rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=8be4/1/0x4000000000000000 softirq=35432/35453 fqs=746
rcu: 	(t=10500 jiffies g=22333 q=1664 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 8995 jiffies! g22333 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=8131
rcu: rcu_preempt kthread starved for 8996 jiffies! g22333 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26792 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5843 Comm: syz-executor 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:native_queued_spin_lock_slowpath+0xb7/0x8e0
Code: 00 00 00 0f 1f 44 00 00 4c 8d 74 24 60 49 89 df 49 c1 ef 03 41 bd 01 00 00 00 eb 06 89 44 24 60 f3 90 48 89 df be 04 00 00 00 <e8> 94 91 ad f6 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 84 c0
RSP: 0018:ffffc900000078c0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880296718c0 RCX: ffffffff8b759e5c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880296718c0
RBP: ffffc900000079b8 R08: ffff8880296718c3 R09: 1ffff110052ce318
R10: dffffc0000000000 R11: ffffed10052ce319 R12: 1ffff92000000f20
R13: 0000000000000001 R14: ffffc90000007920 R15: 1ffff110052ce318
FS:  0000000000000000(0000) GS:ffff8880b863d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f03be851ff8 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 __xfrm_state_delete+0xba/0xca0
 xfrm_timer_handler+0x18f/0xa00
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70
Code: 8b 3d 64 c7 fd 0b 48 89 de 5b e9 73 ae 58 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 08 30 9e 92 65 8b 15 88 82 de 10 81 e2 00 01 ff 00
RSP: 0018:ffffc9000353f398 EFLAGS: 00000246
RAX: ffffffff8209637e RBX: 0000000000000000 RCX: ffff888020625640
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000353f650 R08: ffffc9000353f327 R09: 1ffff920006a7e64
R10: dffffc0000000000 R11: fffff520006a7e65 R12: dffffc0000000000
R13: 00007f2253836000 R14: 8000000116950000 R15: 8000000116950027
 unmap_page_range+0x1dde/0x4370
 unmap_vmas+0x399/0x580
 exit_mmap+0x248/0xb50
 __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: 0033:0x7f2254b84e53
Code: Unable to access opcode bytes at 0x7f2254b84e29.
RSP: 002b:00007ffd30f635c8 EFLAGS: 00000202 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 00000000000016d9 RCX: 00007f2254b84e53
RDX: 0000000040000000 RSI: 00007ffd30f635dc RDI: 00000000ffffffff
RBP: 00007ffd30f635dc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
CPU: 1 UID: 0 PID: 9821 Comm: syz.1.1048 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:__sanitizer_cov_trace_pc+0x46/0x70
Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2
RSP: 0018:ffffc90007c670d8 EFLAGS: 00000246
RAX: ffffffff8a2390c4 RBX: 0000000008000000 RCX: ffff888107283980
RDX: ffffc90003952000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90007c67230 R08: 0000000000000000 R09: ffffffff8a238e30
R10: dffffc0000000000 R11: fffff52000f8ce0c R12: dffffc0000000000
R13: ffff8880277bf180 R14: 0000000000000000 R15: ffffc90007c676a0
FS:  00007f2255adc6c0(0000) GS:ffff8881a3c3d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c26004a CR3: 000000003a8c2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xfrm_alloc_spi+0x534/0xf30
 xfrm_alloc_userspi+0x70b/0xc90
 xfrm_user_rcv_msg+0x7a3/0xab0
 netlink_rcv_skb+0x208/0x470
 xfrm_netlink_rcv+0x79/0x90
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2254b8ec29
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:00007f2255adc038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2254dd5fa0 RCX: 00007f2254b8ec29
RDX: 0000000000000000 RSI: 0000200000000540 RDI: 0000000000000003
RBP: 00007f2254c11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2254dd6038 R14: 00007f2254dd5fa0 R15: 00007ffd30f63078
 </TASK>
