0xf50:  [1083076] delta:1 PADDING
 0xf60:  [1083079] delta:3 hd
expected end:0xf88 last event actually ended at:0xf88
------------[ cut here ]------------
system_state != SYSTEM_BOOTING
WARNING: kernel/trace/ring_buffer.c:4784 at check_buffer.cold+0x1a2/0x1ef kernel/trace/ring_buffer.c:4784, CPU#3: syz.0.1731/12131
Modules linked in:
CPU: 3 UID: 0 PID: 12131 Comm: syz.0.1731 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:check_buffer.cold+0x1a2/0x1ef kernel/trace/ring_buffer.c:4784
Code: 03 0f b6 14 11 38 d0 7c 04 84 d2 75 5c 8b 2d 4c e3 21 10 31 ff 89 ee e8 ff 34 e8 00 85 ed 0f 84 48 cf ea 00 e8 82 3a e8 00 90 <0f> 0b 90 e9 f3 cc ea 00 49 c7 c7 20 5d f6 8b e9 51 fe ff ff e8 38
RSP: 0000:ffffc90005f17630 EFLAGS: 00010093
RAX: 0000000000000000 RBX: 1ffff92000be2ecc RCX: 0000000000000005
RDX: ffff888029470000 RSI: ffffffff8123274e RDI: ffff888029470000
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000001 R12: 00000000001086e0
R13: ffff88801d6c2000 R14: ffff888055508000 R15: ffffffff8bf658c0
FS:  0000000000000000(0000) GS:ffff888096c60000(0063) knlGS:0000000056583480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c3fafa6 CR3: 0000000074b6f000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __rb_reserve_next.constprop.0+0x486/0x1640 kernel/trace/ring_buffer.c:4874
 rb_reserve_next_event kernel/trace/ring_buffer.c:5011 [inline]
 ring_buffer_write+0x4a7/0x1910 kernel/trace/ring_buffer.c:5217
 __buffer_unlock_commit kernel/trace/trace.h:1691 [inline]
 trace_buffer_unlock_commit_regs+0x414/0x540 kernel/trace/trace.c:2049
 trace_event_buffer_commit+0x1ed/0xa80 kernel/trace/trace.c:2024
 do_trace_event_raw_event_sched_switch include/trace/events/sched.h:220 [inline]
 trace_event_raw_event_sched_switch+0x321/0x430 include/trace/events/sched.h:220
 __traceiter_sched_switch+0x6f/0xc0 include/trace/events/sched.h:220
 __do_trace_sched_switch include/trace/events/sched.h:220 [inline]
 trace_sched_switch include/trace/events/sched.h:220 [inline]
 __schedule+0x2de2/0x6920 kernel/sched/core.c:7273
 __schedule_loop kernel/sched/core.c:7353 [inline]
 schedule+0xdd/0x2c0 kernel/sched/core.c:7368
 do_nanosleep+0x113/0x500 kernel/time/hrtimer.c:2429
 hrtimer_nanosleep+0x14f/0x350 kernel/time/hrtimer.c:2475
 common_nsleep+0xa1/0xd0 kernel/time/posix-timers.c:1360
 __do_sys_clock_nanosleep_time32 kernel/time/posix-timers.c:1434 [inline]
 __se_sys_clock_nanosleep_time32 kernel/time/posix-timers.c:1411 [inline]
 __ia32_sys_clock_nanosleep_time32+0x352/0x480 kernel/time/posix-timers.c:1411
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 do_int80_emulation+0x166/0x650 arch/x86/entry/syscall_32.c:166
 asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:598
RIP: 0023:0xf71d75ab
Code: 57 56 53 8b 44 24 14 f6 00 08 75 23 8b 44 24 18 8b 5c 24 1c 8b 4c 24 20 8b 54 24 24 8b 74 24 28 8b 7c 24 2c 8b 6c 24 30 cd 80 <5b> 5e 5f 5d c3 5b 5e 5f 5d e9 f7 a1 ff ff 66 90 66 90 66 90 90 53
RSP: 002b:00000000fff61d9c EFLAGS: 00000246 ORIG_RAX: 000000000000010b
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00000000fff61e34 RSI: 00000000fff61e2c RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	57                   	push   %rdi
   1:	56                   	push   %rsi
   2:	53                   	push   %rbx
   3:	8b 44 24 14          	mov    0x14(%rsp),%eax
   7:	f6 00 08             	testb  $0x8,(%rax)
   a:	75 23                	jne    0x2f
   c:	8b 44 24 18          	mov    0x18(%rsp),%eax
  10:	8b 5c 24 1c          	mov    0x1c(%rsp),%ebx
  14:	8b 4c 24 20          	mov    0x20(%rsp),%ecx
  18:	8b 54 24 24          	mov    0x24(%rsp),%edx
  1c:	8b 74 24 28          	mov    0x28(%rsp),%esi
  20:	8b 7c 24 2c          	mov    0x2c(%rsp),%edi
  24:	8b 6c 24 30          	mov    0x30(%rsp),%ebp
  28:	cd 80                	int    $0x80
* 2a:	5b                   	pop    %rbx <-- trapping instruction
  2b:	5e                   	pop    %rsi
  2c:	5f                   	pop    %rdi
  2d:	5d                   	pop    %rbp
  2e:	c3                   	ret
  2f:	5b                   	pop    %rbx
  30:	5e                   	pop    %rsi
  31:	5f                   	pop    %rdi
  32:	5d                   	pop    %rbp
  33:	e9 f7 a1 ff ff       	jmp    0xffffa22f
  38:	66 90                	xchg   %ax,%ax
  3a:	66 90                	xchg   %ax,%ax
  3c:	66 90                	xchg   %ax,%ax
  3e:	90                   	nop
  3f:	53                   	push   %rbx