==================================================================
BUG: KASAN: use-after-free in ext4_read_inline_data fs/ext4/inline.c:210 [inline]
BUG: KASAN: use-after-free in ext4_convert_inline_data_nolock+0x319/0xda0 fs/ext4/inline.c:1237
Read of size 68 at addr ffff888125d220cf by task syz-executor/519

CPU: 0 PID: 519 Comm: syz-executor Not tainted 5.15.167-syzkaller-1075712-g5e4635681cf1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
 print_address_description+0x87/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:444
 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189
 memcpy+0x2d/0x70 mm/kasan/shadow.c:65
 ext4_read_inline_data fs/ext4/inline.c:210 [inline]
 ext4_convert_inline_data_nolock+0x319/0xda0 fs/ext4/inline.c:1237
 ext4_try_add_inline_entry+0x7ff/0xb60 fs/ext4/inline.c:1363
 ext4_add_entry+0x6c2/0x12b0 fs/ext4/namei.c:2456
 ext4_mkdir+0x54f/0xce0 fs/ext4/namei.c:3079
 vfs_mkdir+0x3f6/0x610 fs/namei.c:4065
 do_mkdirat+0x1eb/0x450 fs/namei.c:4090
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4103
 x64_sys_call+0x6c6/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7efd73ef19e7
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007efd73a53ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007efd73a53f80 RCX: 00007efd73ef19e7
RDX: 00000000000001ff RSI: 0000000020000580 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000580
R13: 00007efd73a53f40 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to the page:
page:ffffea0004974880 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x125d22
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea00049748c8 ffffea0004974848 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffff888125d21f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888125d22000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888125d22080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff888125d22100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888125d22180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT4-fs error (device loop0): ext4_check_all_de:656: inode #12: block 5: comm syz-executor: bad entry in directory: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, size=124 fake=0