REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using r5 hash to sort names
==================================================================
BUG: KASAN: use-after-free in strlen+0x54/0x70 lib/string.c:418
Read of size 1 at addr ffff0000e4c417a3 by task syz-executor.0/6546

CPU: 0 PID: 6546 Comm: syz-executor.0 Not tainted 6.7.0-rc6-syzkaller-00090-gaafe7ad77b91 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x174/0x514 mm/kasan/report.c:475
 kasan_report+0xd8/0x138 mm/kasan/report.c:588
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 strlen+0x54/0x70 lib/string.c:418
 set_de_name_and_namelen fs/reiserfs/namei.c:82 [inline]
 linear_search_in_dir_item fs/reiserfs/namei.c:262 [inline]
 reiserfs_find_entry+0x898/0x149c fs/reiserfs/namei.c:331
 reiserfs_lookup+0x17c/0x45c fs/reiserfs/namei.c:368
 __lookup_slow+0x250/0x374 fs/namei.c:1694
 lookup_one_len+0x178/0x28c fs/namei.c:2746
 reiserfs_lookup_privroot+0x8c/0x184 fs/reiserfs/xattr.c:977
 reiserfs_fill_super+0x15b4/0x2028 fs/reiserfs/super.c:2192
 mount_bdev+0x1e8/0x2b4 fs/super.c:1650
 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662
 vfs_get_tree+0x90/0x288 fs/super.c:1771
 do_new_mount+0x25c/0x8c8 fs/namespace.c:3337
 path_mount+0x590/0xe04 fs/namespace.c:3664
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount fs/namespace.c:3863 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3863
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595

The buggy address belongs to the physical page:
page:00000000e9554f5a refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x124c41
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000000000 fffffc0003931088 ffff0001b414abb0 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e4c41680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e4c41700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000e4c41780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                               ^
 ffff0000e4c41800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e4c41880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================