9 40 42 0f 00 ba
RSP: 002b:00007f4c6ecad0f0 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 00007f4c6dfd5fa8 RCX: 00007f4c6dd8eba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4c6dfd5fa0
RBP: 00007f4c6dfd5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4c6dfd6038 R14: 00007ffce8fdb0d0 R15: 00007ffce8fdb1b8
 </TASK>
