REISERFS panic (device loop2): vs-12195 balance_leaf: CFR not initialized
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kernel BUG at fs/reiserfs/prints.c:390!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6942 Comm: syz.2.158 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__reiserfs_panic+0x13e/0x140 fs/reiserfs/prints.c:390
Code: c7 c1 00 85 bc 8a 48 0f 44 c8 4c 0f 44 f0 48 c7 c7 c0 85 bc 8a 4c 89 fe 4c 89 f2 49 89 d8 49 c7 c1 40 61 fc 96 e8 12 66 ff ff <0f> 0b 66 0f 1f 00 53 48 89 fb e8 63 cb 28 f7 48 c7 c7 40 8e bc 8a
RSP: 0018:ffffc9000c606700 EFLAGS: 00010246
RAX: 0000000000000049 RBX: ffffffff8c583c48 RCX: c618c301c9dccd00
RDX: ffffc9000f013000 RSI: 00000000000098de RDI: 00000000000098df
RBP: ffffc9000c6067f0 R08: ffffc9000c606407 R09: 1ffff920018c0c80
R10: dffffc0000000000 R11: fffff520018c0c81 R12: ffffffff8abc2780
R13: ffffc9000c606720 R14: ffffffff8abc2760 R15: ffff88806506c660
FS:  00007fb7f76966c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0f015f7000 CR3: 000000007b029000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 balance_leaf+0xd301/0x10da0 fs/reiserfs/do_balan.c:1439
 do_balance+0x2fe/0x940 fs/reiserfs/do_balan.c:1888
 reiserfs_paste_into_item+0x6a1/0x7f0 fs/reiserfs/stree.c:2157
 reiserfs_get_block+0x1bd3/0x3ed0 fs/reiserfs/inode.c:1069
 __block_write_begin_int+0x566/0x1ad0 fs/buffer.c:2124
 reiserfs_write_begin+0x20a/0x4c0 fs/reiserfs/inode.c:2771
 generic_perform_write+0x2fb/0x5b0 mm/filemap.c:4031
 generic_file_write_iter+0xaf/0x2e0 mm/filemap.c:4152
 call_write_iter include/linux/fs.h:2018 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x43b/0x940 fs/read_write.c:584
 ksys_write+0x147/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb7f678f749
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:00007fb7f7696038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb7f69e6180 RCX: 00007fb7f678f749
RDX: 0000000000000161 RSI: 00002000000005c0 RDI: 0000000000000008
RBP: 00007fb7f6813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7f69e6218 R14: 00007fb7f69e6180 R15: 00007fffbd54f4d8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__reiserfs_panic+0x13e/0x140 fs/reiserfs/prints.c:390
Code: c7 c1 00 85 bc 8a 48 0f 44 c8 4c 0f 44 f0 48 c7 c7 c0 85 bc 8a 4c 89 fe 4c 89 f2 49 89 d8 49 c7 c1 40 61 fc 96 e8 12 66 ff ff <0f> 0b 66 0f 1f 00 53 48 89 fb e8 63 cb 28 f7 48 c7 c7 40 8e bc 8a
RSP: 0018:ffffc9000c606700 EFLAGS: 00010246
RAX: 0000000000000049 RBX: ffffffff8c583c48 RCX: c618c301c9dccd00
RDX: ffffc9000f013000 RSI: 00000000000098de RDI: 00000000000098df
RBP: ffffc9000c6067f0 R08: ffffc9000c606407 R09: 1ffff920018c0c80
R10: dffffc0000000000 R11: fffff520018c0c81 R12: ffffffff8abc2780
R13: ffffc9000c606720 R14: ffffffff8abc2760 R15: ffff88806506c660
FS:  00007fb7f76966c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0f015f7000 CR3: 000000007b029000 CR4: 00000000003506f0