------------[ cut here ]------------
Reader on commit with 1020 missed events
WARNING: kernel/trace/ring_buffer.c:8033 at ring_buffer_map_get_reader+0x722/0x990 kernel/trace/ring_buffer.c:8031, CPU#1: syz.7.1338/13976
Modules linked in:
CPU: 1 UID: 0 PID: 13976 Comm: syz.7.1338 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ring_buffer_map_get_reader+0x72a/0x990 kernel/trace/ring_buffer.c:8031
Code: ff 4c 8b 74 24 58 48 8b 5c 24 28 4d 89 e5 4d 89 fc e9 eb fb ff ff e8 35 37 fc ff 48 8d 3d be 47 eb 0e 48 8b b4 24 e0 00 00 00 <67> 48 0f b9 3a e9 1e ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c
RSP: 0018:ffffc900057f7d20 EFLAGS: 00010002
RAX: ffffffff81caa3ab RBX: 00000000000003fc RCX: ffff8880307e8000
RDX: 0000000000000003 RSI: 00000000000003fc RDI: ffffffff90b5eb70
RBP: ffffc900057f7e78 R08: 000000000000044d R09: 0000000000400000
R10: 00000000000089a8 R11: ffffed1027fec4b3 R12: ffff88813ff62580
R13: dffffc0000000000 R14: ffff88813ff720e8 R15: ffff88813ff62580
FS:  00007f6d92c566c0(0000) GS:ffff888124ab9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f04cfeb4368 CR3: 000000006c588000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 tracing_buffers_ioctl+0x25e/0x310 kernel/trace/trace.c:7397
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6d949fe559
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:00007f6d92c56028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6d94c85fa0 RCX: 00007f6d949fe559
RDX: 0000000000000000 RSI: 0000000000005220 RDI: 0000000000000004
RBP: 00007f6d94a95ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6d94c86038 R14: 00007f6d94c85fa0 R15: 00007ffcfc762ba8
 </TASK>
----------------
Code disassembly (best guess):
   0:	ff 4c 8b 74          	decl   0x74(%rbx,%rcx,4)
   4:	24 58                	and    $0x58,%al
   6:	48 8b 5c 24 28       	mov    0x28(%rsp),%rbx
   b:	4d 89 e5             	mov    %r12,%r13
   e:	4d 89 fc             	mov    %r15,%r12
  11:	e9 eb fb ff ff       	jmp    0xfffffc01
  16:	e8 35 37 fc ff       	call   0xfffc3750
  1b:	48 8d 3d be 47 eb 0e 	lea    0xeeb47be(%rip),%rdi        # 0xeeb47e0
  22:	48 8b b4 24 e0 00 00 	mov    0xe0(%rsp),%rsi
  29:	00
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 1e ff ff ff       	jmp    0xffffff52
  34:	89 d9                	mov    %ebx,%ecx
  36:	80 e1 07             	and    $0x7,%cl
  39:	80 c1 03             	add    $0x3,%cl
  3c:	38 c1                	cmp    %al,%cl
  3e:	0f                   	.byte 0xf
  3f:	8c                   	.byte 0x8c