------------[ cut here ]------------
kernel BUG at fs/reiserfs/stree.c:1568!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5110 Comm: syz-executor.4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:maybe_indirect_to_direct fs/reiserfs/stree.c:1568 [inline]
RIP: 0010:reiserfs_cut_from_item+0x1d70/0x1fa0 fs/reiserfs/stree.c:1694
Code: e9 20 f7 ff ff 44 89 e9 80 e1 07 38 c1 0f 8c 25 f7 ff ff be 04 00 00 00 4c 89 ef e8 aa f7 bd ff e9 13 f7 ff ff e8 80 eb 78 ff <0f> 0b e8 79 eb 78 ff 0f 0b e8 72 eb 78 ff 0f 0b e8 6b eb 78 ff 0f
RSP: 0018:ffffc9000314f320 EFLAGS: 00010293
RAX: ffffffff82003590 RBX: 0000000000000e00 RCX: ffff88807ad49dc0
RDX: 0000000000000000 RSI: 0000000000000e00 RDI: 0000000000000000
RBP: ffffc9000314f830 R08: ffff88807ad49dc0 R09: 0000000000000002
R10: 00000000fffffffe R11: 0000000000000000 R12: 0000000000000000
R13: ffffc9000314f9c0 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f24cbd296c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f45c72db000 CR3: 00000000612c7000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 reiserfs_do_truncate+0xa09/0x1390 fs/reiserfs/stree.c:1973
 reiserfs_truncate_file+0x666/0xe40 fs/reiserfs/inode.c:2318
 reiserfs_setattr+0xab3/0x1090 fs/reiserfs/inode.c:3409
 notify_change+0xbcd/0xee0 fs/attr.c:505
 do_truncate+0x1ac/0x240 fs/open.c:65
 do_sys_ftruncate+0x31b/0x3d0 fs/open.c:193
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f24d49b9079
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f24cbd290b8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007f24d4af8050 RCX: 00007f24d49b9079
RDX: 0000000000000000 RSI: 0000000000000e00 RDI: 0000000000000006
RBP: 00007f24d4a1a498 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f24d4af8050 R15: 00007fffd4aac878
 </TASK>
Modules linked in:

---[ end trace e1c5bc5dd917a39a ]---
RIP: 0010:maybe_indirect_to_direct fs/reiserfs/stree.c:1568 [inline]
RIP: 0010:reiserfs_cut_from_item+0x1d70/0x1fa0 fs/reiserfs/stree.c:1694
Code: e9 20 f7 ff ff 44 89 e9 80 e1 07 38 c1 0f 8c 25 f7 ff ff be 04 00 00 00 4c 89 ef e8 aa f7 bd ff e9 13 f7 ff ff e8 80 eb 78 ff <0f> 0b e8 79 eb 78 ff 0f 0b e8 72 eb 78 ff 0f 0b e8 6b eb 78 ff 0f
RSP: 0018:ffffc9000314f320 EFLAGS: 00010293
RAX: ffffffff82003590 RBX: 0000000000000e00 RCX: ffff88807ad49dc0
RDX: 0000000000000000 RSI: 0000000000000e00 RDI: 0000000000000000
RBP: ffffc9000314f830 R08: ffff88807ad49dc0 R09: 0000000000000002
R10: 00000000fffffffe R11: 0000000000000000 R12: 0000000000000000
R13: ffffc9000314f9c0 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f24cbd296c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f45c72c8000 CR3: 00000000612c7000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400