==================================================================
BUG: KASAN: use-after-free in ext4_read_inline_data+0x1f8/0x2e0 fs/ext4/inline.c:209
Read of size 68 at addr ffff888127f450cf by task syz-executor.2/459

CPU: 0 PID: 459 Comm: syz-executor.2 Not tainted 6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x184/0x200 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x163/0x550 mm/kasan/report.c:488
 kasan_report+0x15f/0x190 mm/kasan/report.c:601
 kasan_check_range+0x238/0x2b0 mm/kasan/generic.c:189
 __asan_memcpy+0x2d/0x70 mm/kasan/shadow.c:105
 ext4_read_inline_data+0x1f8/0x2e0 fs/ext4/inline.c:209
 ext4_convert_inline_data_nolock+0x11e/0x910 fs/ext4/inline.c:1187
 ext4_try_add_inline_entry+0x7ff/0xb60 fs/ext4/inline.c:1313
 ext4_add_entry+0x57c/0x24d0 fs/ext4/namei.c:2405
 ext4_mkdir+0x550/0xce0 fs/ext4/namei.c:3028
 vfs_mkdir+0x2f9/0x4b0 fs/namei.c:4123
 do_mkdirat+0x218/0x310 fs/namei.c:4146
 __do_sys_mkdirat fs/namei.c:4161 [inline]
 __se_sys_mkdirat fs/namei.c:4159 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4159
 x64_sys_call+0x22cc/0x2cd0 arch/x86/include/generated/asm/syscalls_64.h:259
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x54/0x120 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f337647c9a7
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:00007f337716aef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f337716af80 RCX: 00007f337647c9a7
RDX: 00000000000001ff RSI: 0000000020000580 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000580
R13: 00007f337716af40 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x127f45
flags: 0x4000000000000000(zone=1)
page_type: 0xffffffff()
raw: 4000000000000000 dead000000000100 dead000000000122 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:
 ffff888127f44f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888127f45000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888127f45080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff888127f45100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888127f45180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT4-fs error (device loop2): ext4_check_all_de:655: inode #12: block 5: comm syz-executor.2: bad entry in directory: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, size=124 fake=0