syzbot

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| 0| *3.6* [2 5 0x0 SD], item_len 44, item_location 4052, free_space(entry_count) 65535 |
	mode | size | nlinks | first direct | mtime
	0100000 |   3840 |  1 | 0 | 1721573159
===================================================================
REISERFS panic (device loop0): PAP-5580 reiserfs_cut_from_item: item to convert does not exist ([2 5 0x1 IND])
------------[ cut here ]------------
kernel BUG at fs/reiserfs/prints.c:390!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3501 Comm: syz-executor170 Not tainted 5.15.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__reiserfs_panic+0x13a/0x140 fs/reiserfs/prints.c:390
Code: c7 c1 c0 63 9b 8a 48 0f 44 c8 48 0f 44 d8 48 c7 c7 80 64 9b 8a 4c 89 fe 48 89 da 4d 89 f0 49 c7 c1 20 70 51 91 e8 f6 26 0f 08 <0f> 0b 0f 1f 40 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4
RSP: 0018:ffffc900025671a0 EFLAGS: 00010246
RAX: 000000000000006e RBX: ffffffff8a9b82a0 RCX: aa065615be077d00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90002567290 R08: ffffffff8166868c R09: fffff520004acd75
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8a9b82c0
R13: ffffc900025671c0 R14: ffffffff8c17c094 R15: ffff888015ff66a8
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f32253a1db8 CR3: 000000000c68e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 reiserfs_cut_from_item+0x213e/0x2560 fs/reiserfs/stree.c:1729
 reiserfs_do_truncate+0xa12/0x15b0 fs/reiserfs/stree.c:1973
 reiserfs_truncate_file+0x638/0xda0 fs/reiserfs/inode.c:2318
 reiserfs_file_release+0x8c6/0xaa0 fs/reiserfs/file.c:109
 __fput+0x3fe/0x8e0 fs/file_table.c:280
 task_work_run+0x129/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0x6a3/0x2480 kernel/exit.c:874
 do_group_exit+0x144/0x310 kernel/exit.c:996
 __do_sys_exit_group kernel/exit.c:1007 [inline]
 __se_sys_exit_group kernel/exit.c:1005 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1005
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3225357b89
Code: Unable to access opcode bytes at RIP 0x7f3225357b5f.
RSP: 002b:00007ffc941f5d58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3225357b89
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f32253d32d0 R08: ffffffffffffffb8 R09: 00005555568c64c0
R10: 00005555568c64c0 R11: 0000000000000246 R12: 00007f32253d32d0
R13: 0000000000000000 R14: 00007f32253d4040 R15: 00007f3225325da0
 </TASK>
Modules linked in:
---[ end trace d122d151453212d7 ]---
RIP: 0010:__reiserfs_panic+0x13a/0x140 fs/reiserfs/prints.c:390
Code: c7 c1 c0 63 9b 8a 48 0f 44 c8 48 0f 44 d8 48 c7 c7 80 64 9b 8a 4c 89 fe 48 89 da 4d 89 f0 49 c7 c1 20 70 51 91 e8 f6 26 0f 08 <0f> 0b 0f 1f 40 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4
RSP: 0018:ffffc900025671a0 EFLAGS: 00010246
RAX: 000000000000006e RBX: ffffffff8a9b82a0 RCX: aa065615be077d00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90002567290 R08: ffffffff8166868c R09: fffff520004acd75
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8a9b82c0
R13: ffffc900025671c0 R14: ffffffff8c17c094 R15: ffff888015ff66a8
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f32253a1db8 CR3: 000000000c68e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400