1024-page vmalloc region starting at 0xffffc90010c94000 allocated at kcov_ioctl+0x58/0x640 kernel/kcov.c:726
list_add corruption. next->prev should be prev (ffffffff8de28360), but was ffffffff00080000. (next=ffffc90010c94000).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:31!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 26786 Comm: vhost-26785 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__list_add_valid_or_report+0xf4/0x130 lib/list_debug.c:29
Code: 0e 61 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8 63 44 82 fd 48 8b 53 08 48 c7 c7 e0 75 a6 8b 4c 89 f6 48 89 d9 e8 7d 04 7f fc 90 <0f> 0b 4c 89 f7 e8 92 0e 61 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 33
RSP: 0018:ffffc90004167c58 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffc90010c94000 RCX: 4da93bf6adcc4500
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff92002192801 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101710491b R12: ffffc90010c94008
R13: dffffc0000000000 R14: ffffffff8de28360 R15: ffffc90016f16000
FS:  00007f0d515066c0(0000) GS:ffff888126336000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2d0976 CR3: 00000000a2532000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add include/linux/list.h:177 [inline]
 kcov_remote_area_put kernel/kcov.c:156 [inline]
 kcov_remote_stop+0x457/0x680 kernel/kcov.c:1074
 vhost_run_work_list+0x152/0x1e0 drivers/vhost/vhost.c:455
 vhost_task_fn+0x2ef/0x4a0 kernel/vhost_task.c:49
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xf4/0x130 lib/list_debug.c:29
Code: 0e 61 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8 63 44 82 fd 48 8b 53 08 48 c7 c7 e0 75 a6 8b 4c 89 f6 48 89 d9 e8 7d 04 7f fc 90 <0f> 0b 4c 89 f7 e8 92 0e 61 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 33
RSP: 0018:ffffc90004167c58 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffc90010c94000 RCX: 4da93bf6adcc4500
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff92002192801 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101710491b R12: ffffc90010c94008
R13: dffffc0000000000 R14: ffffffff8de28360 R15: ffffc90016f16000
FS:  00007f0d515066c0(0000) GS:ffff888126336000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3b5e2c CR3: 00000000a2532000 CR4: 00000000003526f0