==================================================================
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+0x311/0xa70 fs/ext4/inline.c:1216
Read of size 68 at addr ffff888127d990cf by task syz-executor.3/472

CPU: 1 PID: 472 Comm: syz-executor.3 Not tainted 6.1.75-syzkaller #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+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:395
 kasan_report+0x13c/0x170 mm/kasan/report.c:495
 kasan_check_range+0x294/0x2a0 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+0x311/0xa70 fs/ext4/inline.c:1216
 ext4_try_add_inline_entry+0x7ff/0xb60 fs/ext4/inline.c:1342
 ext4_add_entry+0x5e4/0xed0 fs/ext4/namei.c:2409
 ext4_mkdir+0x54f/0xce0 fs/ext4/namei.c:3032
 vfs_mkdir+0x398/0x570 fs/namei.c:4114
 do_mkdirat+0x1dc/0x2c0 fs/namei.c:4139
 __do_sys_mkdirat fs/namei.c:4154 [inline]
 __se_sys_mkdirat fs/namei.c:4152 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4152
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f569167c9a7
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:00007f569247cef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f569247cf80 RCX: 00007f569167c9a7
RDX: 00000000000001ff RSI: 0000000020000580 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000580
R13: 00007f569247cf40 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to the physical page:
page:ffffea00049f6640 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x127d99
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea00049f6688 ffffea00049f6608 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 466, tgid 465 (syz-executor.3), ts 44478024375, free_ts 44478884169
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e2/0x1f0 mm/page_alloc.c:2513
 prep_new_page mm/page_alloc.c:2520 [inline]
 get_page_from_freelist+0x2df3/0x2ed0 mm/page_alloc.c:4279
 __alloc_pages+0x3c2/0x7d0 mm/page_alloc.c:5545
 __folio_alloc+0x15/0x40 mm/page_alloc.c:5577
 __folio_alloc_node include/linux/gfp.h:246 [inline]
 folio_alloc include/linux/gfp.h:275 [inline]
 alloc_page_vma include/linux/gfp.h:284 [inline]
 wp_page_copy+0x20c/0x1610 mm/memory.c:3129
 do_wp_page+0xb17/0xcb0
 handle_pte_fault mm/memory.c:5011 [inline]
 __handle_mm_fault mm/memory.c:5135 [inline]
 handle_mm_fault+0x147d/0x2c70 mm/memory.c:5256
 do_user_addr_fault arch/x86/mm/fault.c:1380 [inline]
 handle_page_fault arch/x86/mm/fault.c:1471 [inline]
 exc_page_fault+0x22e/0x580 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:570
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1440 [inline]
 free_pcp_prepare mm/page_alloc.c:1513 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3358
 free_unref_page_list+0xf1/0x7b0 mm/page_alloc.c:3499
 release_pages+0xf7f/0xfe0 mm/swap.c:1055
 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:314
 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:254 [inline]
 tlb_flush_mmu mm/mmu_gather.c:261 [inline]
 tlb_finish_mmu+0x1e0/0x3f0 mm/mmu_gather.c:361
 unmap_region+0x29f/0x2f0 mm/mmap.c:2332
 do_mas_align_munmap+0x947/0x11b0 mm/mmap.c:2582
 do_mas_munmap+0x23e/0x2b0 mm/mmap.c:2640
 __vm_munmap+0x265/0x370 mm/mmap.c:2917
 __do_sys_munmap mm/mmap.c:2942 [inline]
 __se_sys_munmap mm/mmap.c:2939 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:2939
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff888127d98f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888127d99000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888127d99080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff888127d99100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888127d99180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT4-fs error (device loop3): ext4_check_all_de:655: inode #12: block 5: comm syz-executor.3: bad entry in directory: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, size=124 fake=0