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BUG: KASAN: use-after-free in ntfs_read_locked_inode+0x49dc/0x58b0 fs/ntfs/inode.c:645
Read of size 8 at addr ffff88808e402e46 by task syz-executor208/6894

CPU: 0 PID: 6894 Comm: syz-executor208 Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
 ntfs_read_locked_inode+0x49dc/0x58b0 fs/ntfs/inode.c:645
 ntfs_iget+0x12d/0x180 fs/ntfs/inode.c:177
 load_and_init_mft_mirror fs/ntfs/super.c:1027 [inline]
 load_system_files fs/ntfs/super.c:1772 [inline]
 ntfs_fill_super+0xb30/0x8560 fs/ntfs/super.c:2894
 mount_bdev+0x32e/0x3f0 fs/super.c:1417
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1547
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x1387/0x20a0 fs/namespace.c:3192
 do_mount fs/namespace.c:3205 [inline]
 __do_sys_mount fs/namespace.c:3413 [inline]
 __se_sys_mount fs/namespace.c:3390 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3390
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4494fa
Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d a3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a a3 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffd3c1a4dc8 EFLAGS: 00000287 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd3c1a4e20 RCX: 00000000004494fa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd3c1a4de0
RBP: 00007ffd3c1a4de0 R08: 00007ffd3c1a4e20 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000287 R12: 00000000000000ab
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003

Allocated by task 6875:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
 __do_kmalloc mm/slab.c:3659 [inline]
 __kmalloc+0x1b0/0x360 mm/slab.c:3668
 kmalloc include/linux/slab.h:559 [inline]
 tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path2_perm+0x264/0x6b0 security/tomoyo/file.c:922
 tomoyo_path_rename+0xd2/0x130 security/tomoyo/tomoyo.c:279
 security_path_rename+0x1b5/0x2e0 security/security.c:1135
 do_renameat2+0x481/0xbf0 fs/namei.c:4452
 __do_sys_rename fs/namei.c:4502 [inline]
 __se_sys_rename fs/namei.c:4500 [inline]
 __x64_sys_rename+0x5d/0x80 fs/namei.c:4500
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 6875:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56
 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355
 __kasan_slab_free+0xd8/0x120 mm/kasan/common.c:422
 __cache_free mm/slab.c:3422 [inline]
 kfree+0x10e/0x2b0 mm/slab.c:3760
 tomoyo_realpath_from_path+0x191/0x620 security/tomoyo/realpath.c:291
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path2_perm+0x264/0x6b0 security/tomoyo/file.c:922
 tomoyo_path_rename+0xd2/0x130 security/tomoyo/tomoyo.c:279
 security_path_rename+0x1b5/0x2e0 security/security.c:1135
 do_renameat2+0x481/0xbf0 fs/namei.c:4452
 __do_sys_rename fs/namei.c:4502 [inline]
 __se_sys_rename fs/namei.c:4500 [inline]
 __x64_sys_rename+0x5d/0x80 fs/namei.c:4500
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff88808e402000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3654 bytes inside of
 4096-byte region [ffff88808e402000, ffff88808e403000)
The buggy address belongs to the page:
page:00000000ec636ae4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8e402
head:00000000ec636ae4 order:1 compound_mapcount:0
flags: 0xfffe0000010200(slab|head)
raw: 00fffe0000010200 ffffea00024bfe08 ffffea000242b508 ffff8880aa040900
raw: 0000000000000000 ffff88808e402000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808e402d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808e402d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88808e402e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff88808e402e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808e402f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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