------------[ cut here ]------------
kernel BUG at fs/reiserfs/item_ops.c:569!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5200 Comm: syz.0.18 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:direntry_check_right+0x262/0x270 fs/reiserfs/item_ops.c:569
Code: e9 4b ff ff ff 44 89 f9 80 e1 07 38 c1 0f 8c 51 ff ff ff be 04 00 00 00 4c 89 ff e8 68 8a bc ff e9 3f ff ff ff e8 5e 26 78 ff <0f> 0b e8 57 26 78 ff 0f 0b 0f 1f 44 00 00 55 41 57 41 56 41 55 41
RSP: 0018:ffffc900034df0f8 EFLAGS: 00010293
RAX: ffffffff81ff9dc2 RBX: dffffc0000000000 RCX: ffff88807b290000
RDX: 0000000000000000 RSI: 0000000000000018 RDI: 0000000000000040
RBP: ffff88807415c152 R08: ffff88807b290000 R09: 0000000000000002
R10: 0000000000000070 R11: 0000000000000000 R12: ffff88807415c14e
R13: 0000000000000018 R14: fffffffffffffffe R15: 0000000000000028
FS:  000055556106d500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4fff3ae000 CR3: 0000000077bd0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 check_right+0x4ea/0x7f0 fs/reiserfs/fix_node.c:355
 dc_check_balance_leaf fs/reiserfs/fix_node.c:1983 [inline]
 dc_check_balance fs/reiserfs/fix_node.c:2039 [inline]
 check_balance fs/reiserfs/fix_node.c:2086 [inline]
 fix_nodes+0x3dc4/0x82d0 fs/reiserfs/fix_node.c:2635
 reiserfs_cut_from_item+0x2e8/0x1ef0 fs/reiserfs/stree.c:1742
 reiserfs_do_truncate+0xa90/0x13e0 fs/reiserfs/stree.c:1973
 reiserfs_truncate_file+0x632/0xdc0 fs/reiserfs/inode.c:2318
 reiserfs_file_release+0x8e0/0xa50 fs/reiserfs/file.c:109
 __fput+0x234/0x930 fs/file_table.c:311
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5c32f02be9
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:00007ffe6ca0c978 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000001e7ef RCX: 00007f5c32f02be9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f5c3312bda0 R08: 0000000000000001 R09: 000000056ca0cc6f
R10: 0000001b30120000 R11: 0000000000000246 R12: 00007f5c33129fac
R13: 00007f5c33129fa0 R14: ffffffffffffffff R15: 00007ffe6ca0ca90
 </TASK>
Modules linked in:
---[ end trace 70a8ca9c27abf846 ]---
RIP: 0010:direntry_check_right+0x262/0x270 fs/reiserfs/item_ops.c:569
Code: e9 4b ff ff ff 44 89 f9 80 e1 07 38 c1 0f 8c 51 ff ff ff be 04 00 00 00 4c 89 ff e8 68 8a bc ff e9 3f ff ff ff e8 5e 26 78 ff <0f> 0b e8 57 26 78 ff 0f 0b 0f 1f 44 00 00 55 41 57 41 56 41 55 41
RSP: 0018:ffffc900034df0f8 EFLAGS: 00010293
RAX: ffffffff81ff9dc2 RBX: dffffc0000000000 RCX: ffff88807b290000
RDX: 0000000000000000 RSI: 0000000000000018 RDI: 0000000000000040
RBP: ffff88807415c152 R08: ffff88807b290000 R09: 0000000000000002
R10: 0000000000000070 R11: 0000000000000000 R12: ffff88807415c14e
R13: 0000000000000018 R14: fffffffffffffffe R15: 0000000000000028
FS:  000055556106d500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30d63fff CR3: 0000000077bd0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400