start ffff88802ba28000
 pointer offset 1480
 size 8192
list_del corruption. prev->next should be ffffc9001cbcf978, but was ffff888055b5b670. (prev=ffff88802ba285c8)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:64!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 7172 Comm: syz.3.377 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 9b c0 54 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 cc b1 77 fd 49 8b 17 48 c7 c7 c0 a9 27 8c 48 89 de 4c 89 f9 e8 17 d8 6f fc 90 <0f> 0b 4c 89 f7 e8 6c c0 54 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 9d
RSP: 0018:ffffc9001cbcf750 EFLAGS: 00010046
RAX: 000000000000006d RBX: ffffc9001cbcf978 RCX: 82514ffb58fdf200
RDX: ffffc9000d843000 RSI: 0000000000077ac3 RDI: 0000000000077ac4
RBP: dffffc0000000000 R08: ffffffff8e752663 R09: 1ffffffff1cea4cc
R10: dffffc0000000000 R11: fffffbfff1cea4cd R12: 1ffff110057450b9
R13: dffffc0000000000 R14: ffff88802ba285c8 R15: ffff88802ba285c8
FS:  0000000000000000(0000) GS:ffff888125466000(0063) knlGS:00000000f5446b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f74012f0 CR3: 0000000021bda000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:132 [inline]
 __list_del_entry include/linux/list.h:223 [inline]
 list_del include/linux/list.h:237 [inline]
 __remove_wait_queue include/linux/wait.h:209 [inline]
 remove_wait_queue+0x33/0x120 kernel/sched/wait.c:74
 free_poll_entry fs/select.c:132 [inline]
 poll_freewait+0xb1/0x240 fs/select.c:141
 do_sys_poll+0xe60/0x1120 fs/select.c:1006
 __do_compat_sys_ppoll_time32 fs/select.c:1405 [inline]
 __se_compat_sys_ppoll_time32 fs/select.c:1385 [inline]
 __ia32_compat_sys_ppoll_time32+0x2aa/0x320 fs/select.c:1385
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f84f6c
Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 58 b8 77 00 00 00 cd 80 0f 0b 90 90 90 90 90 90 b8 ad
RSP: 002b:00000000f544650c EFLAGS: 00000206 ORIG_RAX: 0000000000000135
RAX: ffffffffffffffda RBX: 0000000080000040 RCX: 0000000000000001
RDX: 00000000800000c0 RSI: 0000000080000100 RDI: 0000000000000008
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 9b c0 54 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 cc b1 77 fd 49 8b 17 48 c7 c7 c0 a9 27 8c 48 89 de 4c 89 f9 e8 17 d8 6f fc 90 <0f> 0b 4c 89 f7 e8 6c c0 54 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 9d
RSP: 0018:ffffc9001cbcf750 EFLAGS: 00010046
RAX: 000000000000006d RBX: ffffc9001cbcf978 RCX: 82514ffb58fdf200
RDX: ffffc9000d843000 RSI: 0000000000077ac3 RDI: 0000000000077ac4
RBP: dffffc0000000000 R08: ffffffff8e752663 R09: 1ffffffff1cea4cc
R10: dffffc0000000000 R11: fffffbfff1cea4cd R12: 1ffff110057450b9
R13: dffffc0000000000 R14: ffff88802ba285c8 R15: ffff88802ba285c8
FS:  0000000000000000(0000) GS:ffff888125466000(0063) knlGS:00000000f5446b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f74012f0 CR3: 0000000021bda000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	85 d2                	test   %edx,%edx
   3:	74 0a                	je     0xf
   5:	89 ce                	mov    %ecx,%esi
   7:	81 e6 ff 0f 00 00    	and    $0xfff,%esi
   d:	89 32                	mov    %esi,(%rdx)
   f:	85 c0                	test   %eax,%eax
  11:	74 05                	je     0x18
  13:	c1 e9 0c             	shr    $0xc,%ecx
  16:	89 08                	mov    %ecx,(%rax)
  18:	31 c0                	xor    %eax,%eax
  1a:	5e                   	pop    %rsi
  1b:	5d                   	pop    %rbp
  1c:	c3                   	ret
  1d:	90                   	nop
  1e:	0f 1f 00             	nopl   (%rax)
  21:	51                   	push   %rcx
  22:	52                   	push   %rdx
  23:	55                   	push   %rbp
  24:	89 e5                	mov    %esp,%ebp
  26:	0f 34                	sysenter
  28:	cd 80                	int    $0x80
* 2a:	5d                   	pop    %rbp <-- trapping instruction
  2b:	5a                   	pop    %rdx
  2c:	59                   	pop    %rcx
  2d:	c3                   	ret
  2e:	58                   	pop    %rax
  2f:	b8 77 00 00 00       	mov    $0x77,%eax
  34:	cd 80                	int    $0x80
  36:	0f 0b                	ud2
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	b8                   	.byte 0xb8
  3f:	ad                   	lods   %ds:(%rsi),%eax