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BUG: KASAN: vmalloc-out-of-bounds in cleanup_bitmap_list+0x187/0x500 fs/reiserfs/journal.c:231
Read of size 8 at addr ffffc90004705000 by task syz-executor/5126

CPU: 1 PID: 5126 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:420
 kasan_report+0x10b/0x140 mm/kasan/report.c:524
 cleanup_bitmap_list+0x187/0x500 fs/reiserfs/journal.c:231
 cleanup_freed_for_journal_list fs/reiserfs/journal.c:570 [inline]
 flush_commit_list+0x13fa/0x1d80 fs/reiserfs/journal.c:1142
 do_journal_end+0x314d/0x4790 fs/reiserfs/journal.c:4304
 do_journal_release+0x2ef/0x540 fs/reiserfs/journal.c:1928
 journal_release+0x1b/0x30 fs/reiserfs/journal.c:1971
 reiserfs_put_super+0x21e/0x480 fs/reiserfs/super.c:616
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1191
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f994a9909f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe5f1257c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f994aa11d7d RCX: 00007f994a9909f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe5f125880
RBP: 00007ffe5f125880 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe5f126910
R13: 00007f994aa11d7d R14: 0000000000019cda R15: 00007ffe5f126950
 </TASK>

The buggy address belongs to a 59-page vmalloc region starting at 0xffffc900046ca000 allocated at reiserfs_allocate_list_bitmaps+0x141/0x220 fs/reiserfs/journal.c:290
Memory state around the buggy address:
 ffffc90004704f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90004704f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90004705000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffc90004705080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90004705100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
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