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Prevent possible double free of hostkey (#1452)

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NULL server hostkey based on fuzzer failure case.
This commit is contained in:
Will Cosgrove
2024-09-10 09:35:26 -07:00
committed by GitHub
parent 9d9ee7807d
commit b346541847
1 changed files with 4 additions and 1 deletions
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5
src/kex.c
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@@ -469,8 +469,11 @@ static int diffie_hellman_sha_algo(LIBSSH2_SESSION *session,
buf.dataptr = buf.data; buf.dataptr = buf.data;
buf.dataptr++; /* advance past type */ buf.dataptr++; /* advance past type */
if(session->server_hostkey) if(session->server_hostkey) {
LIBSSH2_FREE(session, session->server_hostkey); LIBSSH2_FREE(session, session->server_hostkey);
session->server_hostkey = NULL;
session->server_hostkey_len = 0;
}
if(_libssh2_copy_string(session, &buf, &(session->server_hostkey), if(_libssh2_copy_string(session, &buf, &(session->server_hostkey),
&host_key_len)) { &host_key_len)) {