clocksource: Long readout interval, skipping watchdog check: cs_nsec: 62790850316 wd_nsec: 62790840223
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=0c5c/1/0x4000000000000000 softirq=80939/80942 fqs=5232
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1203311         11            0
rcu: 	cputime:    35187      17302           38   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=64037 q=4031 ncpus=2)
CPU: 1 UID: 0 PID: 16023 Comm: syz.3.3999 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:unwind_next_frame+0x513/0x23c0
Code: c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49
RSP: 0018:ffffc90000a088b8 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff902402a4 RCX: dffffc0000000000
RDX: ffffffff90240220 RSI: ffffffff909d1d4a RDI: ffffffff8c27c9a0
RBP: ffffffff90240220 R08: 0000000000000022 R09: ffffffff8e75e5e0
R10: dffffc0000000000 R11: ffffffff81b0c390 R12: ffffffff8100012f
R13: ffffffff90240220 R14: ffffc90000a08988 R15: ffffffff90240260
FS:  00007f32b9ea46c0(0000) GS:ffff8882a945a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc2d8fd8440 CR3: 00000001663c0000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1c1/0x630
 slab_free_after_rcu_debug+0x5e/0x220
 rcu_core+0x7cd/0x1070
 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:finish_task_switch+0x245/0x920
Code: 00 00 48 85 db 0f 85 e8 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 49 83 c4 48 4c 89 e7 e8 d5 65 1c 0a e8 30 81 38 00 fb 4c 8b 65 c0 <49> 8d bc 24 80 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90006b2f898 EFLAGS: 00000206
RAX: 00000000000015e1 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8def8e53 RDI: ffffffff8c27ca00
RBP: ffffc90006b2f8f0 R08: ffffffff9011b4b7 R09: 1ffffffff2023696
R10: dffffc0000000000 R11: fffffbfff2023697 R12: ffff888168bf3a80
R13: dffffc0000000000 R14: ffff8881af463a80 R15: ffff88823c63b998
 __schedule+0x15e5/0x52d0
 preempt_schedule_common+0x82/0xd0
 preempt_schedule_thunk+0x16/0x30
 __local_bh_enable_ip+0xe1/0x130
 sctp_close+0x7b1/0x940
 inet_release+0x143/0x190
 sock_close+0xc3/0x240
 __fput+0x44f/0xa70
 fput_close_sync+0x11f/0x240
 __x64_sys_close+0x7e/0x110
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f32b8f9c799
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:00007f32b9ea4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f32b9215fa0 RCX: 00007f32b8f9c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
RBP: 00007f32b9032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f32b9216038 R14: 00007f32b9215fa0 R15: 00007ffec8bb9a98
 </TASK>
sched: DL replenish lagged too much
