list_del corruption, ffffea0001300090->next is NULL
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:53!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 29994 Comm: syz.8.7010 Not tainted 6.14.0-rc2-next-20250210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__list_del_entry_valid_or_report+0xe0/0x190 lib/list_debug.c:52
Code: 4d 39 3c 24 0f 85 9e 00 00 00 b0 01 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 48 c7 c7 40 dd 60 8c 4c 89 fe e8 b1 0c 36 fc 90 <0f> 0b 48 c7 c7 a0 dd 60 8c 4c 89 fe e8 9f 0c 36 fc 90 0f 0b 48 89
RSP: 0018:ffffc9000ca36f90 EFLAGS: 00010046
RAX: 0000000000000033 RBX: 0000000000000000 RCX: 498444e3d850bc00
RDX: ffffc9000e9f2000 RSI: 000000000000efb4 RDI: 000000000000efb5
RBP: ffffc9000ca37190 R08: ffffffff819f3f8c R09: 1ffff92001946d8c
R10: dffffc0000000000 R11: fffff52001946d8d R12: ffff888144355000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea0001300090
FS:  00007fbd7aa7d6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c365a8e CR3: 000000005ceac000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del_init include/linux/list.h:287 [inline]
 __folio_split+0xfda/0x16d0 mm/huge_memory.c:3852
 truncate_inode_partial_folio+0x9b1/0xdc0 mm/truncate.c:248
 shmem_undo_range+0x82f/0x1820 mm/shmem.c:1130
 shmem_truncate_range mm/shmem.c:1224 [inline]
 shmem_fallocate+0x431/0xf20 mm/shmem.c:3674
 vfs_fallocate+0x623/0x7a0 fs/open.c:338
 madvise_remove mm/madvise.c:1034 [inline]
 madvise_vma_behavior mm/madvise.c:1269 [inline]
 madvise_walk_vmas mm/madvise.c:1511 [inline]
 madvise_do_behavior+0x1f29/0x3c00 mm/madvise.c:1646
 do_madvise mm/madvise.c:1744 [inline]
 __do_sys_madvise mm/madvise.c:1752 [inline]
 __se_sys_madvise mm/madvise.c:1750 [inline]
 __x64_sys_madvise+0x11b/0x140 mm/madvise.c:1750
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbd79b8cde9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbd7aa7d038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fbd79da6160 RCX: 00007fbd79b8cde9
RDX: 0000000000000009 RSI: 0000000000600000 RDI: 0000400000000000
RBP: 00007fbd79c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbd79da6160 R15: 00007ffe9e2880f8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0xe0/0x190 lib/list_debug.c:52
Code: 4d 39 3c 24 0f 85 9e 00 00 00 b0 01 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 48 c7 c7 40 dd 60 8c 4c 89 fe e8 b1 0c 36 fc 90 <0f> 0b 48 c7 c7 a0 dd 60 8c 4c 89 fe e8 9f 0c 36 fc 90 0f 0b 48 89
RSP: 0018:ffffc9000ca36f90 EFLAGS: 00010046
RAX: 0000000000000033 RBX: 0000000000000000 RCX: 498444e3d850bc00
RDX: ffffc9000e9f2000 RSI: 000000000000efb4 RDI: 000000000000efb5
RBP: ffffc9000ca37190 R08: ffffffff819f3f8c R09: 1ffff92001946d8c
R10: dffffc0000000000 R11: fffff52001946d8d R12: ffff888144355000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea0001300090
FS:  00007fbd7aa7d6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c365a8e CR3: 000000005ceac000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400