memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5009 'syz-executor107'
loop0: detected capacity change from 0 to 4096
ntfs3: loop0: Different NTFS sector size (2048) and media sector size (512).
ntfs3: loop0: NTFS 0.00 Gb is too big to use 32 bits per cluster.
==================================================================
BUG: KASAN: use-after-free in memcmp lib/string.c:681 [inline]
BUG: KASAN: use-after-free in bcmp+0xc0/0x1e0 lib/string.c:713
Read of size 8 at addr ffff888073f08002 by task syz-executor107/5009

CPU: 0 PID: 5009 Comm: syz-executor107 Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x163/0x540 mm/kasan/report.c:475
 kasan_report+0x175/0x1b0 mm/kasan/report.c:588
 memcmp lib/string.c:681 [inline]
 bcmp+0xc0/0x1e0 lib/string.c:713
 ntfs_init_from_boot fs/ntfs3/super.c:860 [inline]
 ntfs_fill_super+0x9e6/0x4cb0 fs/ntfs3/super.c:1141
 get_tree_bdev+0x468/0x6c0 fs/super.c:1318
 vfs_get_tree+0x8c/0x270 fs/super.c:1519
 do_new_mount+0x28f/0xae0 fs/namespace.c:3335
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f836cebebba
Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcc88b5f28 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f836cebebba
RDX: 0000000020000180 RSI: 0000000020000040 RDI: 00007ffcc88b5f40
RBP: 00007ffcc88b5f40 R08: 00007ffcc88b5f80 R09: 000000000001f3ed
R10: 0000000001000018 R11: 0000000000000286 R12: 0000000000000004
R13: 0000555555e9d2c0 R14: 0000000001000018 R15: 00007ffcc88b5f80
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0001cfc200 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x73f08
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 ffffea0001cfc248 ffff8880b9843020 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 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 5009, tgid 5009 (syz-executor107), ts 63762816444, free_ts 63789884508
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1570
 prep_new_page mm/page_alloc.c:1577 [inline]
 get_page_from_freelist+0x31e8/0x3370 mm/page_alloc.c:3221
 __alloc_pages+0x255/0x670 mm/page_alloc.c:4477
 __folio_alloc+0x13/0x30 mm/page_alloc.c:4509
 vma_alloc_folio+0x48a/0x9a0 mm/mempolicy.c:2240
 do_anonymous_page mm/memory.c:4104 [inline]
 do_pte_missing mm/memory.c:3662 [inline]
 handle_pte_fault mm/memory.c:4939 [inline]
 __handle_mm_fault mm/memory.c:5079 [inline]
 handle_mm_fault+0x20c7/0x5410 mm/memory.c:5233
 do_user_addr_fault arch/x86/mm/fault.c:1343 [inline]
 handle_page_fault arch/x86/mm/fault.c:1486 [inline]
 exc_page_fault+0x3cf/0x7c0 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+0x903/0xa30 mm/page_alloc.c:2348
 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2489
 release_pages+0x2193/0x2470 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+0x100/0x210 mm/mmu_gather.c:299
 tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:391
 unmap_region+0x258/0x2a0 mm/mmap.c:2317
 do_vmi_align_munmap+0x135d/0x1630 mm/mmap.c:2556
 do_vmi_munmap+0x24d/0x2d0 mm/mmap.c:2623
 __vm_munmap+0x230/0x450 mm/mmap.c:2905
 __do_sys_munmap mm/mmap.c:2922 [inline]
 __se_sys_munmap mm/mmap.c:2919 [inline]
 __x64_sys_munmap+0x69/0x80 mm/mmap.c:2919
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff888073f07f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888073f07f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888073f08000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888073f08080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888073f08100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================