REISERFS (device loop4): 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 ffff000144d547a3 by task syz-executor.4/15559

CPU: 0 PID: 15559 Comm: syz-executor.4 Not tainted 6.4.0-rc3-syzkaller-geb0f1697d729 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233
 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240
 __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:351 [inline]
 print_report+0x174/0x514 mm/kasan/report.c:462
 kasan_report+0xd4/0x130 mm/kasan/report.c:572
 __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:1690
 lookup_one_len+0x178/0x28c fs/namei.c:2742
 reiserfs_lookup_privroot+0x8c/0x184 fs/reiserfs/xattr.c:976
 reiserfs_fill_super+0x15b4/0x2028 fs/reiserfs/super.c:2192
 mount_bdev+0x26c/0x368 fs/super.c:1380
 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:1510
 do_new_mount+0x25c/0x8c8 fs/namespace.c:3039
 path_mount+0x590/0xe04 fs/namespace.c:3369
 do_mount fs/namespace.c:3382 [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+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

The buggy address belongs to the physical page:
page:0000000059b28756 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x1 pfn:0x184d54
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffff7f(buddy)
raw: 05ffc00000000000 fffffc000523f008 fffffc0005215a08 0000000000000000
raw: 0000000000000001 0000000000000002 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff000144d54680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff000144d54700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff000144d54780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                               ^
 ffff000144d54800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff000144d54880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
reiserfs: enabling write barrier flush mode
REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 1 0(1) DIR], item_len 35, item_location 3937, free_space(entry_count) 2
REISERFS error (device loop4): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS (device loop4): Remounting filesystem read-only
REISERFS error (device loop4): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [2 1 0x0 SD] stat data
REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 1 0(1) DIR], item_len 35, item_location 3937, free_space(entry_count) 2
REISERFS error (device loop4): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS error (device loop4): zam-7001 reiserfs_find_entry: io error
REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 1 0(1) DIR], item_len 35, item_location 3937, free_space(entry_count) 2
REISERFS error (device loop4): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS error (device loop4): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [2 1 0x0 SD] stat data
REISERFS warning (device loop4): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount.