==================================================================
BUG: KASAN: use-after-free in ext4_read_inline_data fs/ext4/inline.c:210 [inline]
BUG: KASAN: use-after-free in ext4_read_inline_dir+0x48c/0xf60 fs/ext4/inline.c:1512
Read of size 68 at addr ffff888127135d05 by task syz-executor/468

CPU: 1 PID: 468 Comm: syz-executor Not tainted 6.1.118-syzkaller-1166367-gbda0401cd827 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:316 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:427
 kasan_report+0x13c/0x170 mm/kasan/report.c:531
 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_read_inline_dir+0x48c/0xf60 fs/ext4/inline.c:1512
 ext4_readdir+0x3d1/0x3860 fs/ext4/dir.c:158
 iterate_dir+0x265/0x600
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x1c1/0x460 fs/readdir.c:354
 __x64_sys_getdents64+0x7b/0x90 fs/readdir.c:354
 x64_sys_call+0x5ae/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:218
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4159da9333
Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 02 45 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:00007fff909c88d8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 0000555579d5b520 RCX: 00007f4159da9333
RDX: 0000000000008000 RSI: 0000555579d5b520 RDI: 0000000000000006
RBP: 0000555579d5b4f4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8
R13: 0000000000000016 R14: 0000555579d5b4f0 R15: 00007fff909cbc70
 </TASK>

The buggy address belongs to the physical page:
page:ffffea00049c4d40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x127135
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea00049c4d88 ffffea00049c4d08 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 459, tgid 459 (syz-executor), ts 52248367966, free_ts 52326036509
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597
 get_page_from_freelist+0x2f41/0x2fc0 mm/page_alloc.c:4462
 __alloc_pages+0x234/0x610 mm/page_alloc.c:5759
 __folio_alloc+0x15/0x40 mm/page_alloc.c:5791
 __folio_alloc_node include/linux/gfp.h:245 [inline]
 folio_alloc include/linux/gfp.h:274 [inline]
 alloc_page_vma include/linux/gfp.h:283 [inline]
 do_cow_fault mm/memory.c:4747 [inline]
 do_fault+0x4e8/0x1f10 mm/memory.c:4863
 handle_pte_fault mm/memory.c:5157 [inline]
 __handle_mm_fault mm/memory.c:5299 [inline]
 handle_mm_fault+0x189f/0x30e0 mm/memory.c:5439
 do_user_addr_fault arch/x86/mm/fault.c:1323 [inline]
 handle_page_fault arch/x86/mm/fault.c:1466 [inline]
 exc_page_fault+0x3b3/0x6d0 arch/x86/mm/fault.c:1522
 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:608
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1498 [inline]
 free_pcp_prepare mm/page_alloc.c:1572 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3511
 free_unref_page_list+0xf1/0x7b0 mm/page_alloc.c:3659
 release_pages+0xf7f/0xfe0 mm/swap.c:1063
 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:315
 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
 exit_mmap+0x460/0xbe0 mm/mmap.c:3348
 __mmput+0x95/0x310 kernel/fork.c:1299
 mmput+0x56/0x170 kernel/fork.c:1322
 exit_mm kernel/exit.c:568 [inline]
 do_exit+0xb29/0x2b80 kernel/exit.c:864
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1027
 get_signal+0x169d/0x1820 kernel/signal.c:2889
 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x74/0xa0 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87

Memory state around the buggy address:
 ffff888127135c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888127135c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888127135d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888127135d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888127135e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT4-fs error (device loop0): ext4_read_inline_dir:1593: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0
EXT4-fs error (device loop0): ext4_read_inline_dir:1593: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0
EXT4-fs error (device loop0): empty_inline_dir:1877: inode #12: block 5: comm syz-executor: bad entry in directory: rec_len % 4 != 0 - offset=4, inode=1633771873, rec_len=24929, size=60 fake=0
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs error (device loop0): ext4_read_inline_dir:1593: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0
EXT4-fs error (device loop0): ext4_read_inline_dir:1593: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0
EXT4-fs error (device loop0): empty_inline_dir:1877: inode #12: block 5: comm syz-executor: bad entry in directory: rec_len % 4 != 0 - offset=4, inode=1633771873, rec_len=24929, size=60 fake=0
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs error (device loop0): ext4_read_inline_dir:1593: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0
EXT4-fs error (device loop0): ext4_read_inline_dir:1593: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0
EXT4-fs error (device loop0): empty_inline_dir:1877: inode #12: block 5: comm syz-executor: bad entry in directory: rec_len % 4 != 0 - offset=4, inode=1633771873, rec_len=24929, size=60 fake=0
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs warning (device loop0): empty_inline_dir:1884: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs (loop0): unmounting filesystem.