ntfs: (device loop0): map_mft_record_page(): Attempt to read mft record 0x10000, which is beyond the end of the mft. This is probably a bug in the ntfs driver. ntfs: (device loop0): map_mft_record(): Failed with error code 2. ================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_filldir fs/ntfs/dir.c:1034 [inline] BUG: KASAN: slab-out-of-bounds in ntfs_readdir+0x3ad2/0x4140 fs/ntfs/dir.c:1213 Read of size 1 at addr ffff8880a8e7eb71 by task syz-executor136/8089 CPU: 1 PID: 8089 Comm: syz-executor136 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430 ntfs_filldir fs/ntfs/dir.c:1034 [inline] ntfs_readdir+0x3ad2/0x4140 fs/ntfs/dir.c:1213 iterate_dir+0x1fe/0x5c0 fs/readdir.c:53 ksys_getdents64+0x175/0x2b0 fs/readdir.c:357 __do_sys_getdents64 fs/readdir.c:376 [inline] __se_sys_getdents64 fs/readdir.c:373 [inline] __x64_sys_getdents64+0x6f/0xb0 fs/readdir.c:373 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5a3bc00789 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdef08f8f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5a3bc00789 RDX: 0000000000000098 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f5a3bbc0020 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001e706 R11: 0000000000000246 R12: 00007f5a3bbc00b0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 8089: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] ntfs_readdir+0x3d3/0x4140 fs/ntfs/dir.c:1175 iterate_dir+0x1fe/0x5c0 fs/readdir.c:53 ksys_getdents64+0x175/0x2b0 fs/readdir.c:357 __do_sys_getdents64 fs/readdir.c:376 [inline] __se_sys_getdents64 fs/readdir.c:373 [inline] __x64_sys_getdents64+0x6f/0xb0 fs/readdir.c:373 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 4699: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 __d_free_external+0x3f/0x60 fs/dcache.c:276 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2584 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0x8ff/0x18b0 kernel/rcu/tree.c:2881 __do_softirq+0x265/0x980 kernel/softirq.c:292 The buggy address belongs to the object at ffff8880a8e7eb00 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 49 bytes to the right of 64-byte region [ffff8880a8e7eb00, ffff8880a8e7eb40) The buggy address belongs to the page: page:ffffea0002a39f80 count:1 mapcount:0 mapping:ffff88813bff0340 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002a7f788 ffffea0002a68748 ffff88813bff0340 raw: 0000000000000000 ffff8880a8e7e000 0000000100000020 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a8e7ea00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff8880a8e7ea80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880a8e7eb00: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ^ ffff8880a8e7eb80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff8880a8e7ec00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================