==================================================================
BUG: KASAN: vmalloc-out-of-bounds in cleanup_bitmap_list+0x187/0x500 fs/reiserfs/journal.c:231
Read of size 8 at addr ffffc900012a8008 by task syz.0.15/5434

CPU: 0 PID: 5434 Comm: syz.0.15 Not tainted 5.15.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 cleanup_bitmap_list+0x187/0x500 fs/reiserfs/journal.c:231
 cleanup_freed_for_journal_list fs/reiserfs/journal.c:570 [inline]
 flush_commit_list+0x14a4/0x1d70 fs/reiserfs/journal.c:1139
 flush_journal_list+0x28d/0x1ba0 fs/reiserfs/journal.c:1388
 flush_used_journal_lists+0x126e/0x15d0 fs/reiserfs/journal.c:1826
 do_journal_end+0x3615/0x42d0 fs/reiserfs/journal.c:-1
 do_journal_begin_r+0xa36/0x1010 fs/reiserfs/journal.c:-1
 journal_begin+0x148/0x350 fs/reiserfs/journal.c:3253
 reiserfs_fill_super+0x1654/0x23e0 fs/reiserfs/super.c:2108
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3014
 do_mount fs/namespace.c:3357 [inline]
 __do_sys_mount fs/namespace.c:3565 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
 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: 0033:0x7fa438b4b69a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fa437dcae68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa437dcaef0 RCX: 00007fa438b4b69a
RDX: 0000000020001100 RSI: 0000000020001140 RDI: 00007fa437dcaeb0
RBP: 0000000020001100 R08: 00007fa437dcaef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020001140
R13: 00007fa437dcaeb0 R14: 00000000000010ef R15: 0000000020001180
 </TASK>


Memory state around the buggy address:
 ffffc900012a7f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc900012a7f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffc900012a8000: 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                      ^
 ffffc900012a8080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc900012a8100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================