==================================================================
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+0x319/0xd80 fs/ext4/inline.c:1224
Read of size 68 at addr ffff8881d79cd0cf by task syz-executor.0/529

CPU: 1 PID: 529 Comm: syz-executor.0 Not tainted 5.4.268-syzkaller-04882-g51cf29fc2bfc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x600 mm/kasan/report.c:384
 __kasan_report+0xf3/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 check_memory_region_inline mm/kasan/generic.c:141 [inline]
 check_memory_region+0x272/0x280 mm/kasan/generic.c:191
 memcpy+0x25/0x50 mm/kasan/common.c:123
 ext4_read_inline_data fs/ext4/inline.c:209 [inline]
 ext4_convert_inline_data_nolock+0x319/0xd80 fs/ext4/inline.c:1224
 ext4_try_add_inline_entry+0x7ff/0xb20 fs/ext4/inline.c:1349
 ext4_add_entry+0x6c2/0x1240 fs/ext4/namei.c:2352
 ext4_mkdir+0xc9f/0x1520 fs/ext4/namei.c:2942
 vfs_mkdir+0x41f/0x600 fs/namei.c:3916
 do_mkdirat+0x1a9/0x2c0 fs/namei.c:3939
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

The buggy address belongs to the page:
page:ffffea00075e7340 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1
flags: 0x8000000000000000()
raw: 8000000000000000 ffffea00075e7388 ffffea00075e7308 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 0x1100dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|0x1000000)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4891
 __alloc_pages include/linux/gfp.h:503 [inline]
 __alloc_pages_node include/linux/gfp.h:516 [inline]
 alloc_pages_node include/linux/gfp.h:530 [inline]
 alloc_zeroed_user_highpage_movable include/linux/highmem.h:211 [inline]
 wp_page_copy+0x20f/0x1820 mm/memory.c:2461
 handle_pte_fault mm/memory.c:4044 [inline]
 __handle_mm_fault mm/memory.c:4152 [inline]
 handle_mm_fault+0x18cc/0x4990 mm/memory.c:4189
 do_user_addr_fault arch/x86/mm/fault.c:1469 [inline]
 __do_page_fault+0x509/0xbb0 arch/x86/mm/fault.c:1530
 page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1206
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 free_pcp_prepare mm/page_alloc.c:1233 [inline]
 free_unref_page_prepare+0x297/0x380 mm/page_alloc.c:3085
 free_unref_page_list+0x10a/0x590 mm/page_alloc.c:3154
 release_pages+0xad8/0xb20 mm/swap.c:842
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:189 [inline]
 tlb_flush_mmu mm/mmu_gather.c:196 [inline]
 tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:277
 unmap_region+0x31c/0x370 mm/mmap.c:2644
 __do_munmap+0x649/0x850 mm/mmap.c:2875
 __vm_munmap mm/mmap.c:2898 [inline]
 __do_sys_munmap mm/mmap.c:2924 [inline]
 __se_sys_munmap+0x11d/0x1a0 mm/mmap.c:2920
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Memory state around the buggy address:
 ffff8881d79ccf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881d79cd000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881d79cd080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff8881d79cd100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881d79cd180: 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:657: inode #12: block 5: comm syz-executor.0: bad entry in directory: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, size=124 fake=0