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BUG: KASAN: slab-out-of-bounds in hdr_find_e+0x255/0x580 fs/ntfs3/index.c:689
Read of size 2 at addr ffff88803ed39820 by task syz-executor.0/23086

CPU: 0 PID: 23086 Comm: syz-executor.0 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 print_address_description+0x65/0x4b0 mm/kasan/report.c:317
 print_report+0x108/0x1f0 mm/kasan/report.c:433
 kasan_report+0xc3/0xf0 mm/kasan/report.c:495
 hdr_find_e+0x255/0x580 fs/ntfs3/index.c:689
 indx_find+0x4ff/0xb20 fs/ntfs3/index.c:1085
 dir_search_u+0x161/0x320 fs/ntfs3/dir.c:254
 ntfs_lookup+0x112/0x1b0 fs/ntfs3/namei.c:83
 lookup_open fs/namei.c:3391 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x10e6/0x2df0 fs/namei.c:3688
 do_filp_open+0x264/0x4f0 fs/namei.c:3718
 do_sys_openat2+0x124/0x4e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3ef888b5a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f3ef9957168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f3ef89abf80 RCX: 00007f3ef888b5a9
RDX: 0000000000084180 RSI: 0000000020000140 RDI: ffffffffffffff9c
RBP: 00007f3ef88e6580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffec4bf283f R14: 00007f3ef9957300 R15: 0000000000022000
 </TASK>

Allocated by task 16444:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc+0xcd/0x100 mm/kasan/common.c:516
 kasan_kmalloc include/linux/kasan.h:234 [inline]
 __kmalloc+0x226/0x370 mm/slub.c:4429
 kmalloc include/linux/slab.h:605 [inline]
 tomoyo_realpath_from_path+0xcd/0x5f0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x227/0x670 security/tomoyo/file.c:822
 security_inode_getattr+0xc0/0x140 security/security.c:1347
 vfs_getattr fs/stat.c:158 [inline]
 vfs_statx+0x188/0x4a0 fs/stat.c:233
 vfs_fstatat fs/stat.c:267 [inline]
 __do_sys_newfstatat fs/stat.c:437 [inline]
 __se_sys_newfstatat+0xed/0x7d0 fs/stat.c:431
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 16444:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x3d/0x60 mm/kasan/common.c:45
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:367
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1759 [inline]
 slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1785
 slab_free mm/slub.c:3539 [inline]
 kfree+0xda/0x210 mm/slub.c:4567
 tomoyo_realpath_from_path+0x5b9/0x5f0 security/tomoyo/realpath.c:286
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x227/0x670 security/tomoyo/file.c:822
 security_inode_getattr+0xc0/0x140 security/security.c:1347
 vfs_getattr fs/stat.c:158 [inline]
 vfs_statx+0x188/0x4a0 fs/stat.c:233
 vfs_fstatat fs/stat.c:267 [inline]
 __do_sys_newfstatat fs/stat.c:437 [inline]
 __se_sys_newfstatat+0xed/0x7d0 fs/stat.c:431
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88803ed38000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 2080 bytes to the right of
 4096-byte region [ffff88803ed38000, ffff88803ed39000)

The buggy address belongs to the physical page:
page:ffffea0000fb4e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3ed38
head:ffffea0000fb4e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888012042140
raw: 0000000000000000 0000000000040004 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 21218, tgid 21214 (syz-executor.1), ts 772390561867, free_ts 763550858793
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549
 alloc_slab_page+0x70/0xf0 mm/slub.c:1829
 allocate_slab+0x5e/0x520 mm/slub.c:1974
 new_slab mm/slub.c:2034 [inline]
 ___slab_alloc+0x3ee/0xc40 mm/slub.c:3036
 __slab_alloc mm/slub.c:3123 [inline]
 slab_alloc_node mm/slub.c:3214 [inline]
 slab_alloc mm/slub.c:3256 [inline]
 kmem_cache_alloc_trace+0x25f/0x310 mm/slub.c:3287
 kmalloc include/linux/slab.h:600 [inline]
 copy_mount_options fs/namespace.c:3248 [inline]
 __do_sys_mount fs/namespace.c:3586 [inline]
 __se_sys_mount+0x156/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1449 [inline]
 free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499
 free_unref_page_prepare mm/page_alloc.c:3380 [inline]
 free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3476
 free_slab mm/slub.c:2073 [inline]
 discard_slab mm/slub.c:2079 [inline]
 __unfreeze_partials+0x1ab/0x200 mm/slub.c:2553
 put_cpu_partial+0x106/0x170 mm/slub.c:2629
 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:447
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:727 [inline]
 slab_alloc_node mm/slub.c:3248 [inline]
 slab_alloc mm/slub.c:3256 [inline]
 __kmalloc+0x1bd/0x370 mm/slub.c:4425
 kmalloc include/linux/slab.h:605 [inline]
 tomoyo_realpath_from_path+0xcd/0x5f0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x227/0x670 security/tomoyo/file.c:822
 security_path_truncate+0xc0/0x140 security/security.c:1212
 handle_truncate fs/namei.c:3214 [inline]
 do_open fs/namei.c:3561 [inline]
 path_openat+0x271c/0x2df0 fs/namei.c:3691
 do_filp_open+0x264/0x4f0 fs/namei.c:3718
 do_sys_openat2+0x124/0x4e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80

Memory state around the buggy address:
 ffff88803ed39700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803ed39780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803ed39800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff88803ed39880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803ed39900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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