potential memory leaks and using null pointer

[Yuan, Qiulin (Qiulin)]

Hi,

When using openssh-7.1p1, the following potential memory leaks or potential using null pointer was found.

in kex.c
line 182, match_list().
line 540, name is not freed.
line 559, name is not freed.
line 582, name is not freed,
line 615, hostkeyalg is not freed.

in packet.c,
line 1950, potential using null pointer ssh.

Regards,

Qiulin Yuan