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BUG: KASAN: vmalloc-out-of-bounds in cleanup_bitmap_list+0x175/0x500 fs/reiserfs/journal.c:230
Read of size 8 at addr ffffc90004a04000 by task syz-executor.2/13719

CPU: 0 PID: 13719 Comm: syz-executor.2 Not tainted 6.7.0-rc5-syzkaller-00125-gc7402612e2e6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x163/0x540 mm/kasan/report.c:475
 kasan_report+0x142/0x170 mm/kasan/report.c:588
 cleanup_bitmap_list+0x175/0x500 fs/reiserfs/journal.c:230
 cleanup_freed_for_journal_list fs/reiserfs/journal.c:569 [inline]
 flush_commit_list+0x12f2/0x1c50 fs/reiserfs/journal.c:1141
 get_list_bitmap+0x160/0x320 fs/reiserfs/journal.c:321
 do_journal_end+0x3df2/0x4b40 fs/reiserfs/journal.c:4358
 do_journal_begin_r+0x970/0x1030
 journal_begin+0x14c/0x360 fs/reiserfs/journal.c:3254
 reiserfs_mkdir+0x34a/0x8f0 fs/reiserfs/namei.c:831
 xattr_mkdir fs/reiserfs/xattr.c:77 [inline]
 create_privroot fs/reiserfs/xattr.c:891 [inline]
 reiserfs_xattr_init+0x355/0x6c0 fs/reiserfs/xattr.c:1007
 reiserfs_remount+0x12bc/0x18f0 fs/reiserfs/super.c:1586
 reconfigure_super+0x440/0x870 fs/super.c:1143
 do_remount fs/namespace.c:2884 [inline]
 path_mount+0xc24/0xfa0 fs/namespace.c:3656
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7faac4a7cba9
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:00007faac56f60c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007faac4b9bf80 RCX: 00007faac4a7cba9
RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000000
RBP: 00007faac4ac847a R08: 0000000020000000 R09: 0000000000000000
R10: 000000000200a06a R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007faac4b9bf80 R15: 00007fff96383f58
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc900049c9000, ffffc90004a05000) created by:
 reiserfs_allocate_list_bitmaps+0xa1/0x220 fs/reiserfs/journal.c:289

Memory state around the buggy address:
 ffffc90004a03f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90004a03f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90004a04000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffc90004a04080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90004a04100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
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