------------[ cut here ]------------
kernel BUG at fs/reiserfs/journal.c:505!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6290 Comm: syz.4.450 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:reiserfs_in_journal+0xa87/0xa90 fs/reiserfs/journal.c:505
Code: 24 30 80 e2 07 80 c2 03 38 ca 0f 8c 74 fe ff ff 48 8b 7c 24 30 48 89 c3 e8 d6 5b be ff 48 89 d8 e9 5f fe ff ff e8 29 f8 79 ff <0f> 0b 0f 1f 80 00 00 00 00 55 41 57 41 56 41 55 41 54 53 50 49 89
RSP: 0018:ffffc90003756f80 EFLAGS: 00010287
RAX: ffffffff81fdcbf7 RBX: ffff888146ba0000 RCX: 0000000000080000
RDX: ffffc9000ebe1000 RSI: 00000000000007ec RDI: 00000000000007ed
RBP: 00000000000005a6 R08: ffffc900037570c0 R09: ffffed100bc66209
R10: ffffed100bc66209 R11: 1ffff1100bc66208 R12: ffffc90003689048
R13: ffffc90003689050 R14: dffffc0000000000 R15: 0000000000000213
FS:  00007fafab5466c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f183b140000 CR3: 0000000061efe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 is_block_in_journal fs/reiserfs/bitmap.c:125 [inline]
 scan_bitmap_block+0x488/0xdb0 fs/reiserfs/bitmap.c:203
 scan_bitmap fs/reiserfs/bitmap.c:408 [inline]
 allocate_without_wrapping_disk fs/reiserfs/bitmap.c:1161 [inline]
 blocknrs_and_prealloc_arrays_from_search_start fs/reiserfs/bitmap.c:1274 [inline]
 reiserfs_allocate_blocknrs+0x370b/0x53b0 fs/reiserfs/bitmap.c:1375
 _allocate_block fs/reiserfs/inode.c:-1 [inline]
 reiserfs_get_block+0x266e/0x4100 fs/reiserfs/inode.c:764
 __block_write_begin_int+0x54e/0x15a0 fs/buffer.c:2012
 reiserfs_write_begin+0x34b/0x810 fs/reiserfs/inode.c:2790
 generic_cont_expand_simple+0xe9/0x190 fs/buffer.c:2362
 reiserfs_setattr+0x42f/0x1010 fs/reiserfs/inode.c:3319
 notify_change+0xbcd/0xee0 fs/attr.c:505
 do_truncate+0x197/0x220 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: 0033:0x7fafad6ffb69
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:00007fafab546038 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007fafad927080 RCX: 00007fafad6ffb69
RDX: 0000000000000000 RSI: 00000000003af001 RDI: 000000000000000c
RBP: 00007fafad782df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fafad927080 R15: 00007ffc27259eb8
 </TASK>
Modules linked in:
---[ end trace def7ad0ebb90a3f3 ]---
RIP: 0010:reiserfs_in_journal+0xa87/0xa90 fs/reiserfs/journal.c:505
Code: 24 30 80 e2 07 80 c2 03 38 ca 0f 8c 74 fe ff ff 48 8b 7c 24 30 48 89 c3 e8 d6 5b be ff 48 89 d8 e9 5f fe ff ff e8 29 f8 79 ff <0f> 0b 0f 1f 80 00 00 00 00 55 41 57 41 56 41 55 41 54 53 50 49 89
RSP: 0018:ffffc90003756f80 EFLAGS: 00010287
RAX: ffffffff81fdcbf7 RBX: ffff888146ba0000 RCX: 0000000000080000
RDX: ffffc9000ebe1000 RSI: 00000000000007ec RDI: 00000000000007ed
RBP: 00000000000005a6 R08: ffffc900037570c0 R09: ffffed100bc66209
R10: ffffed100bc66209 R11: 1ffff1100bc66208 R12: ffffc90003689048
R13: ffffc90003689050 R14: dffffc0000000000 R15: 0000000000000213
FS:  00007fafab5466c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb719464f98 CR3: 0000000061efe000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400