CVE-2022-50451

In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: Fix memory leak on ntfs_fill_super() error path

syzbot reported kmemleak as below:

BUG: memory leak

unreferenced object 0xffff8880122f1540 (size 32):

comm "a.out", pid 6664, jiffies 4294939771 (age 25.500s)

hex dump (first 32 bytes):

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

00 00 00 00 00 00 00 00 ed ff ed ff 00 00 00 00 ................

backtrace:

[<ffffffff81b16052>] ntfs_init_fs_context+0x22/0x1c0

[<ffffffff8164aaa7>] alloc_fs_context+0x217/0x430

[<ffffffff81626dd4>] path_mount+0x704/0x1080

[<ffffffff81627e7c>] __x64_sys_mount+0x18c/0x1d0

[<ffffffff84593e14>] do_syscall_64+0x34/0xb0

[<ffffffff84600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

This patch fixes this issue by freeing mount options on error path of

ntfs_fill_super().