rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10502 ticks this GP) idle=b7ec/1/0x4000000000000000 softirq=26727/26729 fqs=4596
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   951775          0            0
rcu: 	cputime:    35049      17440           96   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=21341 q=2665 ncpus=2)
CPU: 1 UID: 0 PID: 8939 Comm: syz.0.935 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:handle_softirqs+0x1b0/0x870
Code: 89 64 24 30 0f b7 db 48 c7 c7 20 a7 89 8b e8 b7 d6 f4 09 65 66 c7 05 65 84 1b 11 00 00 e8 08 6a 42 00 fb 49 c7 c7 c0 c0 e0 8d <b8> ff ff ff ff 0f bc c3 41 89 c5 41 ff c5 0f 84 c2 03 00 00 89 5c
RSP: 0018:ffffc900001e0e40 EFLAGS: 00000286
RAX: bdb30c49c4341600 RBX: 0000000000000282 RCX: bdb30c49c4341600
RDX: 0000000000000000 RSI: ffffffff8d9b7306 RDI: ffffffff8be33700
RBP: ffffc900001e0f50 R08: ffffffff8fa38937 R09: 1ffffffff1f47126
R10: dffffc0000000000 R11: fffffbfff1f47127 R12: 000000000000000a
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8de0c0c0
FS:  00007f297b9036c0(0000) GS:ffff8881a3c19000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32263fff CR3: 000000011175c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __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:kmem_cache_alloc_noprof+0x31/0x3c0
Code: 41 56 41 55 41 54 53 48 83 ec 20 89 f5 49 89 fe 65 48 8b 05 a1 e3 87 10 48 89 44 24 18 48 8b 44 24 50 48 89 44 24 08 8b 47 1c <48> 89 04 24 8b 1d 15 04 8b 0d 21 f3 89 df e8 ec a7 fd ff 89 df e8
RSP: 0018:ffffc90004f17c38 EFLAGS: 00000282
RAX: 0000000000000800 RBX: ffff88801e2ac8c0 RCX: ffff8880311e3980
RDX: 0000000000000000 RSI: 0000000000000cc0 RDI: ffff88801e2ac8c0
RBP: 0000000000000cc0 R08: 0000000000000000 R09: 1ffffffff33feb8c
R10: dffffc0000000000 R11: fffffbfff33feb8d R12: 0000000000000001
R13: dffffc0000000000 R14: ffff88801e2ac8c0 R15: ffffffff8f63c4c0
 sk_prot_alloc+0x57/0x220
 sk_alloc+0x3a/0x370
 unix_create1+0xb0/0x7c0
 unix_create+0x16b/0x210
 __sock_create+0x4b3/0x9f0
 __sys_socketpair+0x1c5/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f297a98eba9
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:00007f297b903038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f297abd5fa0 RCX: 00007f297a98eba9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f297aa11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f297abd6038 R14: 00007f297abd5fa0 R15: 00007ffe950bab38
 </TASK>
