EXT4-fs error (device loop0): htree_dirblock_to_tree:1109: inode #2: block 21: comm syz-executor: bad entry in directory: directory entry overrun - offset=1004, inode=0, rec_len=1000, size=1024 fake=0
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BUG: KASAN: use-after-free in ext4_read_inline_data fs/ext4/inline.c:209 [inline]
BUG: KASAN: use-after-free in ext4_inlinedir_to_tree+0x47d/0xf60 fs/ext4/inline.c:1366
Read of size 324 at addr ffff8881270d2c05 by task syz-executor/1876

CPU: 1 PID: 1876 Comm: syz-executor Not tainted 6.5.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xf8/0x260 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x167/0x540 mm/kasan/report.c:475
 kasan_report+0x175/0x1b0 mm/kasan/report.c:588
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:187
 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105
 ext4_read_inline_data fs/ext4/inline.c:209 [inline]
 ext4_inlinedir_to_tree+0x47d/0xf60 fs/ext4/inline.c:1366
 ext4_htree_fill_tree+0x4de/0x1240 fs/ext4/namei.c:1208
 ext4_dx_readdir fs/ext4/dir.c:597 [inline]
 ext4_readdir+0x234c/0x2e30 fs/ext4/dir.c:142
 iterate_dir+0x1f0/0x500
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x1b3/0x3e0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x46/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x6f/0xd9
RIP: 0033:0x7f6615173013
Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 52 43 f8 ff 66 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 a8 ff ff ff f7 d8
RSP: 002b:00007fff52f1f678 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00005555569ac520 RCX: 00007f6615173013
RDX: 0000000000008000 RSI: 00005555569ac520 RDI: 0000000000000006
RBP: 00005555569ac4f4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8
R13: 0000000000000016 R14: 00005555569ac4f0 R15: 00007fff52f22a10
 </TASK>

The buggy address belongs to the physical page:
page:ffffea00049c3480 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x1270d2
flags: 0x200000000000000(node=0|zone=2)
page_type: 0xffffffff()
raw: 0200000000000000 dead000000000100 dead000000000122 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 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 2158, tgid 2158 (modprobe), ts 62124616185, free_ts 62127053497
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x10f/0x130 mm/page_alloc.c:1570
 prep_new_page mm/page_alloc.c:1577 [inline]
 get_page_from_freelist+0x332d/0x35a0 mm/page_alloc.c:3221
 __alloc_pages+0x255/0x650 mm/page_alloc.c:4477
 vma_alloc_folio+0x696/0x880 mm/mempolicy.c:2240
 wp_page_copy mm/memory.c:3085 [inline]
 do_wp_page+0xa0f/0x2420 mm/memory.c:3446
 handle_pte_fault mm/memory.c:4955 [inline]
 __handle_mm_fault mm/memory.c:5079 [inline]
 handle_mm_fault+0x99f/0x29f0 mm/memory.c:5233
 do_user_addr_fault arch/x86/mm/fault.c:1392 [inline]
 handle_page_fault arch/x86/mm/fault.c:1486 [inline]
 exc_page_fault+0x264/0x760 arch/x86/mm/fault.c:1542
 asm_exc_page_fault+0x26/0x30 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:1161 [inline]
 free_unref_page_prepare+0x807/0x930 mm/page_alloc.c:2348
 free_unref_page_list+0xb3/0x630 mm/page_alloc.c:2489
 release_pages+0x16b0/0x1860 mm/swap.c:1042
 tlb_batch_pages_flush mm/mmu_gather.c:97 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline]
 tlb_flush_mmu+0x273/0x3d0 mm/mmu_gather.c:299
 tlb_finish_mmu+0xb6/0x1c0 mm/mmu_gather.c:391
 exit_mmap+0x345/0x830 mm/mmap.c:3214
 __mmput+0x61/0x290 kernel/fork.c:1348
 exit_mm+0x113/0x1b0 kernel/exit.c:567
 do_exit+0x7c7/0x2350 kernel/exit.c:861
 do_group_exit+0x1b9/0x280 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x46/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x6f/0xd9

Memory state around the buggy address:
 ffff8881270d2b00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881270d2b80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881270d2c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8881270d2c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881270d2d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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