==================================================================
BUG: KASAN: use-after-free in ext4_read_inline_data fs/ext4/inline.c:209 [inline]
BUG: KASAN: use-after-free in ext4_convert_inline_data_nolock+0x30c/0xdf0 fs/ext4/inline.c:1187
Read of size 68 at addr ffff8881272cd0cf by task syz-executor.3/516

CPU: 0 PID: 516 Comm: syz-executor.3 Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x188/0x200 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+0x14f/0x190 mm/kasan/report.c:601
 kasan_check_range+0x23c/0x2c0 mm/kasan/generic.c:189
 __asan_memcpy+0x31/0x80 mm/kasan/shadow.c:105
 ext4_read_inline_data fs/ext4/inline.c:209 [inline]
 ext4_convert_inline_data_nolock+0x30c/0xdf0 fs/ext4/inline.c:1187
 ext4_try_add_inline_entry+0x803/0xb60 fs/ext4/inline.c:1313
 ext4_add_entry+0x570/0x25d0 fs/ext4/namei.c:2405
 ext4_mkdir+0x554/0xcf0 fs/ext4/namei.c:3028
 vfs_mkdir+0x300/0x4f0 fs/namei.c:4131
 do_mkdirat+0x21c/0x310 fs/namei.c:4154
 __do_sys_mkdirat fs/namei.c:4169 [inline]
 __se_sys_mkdirat fs/namei.c:4167 [inline]
 __x64_sys_mkdirat+0x8d/0xa0 fs/namei.c:4167
 x64_sys_call+0x2c72/0x2d00 arch/x86/include/generated/asm/syscalls_64.h:259
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x54/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f413ac7b9e7
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:00007f413ba00ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f413ba00f80 RCX: 00007f413ac7b9e7
RDX: 00000000000001ff RSI: 0000000020000580 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000580
R13: 00007f413ba00f40 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7f4132406 pfn:0x1272cd
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea00049cb388 ffffea00049cb308 0000000000000000
raw: 00000007f4132406 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 512, tgid 511 (syz-executor.3), ts 48607397372, free_ts 48611122905
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x234/0x260 mm/page_alloc.c:1468
 prep_new_page mm/page_alloc.c:1476 [inline]
 get_page_from_freelist+0x21eb/0x2270 mm/page_alloc.c:3402
 __alloc_pages_noprof+0x3e6/0x8a0 mm/page_alloc.c:4660
 __folio_alloc_noprof+0x14/0x80 mm/page_alloc.c:4692
 wp_page_copy mm/memory.c:3291 [inline]
 do_wp_page+0xbfa/0x3080 mm/memory.c:3683
 handle_pte_fault mm/memory.c:5396 [inline]
 __handle_mm_fault mm/memory.c:5523 [inline]
 handle_mm_fault+0x1b96/0x2180 mm/memory.c:5688
 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x40e/0x720 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623
page last free pid 512 tgid 511 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1088 [inline]
 free_unref_folios+0x7b9/0x11e0 mm/page_alloc.c:2614
 folios_put_refs+0x500/0x600 mm/swap.c:1024
 free_pages_and_swap_cache+0x536/0x620 mm/swap_state.c:332
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0x435/0x720 mm/mmu_gather.c:373
 tlb_finish_mmu+0xdb/0x200 mm/mmu_gather.c:465
 unmap_region+0x314/0x380 mm/mmap.c:2370
 do_vmi_align_munmap+0xcd7/0x1380 mm/mmap.c:2683
 do_vmi_munmap+0x278/0x300 mm/mmap.c:2759
 __vm_munmap+0x1fa/0x3b0 mm/mmap.c:3038
 __do_sys_munmap mm/mmap.c:3055 [inline]
 __se_sys_munmap mm/mmap.c:3052 [inline]
 __x64_sys_munmap+0x64/0x80 mm/mmap.c:3052
 x64_sys_call+0xcd3/0x2d00 arch/x86/include/generated/asm/syscalls_64.h:12
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x54/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Memory state around the buggy address:
 ffff8881272ccf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881272cd000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881272cd080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff8881272cd100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881272cd180: 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