list_add corruption. prev->next should be next (ffff88801789a5e8), but was ffff888063779048. (prev=ffff8880636cd048).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:32!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 32250 Comm: syz-executor.1 Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__list_add_valid_or_report+0xb6/0x100 lib/list_debug.c:32
Code: e8 6f ad 03 fd 0f 0b 48 89 d9 48 c7 c7 c0 81 2e 8b e8 5e ad 03 fd 0f 0b 48 89 f1 48 c7 c7 40 82 2e 8b 48 89 de e8 4a ad 03 fd <0f> 0b 48 89 f2 48 89 d9 48 89 ee 48 c7 c7 c0 82 2e 8b e8 33 ad 03
RSP: 0018:ffffc900283ef878 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff88801789a5e8 RCX: ffffffff816b8ea9
RDX: 0000000000000000 RSI: ffffffff816c2332 RDI: 0000000000000005
RBP: ffff888062929048 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 6464615f7473696c R12: ffff88801789a000
R13: ffffc900283ef8e0 R14: ffff8880636cd048 R15: ffff888062929048
FS:  0000000000000000(0000) GS:ffff88802c600000(0063) knlGS:00000000f7f33b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000005813a04c CR3: 00000000630fa000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:88 [inline]
 __list_add include/linux/list.h:150 [inline]
 list_add_tail include/linux/list.h:183 [inline]
 ptp_open+0x1c5/0x4f0 drivers/ptp/ptp_chardev.c:122
 posix_clock_open+0x17e/0x240 kernel/time/posix-clock.c:134
 chrdev_open+0x26d/0x6e0 fs/char_dev.c:414
 do_dentry_open+0x8d4/0x18d0 fs/open.c:948
 do_open fs/namei.c:3622 [inline]
 path_openat+0x1d4e/0x2c40 fs/namei.c:3779
 do_filp_open+0x1de/0x430 fs/namei.c:3809
 do_sys_openat2+0x176/0x1e0 fs/open.c:1440
 do_sys_open fs/open.c:1455 [inline]
 __do_compat_sys_openat fs/open.c:1515 [inline]
 __se_compat_sys_openat fs/open.c:1513 [inline]
 __ia32_compat_sys_openat+0x16e/0x200 fs/open.c:1513
 do_syscall_32_irqs_on arch/x86/entry/common.c:164 [inline]
 __do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:230
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:255
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a
RIP: 0023:0xf7f59579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7f335ac EFLAGS: 00000292 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000000
RDX: 0000000000008000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xb6/0x100 lib/list_debug.c:32
Code: e8 6f ad 03 fd 0f 0b 48 89 d9 48 c7 c7 c0 81 2e 8b e8 5e ad 03 fd 0f 0b 48 89 f1 48 c7 c7 40 82 2e 8b 48 89 de e8 4a ad 03 fd <0f> 0b 48 89 f2 48 89 d9 48 89 ee 48 c7 c7 c0 82 2e 8b e8 33 ad 03
RSP: 0018:ffffc900283ef878 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff88801789a5e8 RCX: ffffffff816b8ea9
RDX: 0000000000000000 RSI: ffffffff816c2332 RDI: 0000000000000005
RBP: ffff888062929048 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 6464615f7473696c R12: ffff88801789a000
R13: ffffc900283ef8e0 R14: ffff8880636cd048 R15: ffff888062929048
FS:  0000000000000000(0000) GS:ffff88802c600000(0063) knlGS:00000000f7f33b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000005813a04c CR3: 00000000630fa000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi