EXT4-fs warning (device loop3): empty_inline_dir:1865: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
==================================================================
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:1508
Read of size 68 at addr ffff888143156d05 by task syz-executor/8638
CPU: 0 PID: 8638 Comm: syz-executor Not tainted 6.1.90-syzkaller-00122-g7fa70ede91bb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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:1508
ext4_readdir+0x3cd/0x3930 fs/ext4/dir.c:158
iterate_dir+0x265/0x610
__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: 0033:0x7f17afba9333
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:00007ffc9d6356b8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00005555557e0520 RCX: 00007f17afba9333
RDX: 0000000000008000 RSI: 00005555557e0520 RDI: 0000000000000006
RBP: 00005555557e04f4 R08: 00005555557e054b R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8
R13: 0000000000000016 R14: 00005555557e04f0 R15: 00007ffc9d638a50
</TASK>
The buggy address belongs to the physical page:
page:ffffea00050c5580 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x143156
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea00050c54c8 ffffea0005088308 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 10046, tgid 10045 (syz.1.2353), ts 515074528938, free_ts 515585607732
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+0x27ea/0x2870 mm/page_alloc.c:4425
__alloc_pages+0x3a1/0x780 mm/page_alloc.c:5714
__folio_alloc+0x15/0x40 mm/page_alloc.c:5746
__folio_alloc_node include/linux/gfp.h:245 [inline]
folio_alloc include/linux/gfp.h:274 [inline]
shmem_alloc_folio mm/shmem.c:1597 [inline]
shmem_alloc_and_acct_folio+0x78c/0xa50 mm/shmem.c:1622
shmem_get_folio_gfp+0x12d4/0x24b0 mm/shmem.c:1951
shmem_fault+0x1f7/0x840 mm/shmem.c:2166
__do_fault mm/memory.c:4335 [inline]
do_read_fault mm/memory.c:4694 [inline]
do_fault+0xc58/0x1bf0 mm/memory.c:4830
handle_pte_fault mm/memory.c:5127 [inline]
__handle_mm_fault mm/memory.c:5269 [inline]
handle_mm_fault+0x189f/0x30e0 mm/memory.c:5409
faultin_page mm/gup.c:1009 [inline]
__get_user_pages+0x377/0xf20 mm/gup.c:1233
populate_vma_page_range mm/gup.c:1590 [inline]
__mm_populate+0x375/0x570 mm/gup.c:1704
mm_populate include/linux/mm.h:3052 [inline]
vm_mmap_pgoff+0x290/0x430 mm/util.c:530
ksys_mmap_pgoff+0xed/0x1e0 mm/mmap.c:1521
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:93 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
__x64_sys_mmap+0x103/0x120 arch/x86/kernel/sys_x86_64.c:86
x64_sys_call+0x67/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:10
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:3498
free_unref_page_list+0xf1/0x7b0 mm/page_alloc.c:3646
release_pages+0xf7f/0xfe0 mm/swap.c:1063
__pagevec_release+0x84/0x100 mm/swap.c:1083
pagevec_release include/linux/pagevec.h:71 [inline]
folio_batch_release include/linux/pagevec.h:135 [inline]
shmem_undo_range+0x5fc/0x1660 mm/shmem.c:951
shmem_truncate_range mm/shmem.c:1067 [inline]
shmem_evict_inode+0x25f/0xa30 mm/shmem.c:1176
evict+0x2a3/0x630 fs/inode.c:666
iput_final fs/inode.c:1791 [inline]
iput+0x642/0x870 fs/inode.c:1817
dentry_unlink_inode+0x34f/0x440 fs/dcache.c:401
__dentry_kill+0x447/0x650 fs/dcache.c:607
dentry_kill+0xc0/0x2a0
dput+0x40/0x80 fs/dcache.c:914
__fput+0x5f0/0x870 fs/file_table.c:328
____fput+0x15/0x20 fs/file_table.c:348
task_work_run+0x24d/0x2e0 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xbd5/0x2b80 kernel/exit.c:875
Memory state around the buggy address:
ffff888143156c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff888143156c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888143156d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff888143156d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff888143156e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT4-fs warning (device loop3): empty_inline_dir:1865: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs warning (device loop3): empty_inline_dir:1865: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60
EXT4-fs (loop3): unmounting filesystem.