rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=3fe4/1/0x4000000000000000 softirq=26438/26438 fqs=0
rcu: 	(detected by 1, t=10505 jiffies, g=15329, q=1392 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7210 Comm: syz.0.327 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:hrtimer_try_to_cancel+0x31/0x420
Code: 41 56 41 55 41 54 53 48 83 ec 30 48 89 fb 49 be 00 00 00 00 00 fc ff df e8 7c 1b 12 00 48 8d 4b 38 48 89 5c 24 18 48 83 c3 30 <48> 89 d8 48 c1 e8 03 48 89 44 24 10 48 89 0c 24 48 c1 e9 03 48 89
RSP: 0018:ffffc90000007928 EFLAGS: 00000086
RAX: ffffffff81ada584 RBX: ffff8880298eebd8 RCX: ffff8880298eebe0
RDX: 0000000000010000 RSI: 0000000000000004 RDI: ffff8880298eeba8
RBP: 00000000ffffffff R08: ffff88804b027a83 R09: 1ffff11009604f50
R10: dffffc0000000000 R11: ffffed1009604f51 R12: ffff8880298eec50
R13: dffffc0000000000 R14: dffffc0000000000 R15: fffffffffffe84a0
FS:  00007f247a7f66c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000015c0 CR3: 0000000024b00000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 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:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 ab 7a 14 f6 e8 16 d7 4b f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90007d46c20 EFLAGS: 00000282
RAX: a02ec87c70486700 RBX: 0000000000000000 RCX: a02ec87c70486700
RDX: 0000000000000006 RSI: ffffffff8d9ba7f1 RDI: 0000000000000001
RBP: ffffc90007d46cc0 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000fa8d84
 irqentry_exit+0x6f/0x90
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:__asan_memset+0x15/0x50
Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 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
RSP: 0018:ffffc90007d46d80 EFLAGS: 00000246
RAX: ffffc90007d46ed0 RBX: 0000000000000040 RCX: ffffffff8a16c3e8
RDX: 0000000000000040 RSI: 0000000000000000 RDI: ffffc90007d46f70
RBP: 0000000000000000 R08: ffffc90007d46f4f R09: 0000000000000000
R10: ffffc90007d46ed0 R11: fffff52000fa8dea R12: 0000000000000000
R13: dffffc0000000000 R14: ffffc90007d46f70 R15: ffff888109060000
 inet_diag_dump_icsk+0x7f8/0x1f40
 inet_diag_dump_compat+0x257/0x460
 netlink_dump+0x6e4/0xe90
 __netlink_dump_start+0x5cb/0x7e0
 inet_diag_rcv_msg_compat+0x1ea/0x3b0
 sock_diag_rcv_msg+0x4cc/0x600
 netlink_rcv_skb+0x208/0x470
 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: 0033:0x7f247998eba9
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:00007f247a7f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2479bd5fa0 RCX: 00007f247998eba9
RDX: 0000000000044010 RSI: 0000200000000180 RDI: 0000000000000005
RBP: 00007f2479a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2479bd6038 R14: 00007f2479bd5fa0 R15: 00007ffed8a77d28
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g15329 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=6627
rcu: rcu_preempt kthread starved for 10505 jiffies! g15329 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:27432 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>
