rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=5154/1/0x4000000000000000 softirq=28492/28496 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8551/1:b..l
rcu: 	(detected by 0, t=10505 jiffies, g=23009, q=257 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8550 Comm: syz.3.721 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:check_preemption_disabled+0x35/0x120
Code: 48 8b 05 be 2e 26 07 48 89 44 24 08 65 8b 05 c6 2e 26 07 65 8b 0d bb 2e 26 07 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d 9b 2e 26 07 <48> 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d e9
RSP: 0018:ffffc900001e07a8 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: c63a3f0d2531a100
RDX: 0000000000000000 RSI: ffffffff8d9cdca9 RDI: ffffffff8be33e00
RBP: ffffffff81ada78b R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1026cc4f51 R12: 0000000000000000
R13: ffff888136627a98 R14: 0000000000000001 R15: 0000000000000046
FS:  00007f8f759f66c0(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000106a4e000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0xe7/0x360
 _raw_spin_lock_irqsave+0xa7/0xf0
 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:__memcg_slab_post_alloc_hook+0x27e/0x7f0
Code: a0 40 92 0b 4c 89 ff e8 d0 31 49 ff 49 89 c7 49 c1 ef 06 49 83 e7 c0 4f 8d 24 3e 49 83 c4 08 4c 89 e0 48 c1 e8 03 80 3c 28 00 <74> 08 4c 89 e7 e8 08 e7 f7 ff 49 8b 04 24 a8 01 0f 85 f5 02 00 00
RSP: 0018:ffffc90007807c78 EFLAGS: 00000246
RAX: 1ffffd400082e999 RBX: ffffc90007807d50 RCX: 0000000000080000
RDX: ffffc90003781000 RSI: 0000000000000094 RDI: 0000000000000095
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff822c00c9
R10: 0000000000000406 R11: 0000000000000002 R12: ffffea0004174cc8
R13: 0000000000000000 R14: ffffea0000000000 R15: 0000000004174cc0
 kmem_cache_alloc_lru_noprof+0x2c7/0x3d0
 sock_alloc_inode+0x28/0xc0
 alloc_inode+0x6a/0x1b0
 __sock_create+0x12d/0x9f0
 __sys_socketpair+0x1c5/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8f7778eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8f759f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f8f779d5fa0 RCX: 00007f8f7778eba9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f8f77811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000580 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8f779d6038 R14: 00007f8f779d5fa0 R15: 00007ffdeacc87c8
 </TASK>
task:syz.1.722       state:R  running task     stack:26920 pid:8551  tgid:8551  ppid:5877   task_flags:0x400040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_release+0x2b5/0x3e0
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 0b 2d 03 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0000:ffffc90007bb7928 EFLAGS: 00000206
RAX: 4d12212ff4237700 RBX: 0000000000000202 RCX: 4d12212ff4237700
RDX: 0000000000000001 RSI: ffffffff8dba9826 RDI: ffffffff8be33e00
RBP: ffff88803556e158 R08: 0000000000000000 R09: ffffffff822bfde9
R10: dffffc0000000000 R11: fffff940001e96f9 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff8e13a120 R15: ffff88803556d640
 percpu_ref_get_many+0xf9/0x140
 charge_memcg+0xcb/0x180
 __mem_cgroup_charge+0x25/0x80
 folio_prealloc+0x51/0x180
 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: 0033:0x7f819ca4da2c
RSP: 002b:00007ffee9e504a8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007f819d905720 RCX: ffffffff8223d5c3
RDX: 00000000000015c3 RSI: ffffffff8223d5c3 RDI: 0000000000000015
RBP: ffffffff8223d5c3 R08: 00007f819cdc0000 R09: 00007f819cdc2000
R10: 000000008223d5c7 R11: 0000000000000015 R12: 0000000000000015
R13: 0000000000000000 R14: ffffffff8223d5c3 R15: 0000000000000018
 </TASK>
rcu: rcu_preempt kthread starved for 10505 jiffies! g23009 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: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:
CPU: 0 UID: 0 PID: 8545 Comm: syz.2.720 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:smp_call_function_many_cond+0xd33/0x12d0
Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 56 63 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 01 5f 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 e5 5e
RSP: 0018:ffffc90007a37480 EFLAGS: 00000293
RAX: ffffffff81b4621b RBX: 1ffff11026cc7f61 RCX: ffff88803463d640
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90007a37600 R08: ffff8880272b5547 R09: 1ffff11004e56aa8
R10: dffffc0000000000 R11: ffffed1004e56aa9 R12: ffff88813663fb08
R13: dffffc0000000000 R14: ffff88804b03b1c0 R15: 0000000000000001
FS:  00007fd8350856c0(0000) GS:ffff8880b8615000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f819cdcce18 CR3: 000000002945e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 flush_tlb_mm_range+0x6b1/0x12d0
 tlb_flush_mmu+0x1a7/0x680
 tlb_finish_mmu+0xc3/0x1d0
 exit_mmap+0x44c/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: 0033:0x7fd83418eba9
Code: Unable to access opcode bytes at 0x7fd83418eb7f.
RSP: 002b:00007fd8350850e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fd8343d5fa8 RCX: 00007fd83418eba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd8343d5fa8
RBP: 00007fd8343d5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd8343d6038 R14: 00007ffcebe84f40 R15: 00007ffcebe85028
 </TASK>
