list_add corruption. next->prev should be prev (ffff888021195048), but was ffff88807a6ed048. (next=ffff88814a7965e8).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:31!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5198 Comm: syz-executor231 Not tainted 6.6.0-syzkaller-10396-g4652b8e4f3ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:__list_add_valid_or_report+0xce/0xf0 lib/list_debug.c:29
Code: 5d 9d 8b e8 64 d1 87 06 0f 0b 48 c7 c7 40 5e 9d 8b e8 56 d1 87 06 0f 0b 48 c7 c7 a0 5e 9d 8b 4c 89 e6 4c 89 f1 e8 42 d1 87 06 <0f> 0b 48 c7 c7 20 5f 9d 8b 4c 89 f6 4c 89 e1 e8 2e d1 87 06 0f 0b
RSP: 0018:ffffc90003c77650 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffff88814a7965f0 RCX: 319ab293341e1500
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90003c77778 R08: ffffffff81717e2c R09: 1ffff9200078ee68
R10: dffffc0000000000 R11: fffff5200078ee69 R12: ffff888021195048
R13: dffffc0000000000 R14: ffff88814a7965e8 R15: ffff88801d711048
FS:  00007fc73b6496c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000008 CR3: 00000000735d1000 CR4: 00000000003506f0
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+0x1af/0x430 drivers/ptp/ptp_chardev.c:122
 posix_clock_open+0x155/0x1f0 kernel/time/posix-clock.c:134
 chrdev_open+0x5ab/0x630 fs/char_dev.c:414
 do_dentry_open+0x8fd/0x1590 fs/open.c:948
 do_open fs/namei.c:3622 [inline]
 path_openat+0x2845/0x3280 fs/namei.c:3779
 do_filp_open+0x234/0x490 fs/namei.c:3809
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1440
 do_sys_open fs/open.c:1455 [inline]
 __do_sys_openat fs/open.c:1471 [inline]
 __se_sys_openat fs/open.c:1466 [inline]
 __x64_sys_openat+0x247/0x290 fs/open.c:1466
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fc73b6882a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc73b649238 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc73b712308 RCX: 00007fc73b6882a9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007fc73b712300 R08: 00007ffd566ead47 R09: 00007fc73b6496c0
R10: 0000000000000000 R11: 0000000000000246 R12: 7074702f7665642f
R13: 0000000000000000 R14: 00007ffd566eac60 R15: 00007ffd566ead48
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xce/0xf0 lib/list_debug.c:29
Code: 5d 9d 8b e8 64 d1 87 06 0f 0b 48 c7 c7 40 5e 9d 8b e8 56 d1 87 06 0f 0b 48 c7 c7 a0 5e 9d 8b 4c 89 e6 4c 89 f1 e8 42 d1 87 06 <0f> 0b 48 c7 c7 20 5f 9d 8b 4c 89 f6 4c 89 e1 e8 2e d1 87 06 0f 0b
RSP: 0018:ffffc90003c77650 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffff88814a7965f0 RCX: 319ab293341e1500
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90003c77778 R08: ffffffff81717e2c R09: 1ffff9200078ee68
R10: dffffc0000000000 R11: fffff5200078ee69 R12: ffff888021195048
R13: dffffc0000000000 R14: ffff88814a7965e8 R15: ffff88801d711048
FS:  00007fc73b6496c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000008 CR3: 00000000735d1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400