------------[ cut here ]------------
kernel BUG at fs/reiserfs/item_ops.c:569!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 17261 Comm: syz-executor.1 Not tainted 6.6.0-syzkaller-15365-g305230142ae0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:direntry_check_right+0x26b/0x280 fs/reiserfs/item_ops.c:569
Code: df e9 38 ff ff ff 89 d9 80 e1 07 38 c1 0f 8c 3e ff ff ff be 04 00 00 00 48 89 df e8 7f 36 af ff e9 2c ff ff ff e8 d5 13 53 ff <0f> 0b e8 ce 13 53 ff 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3
RSP: 0018:ffffc90016856ff0 EFLAGS: 00010287
RAX: ffffffff823ba82b RBX: 0000000000000020 RCX: 0000000000040000
RDX: ffffc9000a012000 RSI: 00000000000084d6 RDI: 00000000000084d7
RBP: 0000000000000005 R08: ffffffff823ba69e R09: ffffffff8235650d
R10: 0000000000000004 R11: ffff88801c503b80 R12: 00000000fffffffe
R13: 0000000000000000 R14: 0000000000000002 R15: ffff888038cbc120
FS:  00007fad7703a6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31722000 CR3: 000000001679a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 check_right+0x4d1/0x770 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+0x3ff3/0x8ce0 fs/reiserfs/fix_node.c:2636
 reiserfs_cut_from_item+0x466/0x2580 fs/reiserfs/stree.c:1740
 reiserfs_do_truncate+0x9b9/0x14c0 fs/reiserfs/stree.c:1971
 reiserfs_truncate_file+0x4da/0x820 fs/reiserfs/inode.c:2302
 reiserfs_setattr+0xbc9/0x1140 fs/reiserfs/inode.c:3388
 notify_change+0xb99/0xe60 fs/attr.c:499
 do_truncate+0x220/0x300 fs/open.c:66
 do_sys_ftruncate+0x2f3/0x390 fs/open.c:194
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fad7627cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fad7703a0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007fad7639bf80 RCX: 00007fad7627cae9
RDX: 0000000000000000 RSI: 0000000000000e5c RDI: 0000000000000005
RBP: 00007fad762c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fad7639bf80 R15: 00007ffd75299eb8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:direntry_check_right+0x26b/0x280 fs/reiserfs/item_ops.c:569
Code: df e9 38 ff ff ff 89 d9 80 e1 07 38 c1 0f 8c 3e ff ff ff be 04 00 00 00 48 89 df e8 7f 36 af ff e9 2c ff ff ff e8 d5 13 53 ff <0f> 0b e8 ce 13 53 ff 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3
RSP: 0018:ffffc90016856ff0 EFLAGS: 00010287
RAX: ffffffff823ba82b RBX: 0000000000000020 RCX: 0000000000040000
RDX: ffffc9000a012000 RSI: 00000000000084d6 RDI: 00000000000084d7
RBP: 0000000000000005 R08: ffffffff823ba69e R09: ffffffff8235650d
R10: 0000000000000004 R11: ffff88801c503b80 R12: 00000000fffffffe
R13: 0000000000000000 R14: 0000000000000002 R15: ffff888038cbc120
FS:  00007fad7703a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6db11fe000 CR3: 000000001679a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400