------------[ cut here ]------------
kernel BUG at fs/reiserfs/item_ops.c:569!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4701 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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 a8 4f b7 ff e9 3f ff ff ff e8 9e 2d 67 ff <0f> 0b e8 97 2d 67 ff 0f 0b 0f 1f 44 00 00 55 41 57 41 56 41 55 41
RSP: 0018:ffffc900044772b8 EFLAGS: 00010293
RAX: ffffffff8219a2f2 RBX: dffffc0000000000 RCX: ffff88802ca71dc0
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000028
RBP: ffff8880781a80fe R08: ffff88802ca71dc0 R09: 0000000000000002
R10: 0000000000000070 R11: 0000000000000000 R12: ffff8880781a80fe
R13: 0000000000000020 R14: 0000000000000000 R15: 0000000000000008
FS:  000055556de75500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e7d05f180 CR3: 000000005d77c000 CR4: 00000000003506f0
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_unlink+0x3d7/0x6d0 fs/reiserfs/namei.c:1069
 vfs_unlink+0x385/0x600 fs/namei.c:4322
 do_unlinkat+0x324/0x560 fs/namei.c:4390
 __do_sys_unlink fs/namei.c:4438 [inline]
 __se_sys_unlink fs/namei.c:4436 [inline]
 __x64_sys_unlink+0x45/0x50 fs/namei.c:4436
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fad6b78e157
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 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:00007ffee2f3cd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fad6b78e157
RDX: 00007ffee2f3cd30 RSI: 00007ffee2f3cdc0 RDI: 00007ffee2f3cdc0
RBP: 00007ffee2f3cdc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffee2f3deb0
R13: 00007fad6b811c05 R14: 000000000004b742 R15: 00007ffee2f3ef80
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
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 a8 4f b7 ff e9 3f ff ff ff e8 9e 2d 67 ff <0f> 0b e8 97 2d 67 ff 0f 0b 0f 1f 44 00 00 55 41 57 41 56 41 55 41
RSP: 0018:ffffc900044772b8 EFLAGS: 00010293
RAX: ffffffff8219a2f2 RBX: dffffc0000000000 RCX: ffff88802ca71dc0
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000028
RBP: ffff8880781a80fe R08: ffff88802ca71dc0 R09: 0000000000000002
R10: 0000000000000070 R11: 0000000000000000 R12: ffff8880781a80fe
R13: 0000000000000020 R14: 0000000000000000 R15: 0000000000000008
FS:  000055556de75500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f35eb9b1000 CR3: 000000005d77c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400