In the Linux kernel, the following vulnerability has been resolved:
nvmet-auth: zero the AUTH_RECEIVE response buffer
nvmet_execute_auth_receive() allocates the response buffer with kmalloc()
sized by the host-supplied AUTH_RECEIVE allocation length, but the
DH-HMAC-CHAP builders write only a fixed-size message into it. The full
allocation length is then copied to the wire by nvmet_copy_to_sgl(), so a
remote initiator receives the bytes past the built message — up to nearly
a page of uninitialized slab — during the pre-authentication handshake.
Allocate the buffer with kzalloc() so the unwritten tail is zeroed before
it is sent; conforming responses are unaffected.
