REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using tea hash to sort names
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
REISERFS warning: vs-16090 direntry_bytes_number: bytes number is asked for direntry
REISERFS panic: item_ops-1 direntry_check_left: free space 124, entry_count 3
------------[ cut here ]------------
kernel BUG at fs/reiserfs/prints.c:390!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5064 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__reiserfs_panic+0x122/0x170 fs/reiserfs/prints.c:390
Code: 48 c7 c2 a0 5b 3b 8a 48 0f 44 d0 4c 0f 44 f0 48 c7 c7 c0 5c 3b 8a 4c 89 f6 48 8b 4c 24 10 49 c7 c0 20 de 3f 96 e8 be 4e ff ff <0f> 0b e8 b7 fd c6 f7 49 81 c7 a8 06 00 00 4d 85 f6 48 c7 c0 80 5b
RSP: 0018:ffffc90002fce960 EFLAGS: 00010246
RAX: 000000000000004d RBX: 1ffff920005f9d30 RCX: ae2ed2bc6737f900
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90002fcea68 R08: ffff8880b902795b R09: 1ffff11017204f2b
R10: dffffc0000000000 R11: ffffed1017204f2c R12: ffffc90002fce9a0
R13: dffffc0000000000 R14: ffffffff8a3bb600 R15: 0000000000000000
FS:  00007f2f8348e6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2f83e785c0 CR3: 000000007ce3b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 direntry_check_left+0x273/0x300 fs/reiserfs/item_ops.c:542
 get_num_ver+0x624/0xfe0 fs/reiserfs/fix_node.c:515
 ip_check_balance fs/reiserfs/fix_node.c:1523 [inline]
 check_balance fs/reiserfs/fix_node.c:2083 [inline]
 fix_nodes+0x28cf/0x8340 fs/reiserfs/fix_node.c:2635
 reiserfs_paste_into_item+0x60b/0x810 fs/reiserfs/stree.c:2130
 reiserfs_get_block+0x1c3a/0x42a0 fs/reiserfs/inode.c:1077
 __block_write_begin_int+0x565/0x15d0 fs/buffer.c:2012
 reiserfs_write_begin+0x34b/0x810 fs/reiserfs/inode.c:2790
 generic_cont_expand_simple+0xf0/0x1a0 fs/buffer.c:2362
 reiserfs_setattr+0x3ee/0x1090 fs/reiserfs/inode.c:3319
 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: 0033:0x7f2f83e2ae79
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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2f8348e028 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007f2f84095fa0 RCX: 00007f2f83e2ae79
RDX: 0000000000000000 RSI: 0000000008008976 RDI: 0000000000000006
RBP: 00007f2f83ebdee0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2f84096038 R14: 00007f2f84095fa0 R15: 00007fff5c0192c8
 </TASK>
Modules linked in:
---[ end trace a795d653c41e9884 ]---
RIP: 0010:__reiserfs_panic+0x122/0x170 fs/reiserfs/prints.c:390
Code: 48 c7 c2 a0 5b 3b 8a 48 0f 44 d0 4c 0f 44 f0 48 c7 c7 c0 5c 3b 8a 4c 89 f6 48 8b 4c 24 10 49 c7 c0 20 de 3f 96 e8 be 4e ff ff <0f> 0b e8 b7 fd c6 f7 49 81 c7 a8 06 00 00 4d 85 f6 48 c7 c0 80 5b
RSP: 0018:ffffc90002fce960 EFLAGS: 00010246
RAX: 000000000000004d RBX: 1ffff920005f9d30 RCX: ae2ed2bc6737f900
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90002fcea68 R08: ffff8880b902795b R09: 1ffff11017204f2b
R10: dffffc0000000000 R11: ffffed1017204f2c R12: ffffc90002fce9a0
R13: dffffc0000000000 R14: ffffffff8a3bb600 R15: 0000000000000000
FS:  00007f2f8348e6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0a45325000 CR3: 000000007ce3b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400