rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=a134/1/0x4000000000000000 softirq=63280/63281 fqs=4933
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1232118          0            0
rcu: 	cputime:    33647      18839           37   ==> 52490(ms)
rcu: 	(t=10501 jiffies g=63317 q=4337 ncpus=2)
CPU: 1 UID: 0 PID: 16090 Comm: syz.3.2844 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:kasan_save_track+0x60/0x80
Code: 00 31 d2 e8 22 53 83 ff 4c 89 ff 89 c6 89 da b9 01 00 00 00 e8 41 2d b1 02 65 48 8b 0d f1 ab cb 10 8b 89 f8 05 00 00 41 89 0e <41> 89 46 04 48 8d 65 e8 5b 41 5e 41 5f 5d c3 cc cc cc cc cc 66 66
RSP: 0018:ffffc90000a08960 EFLAGS: 00000286
RAX: 0000000005aa02e9 RBX: 0000000000000000 RCX: 0000000000003eda
RDX: 00000000506a9c9b RSI: 0000000000000001 RDI: 00000000cd3efdbe
RBP: ffffc90000a08b88 R08: 000000005c4fa292 R09: 0000000066a27a71
R10: 000000000000000d R11: ffffffff81af6830 R12: ffff8881bafc9800
R13: 0000000000000000 R14: ffff8881bafc9808 R15: ffffc90000a08960
FS:  00007f273b9e66c0(0000) GS:ffff8882a96a4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c35f750 CR3: 0000000174348000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x187/0x630
 neigh_timer_handler+0xb72/0x11e0
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0x48/0xa0
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 93 90 03 f6 e8 ae 23 3c f6 fb bf 01 00 00 00 <e8> 23 a9 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 84 25 3c f6 bf 01
RSP: 0018:ffffc90004cc7010 EFLAGS: 00000206
RAX: 00000000000050c9 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000006 RSI: ffffffff8dcf1f4e RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8ff0e0b7 R09: 1ffffffff1fe1c16
R10: dffffc0000000000 R11: fffffbfff1fe1c17 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x4a5/0x23c0
Code: e0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 66 18 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 79 18 00 00 41 0f b6 44 24 01 <83> e0 07 0f 84 66 15 00 00 83 f8 01 4c 8b 7c 24 50 48 bd 00 00 00
RSP: 0018:ffffc90004cc7138 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffffff906280e0 RCX: ffffffff906280e4
RDX: ffffffff910c225e RSI: ffffffff910c2234 RDI: ffffffff8c076ca0
RBP: dffffc0000000000 R08: 0000000000000008 R09: ffffffff8e560120
R10: ffffc90004cc7258 R11: ffffffff81af6830 R12: ffffffff910c2262
R13: ffffffff910c2263 R14: ffffc90004cc7208 R15: ffffffff906280e0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x31c/0x660
 sctp_association_new+0x89/0x25e0
 sctp_connect_new_asoc+0x2e4/0x6b0
 sctp_sendmsg+0x1577/0x2920
 sock_sendmsg_nosec+0x128/0x1d0
 ____sys_sendmsg+0x589/0x8c0
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1bd/0x2a0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f273ab9acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f273b9e6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f273ae15fa0 RCX: 00007f273ab9acb9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f273ac08bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f273ae16038 R14: 00007f273ae15fa0 R15: 00007fffda1fbe08
 </TASK>
sched: DL replenish lagged too much
