btrfs: fix uninitialized pointer free on read_alloc_one_name() error

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix uninitialized pointer free on read_alloc_one_name() error The function read_alloc_one_name() does not initialize the name field of the passed fscrypt_str struct if kmalloc fails to allocate the corresponding buffer. Thus, it is not guaranteed that fscrypt_str.name is initialized when freeing it. This is a follow-up to the linked patch that fixes the remaining instances of the bug introduced by commit e43eec81c516 ("btrfs: use struct qstr instead of name and namelen pairs").

References

• https://git.kernel.org/stable/c/b37de9491f140a0ff125c27dd1050185c3accbc1
• https://git.kernel.org/stable/c/7fc7c47b9ba0cf2d192f2117a64b24881b0b577f
• https://git.kernel.org/stable/c/1ec28de5e476913ae51f909660b4447eddb28838
• https://git.kernel.org/stable/c/2ab5e243c2266c841e0f6904fad1514b18eaf510