EXT4-fs warning (device loop0): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
==================================================================
BUG: KASAN: use-after-free in ext4_read_inline_data fs/ext4/inline.c:209 [inline]
BUG: KASAN: use-after-free in ext4_read_inline_dir+0x448/0xdb0 fs/ext4/inline.c:1533
Read of size 68 at addr ffff888121d166d3 by task syz-executor/474

CPU: 1 PID: 474 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 memcpy+0x2d/0x70 mm/kasan/shadow.c:65
 ext4_read_inline_data fs/ext4/inline.c:209 [inline]
 ext4_read_inline_dir+0x448/0xdb0 fs/ext4/inline.c:1533
 ext4_readdir+0x39b/0x3ab0 fs/ext4/dir.c:161
 iterate_dir+0x260/0x570 fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0xf2/0x250 fs/readdir.c:354
 __x64_sys_getdents64+0x7b/0x90 fs/readdir.c:354
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fc65db8aab3
Code: c7 c0 e8 ff ff ff 64 c7 00 16 00 00 00 31 c0 eb 9e e8 81 9b fd ff 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 e8 ff ff ff f7 d8
RSP: 002b:00007fff76faa418 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000055558d0e3950 RCX: 00007fc65db8aab3
RDX: 0000000000008000 RSI: 000055558d0e3980 RDI: 0000000000000006
RBP: 000055558d0e3980 R08: 00007fc65dd67ca0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 000055558d0e3954
R13: ffffffffffffffe8 R14: 0000000000000016 R15: 00007fff76fad7b0

The buggy address belongs to the page:
page:ffffea0004874580 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x121d16
flags: 0x4000000000000000()
raw: 4000000000000000 ffffea0004874808 ffffea00048d2f08 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 0x8100dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|0x8000000), pid 427, ts 47797016307, free_ts 47797610728
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x223b/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x290/0x620 mm/page_alloc.c:5370
 __alloc_pages include/linux/gfp.h:544 [inline]
 __alloc_pages_node include/linux/gfp.h:557 [inline]
 alloc_pages_node include/linux/gfp.h:571 [inline]
 alloc_pages include/linux/gfp.h:590 [inline]
 do_anonymous_page mm/memory.c:3963 [inline]
 handle_pte_fault+0x1719/0x3750 mm/memory.c:4786
 __handle_mm_fault mm/memory.c:4944 [inline]
 handle_mm_fault+0xf81/0x1710 mm/memory.c:5358
 do_user_addr_fault+0x5a8/0xc90 arch/x86/mm/fault.c:1362
 handle_page_fault arch/x86/mm/fault.c:1428 [inline]
 exc_page_fault+0x5a/0xc0 arch/x86/mm/fault.c:1484
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2b7/0x2d0 mm/page_alloc.c:3336
 free_unref_page_list+0x129/0x9c0 mm/page_alloc.c:3443
 release_pages+0xe52/0xea0 mm/swap.c:1103
 free_pages_and_swap_cache+0x86/0xa0 mm/swap_state.c:356
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:240 [inline]
 tlb_flush_mmu mm/mmu_gather.c:247 [inline]
 tlb_finish_mmu+0x17e/0x310 mm/mmu_gather.c:326
 unmap_region+0x355/0x3c0 mm/mmap.c:2811
 __do_munmap+0x63c/0x850 mm/mmap.c:3041
 __vm_munmap mm/mmap.c:3094 [inline]
 __do_sys_munmap mm/mmap.c:3120 [inline]
 __se_sys_munmap+0x130/0x1c0 mm/mmap.c:3116
 __x64_sys_munmap+0x5b/0x70 mm/mmap.c:3116
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Memory state around the buggy address:
 ffff888121d16580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888121d16600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888121d16680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                 ^
 ffff888121d16700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888121d16780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT4-fs warning (device loop0): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60