loop0: detected capacity change from 0 to 264192
ntfs3: loop0: Unrecognized mount option "iocharset=cp950" or missing value
ntfs3: loop0: Different NTFS' sector size and media sector size
ntfs3: loop0: Mark volume as dirty due to NTFS errors
==================================================================
BUG: KASAN: use-after-free in memcmp+0xa6/0xb0 lib/string.c:939
Read of size 1 at addr ffff88802bcf8f40 by task syz-executor.0/5949

CPU: 0 PID: 5949 Comm: syz-executor.0 Not tainted 5.14.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x57/0x7d lib/dump_stack.c:105
 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:436
 memcmp+0xa6/0xb0 lib/string.c:939
 memcmp include/linux/fortify-string.h:235 [inline]
 ntfs_read_mft fs/ntfs3/inode.c:261 [inline]
 ntfs_iget5+0x15f1/0x2fa0 fs/ntfs3/inode.c:501
 ntfs_fill_super+0x2c43/0x3550 fs/ntfs3/super.c:1311
 mount_bdev+0x2cb/0x3b0 fs/super.c:1368
 legacy_get_tree+0xfa/0x1f0 fs/fs_context.c:610
 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498
 do_new_mount fs/namespace.c:2905 [inline]
 path_mount+0x7f3/0x1a40 fs/namespace.c:3235
 do_mount fs/namespace.c:3248 [inline]
 __do_sys_mount fs/namespace.c:3456 [inline]
 __se_sys_mount fs/namespace.c:3433 [inline]
 __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3433
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f354eb0fb9a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f354e281f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f354eb0fb9a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f354e281fe0
RBP: 00007f354e282020 R08: 00007f354e282020 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f354e281fe0 R15: 0000000020000140

Allocated by task 5954:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 __kasan_slab_alloc+0x84/0xa0 mm/kasan/common.c:467
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook mm/slab.h:519 [inline]
 slab_alloc_node mm/slub.c:2956 [inline]
 slab_alloc mm/slub.c:2964 [inline]
 kmem_cache_alloc+0x285/0x4a0 mm/slub.c:2969
 getname_flags.part.0+0x4a/0x440 fs/namei.c:138
 do_sys_openat2+0xd2/0x360 fs/open.c:1198
 do_sys_open fs/open.c:1220 [inline]
 __do_sys_openat fs/open.c:1236 [inline]
 __se_sys_openat fs/open.c:1231 [inline]
 __x64_sys_openat+0x11b/0x1d0 fs/open.c:1231
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 5954:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free mm/kasan/common.c:328 [inline]
 __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:374
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1625 [inline]
 slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1650
 slab_free mm/slub.c:3210 [inline]
 kmem_cache_free+0x8a/0x5b0 mm/slub.c:3226
 do_sys_openat2+0x106/0x360 fs/open.c:1213
 do_sys_open fs/open.c:1220 [inline]
 __do_sys_openat fs/open.c:1236 [inline]
 __se_sys_openat fs/open.c:1231 [inline]
 __x64_sys_openat+0x11b/0x1d0 fs/open.c:1231
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff88802bcf8000
 which belongs to the cache names_cache of size 4096
The buggy address is located 3904 bytes inside of
 4096-byte region [ffff88802bcf8000, ffff88802bcf9000)
The buggy address belongs to the page:
page:ffffea0000af3e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2bcf8
head:ffffea0000af3e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff8880105ca3c0
raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4823, ts 14101249310, free_ts 14096699328
 prep_new_page mm/page_alloc.c:2436 [inline]
 get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4169
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5391
 alloc_slab_page mm/slub.c:1688 [inline]
 allocate_slab+0x32e/0x4b0 mm/slub.c:1828
 new_slab mm/slub.c:1891 [inline]
 new_slab_objects mm/slub.c:2637 [inline]
 ___slab_alloc+0x4ba/0x820 mm/slub.c:2800
 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2840
 slab_alloc_node mm/slub.c:2922 [inline]
 slab_alloc mm/slub.c:2964 [inline]
 kmem_cache_alloc+0x3e1/0x4a0 mm/slub.c:2969
 getname_flags.part.0+0x4a/0x440 fs/namei.c:138
 do_sys_openat2+0xd2/0x360 fs/open.c:1198
 do_sys_open fs/open.c:1220 [inline]
 __do_sys_openat fs/open.c:1236 [inline]
 __se_sys_openat fs/open.c:1231 [inline]
 __x64_sys_openat+0x11b/0x1d0 fs/open.c:1231
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1346 [inline]
 free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1397
 free_unref_page_prepare mm/page_alloc.c:3332 [inline]
 free_unref_page+0x19/0x690 mm/page_alloc.c:3411
 unfreeze_partials+0x17c/0x1d0 mm/slub.c:2418
 put_cpu_partial+0x13d/0x230 mm/slub.c:2454
 qlink_free mm/kasan/quarantine.c:146 [inline]
 qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 __kasan_slab_alloc+0x8e/0xa0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook mm/slab.h:519 [inline]
 slab_alloc_node mm/slub.c:2956 [inline]
 slab_alloc mm/slub.c:2964 [inline]
 __kmalloc+0x1f4/0x330 mm/slub.c:4108
 kmalloc include/linux/slab.h:596 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 tomoyo_encode2.part.0+0x92/0x310 security/tomoyo/realpath.c:45
 tomoyo_realpath_from_path+0x140/0x6a0 security/tomoyo/realpath.c:288
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x21c/0x2c0 security/tomoyo/file.c:771
 security_file_open+0x43/0x410 security/security.c:1633
 do_dentry_open+0x30d/0xfc0 fs/open.c:813
 do_open fs/namei.c:3374 [inline]
 path_openat+0x9fa/0x22f0 fs/namei.c:3507
 do_filp_open+0x199/0x3d0 fs/namei.c:3534
 do_sys_openat2+0x11e/0x360 fs/open.c:1204

Memory state around the buggy address:
 ffff88802bcf8e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802bcf8e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802bcf8f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff88802bcf8f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802bcf9000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================