REISERFS (device loop5): journal params: device loop5, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop5): checking transaction log (loop5)
REISERFS (device loop5): Using r5 hash to sort names
==================================================================
BUG: KASAN: use-after-free in strlen+0x54/0x70 lib/string.c:495
Read of size 1 at addr ffff00010dcda1b3 by task syz-executor.5/29015

CPU: 1 PID: 29015 Comm: syz-executor.5 Not tainted 6.1.28-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:395
 kasan_report+0xd4/0x130 mm/kasan/report.c:495
 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
 strlen+0x54/0x70 lib/string.c:495
 set_de_name_and_namelen fs/reiserfs/namei.c:82 [inline]
 search_by_entry_key+0x7d0/0xe88 fs/reiserfs/namei.c:172
 reiserfs_find_entry+0xd20/0x149c fs/reiserfs/namei.c:322
 reiserfs_lookup+0x184/0x3c4 fs/reiserfs/namei.c:368
 __lookup_slow+0x250/0x374 fs/namei.c:1685
 lookup_one_len+0x178/0x28c fs/namei.c:2711
 reiserfs_lookup_privroot+0x8c/0x204 fs/reiserfs/xattr.c:973
 reiserfs_fill_super+0x15b4/0x2028 fs/reiserfs/super.c:2192
 mount_bdev+0x26c/0x368 fs/super.c:1423
 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
 vfs_get_tree+0x90/0x274 fs/super.c:1553
 do_new_mount+0x25c/0x8c8 fs/namespace.c:3040
 path_mount+0x590/0xe58 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581

The buggy address belongs to the physical page:
page:00000000891df125 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x14dcda
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff00010dcda080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff00010dcda100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff00010dcda180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                     ^
 ffff00010dcda200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff00010dcda280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================