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gssapi: add null checks for session->gssapi before using it

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These are not strictly necessary because we always check
that we performed GSSAPI KEX, but they won't hurt us.

Signed-off-by: Pavol Žáčik <pzacik@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Pavol Žáčik
2025-12-18 19:36:42 +01:00
committed by Jakub Jelen
parent 06eea93ded
commit e04d753ace
4 changed files with 21 additions and 0 deletions
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5
src/packet_cb.c
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@@ -182,6 +182,11 @@ SSH_PACKET_CALLBACK(ssh_packet_newkeys)
OM_uint32 maj_stat, min_stat;
gss_buffer_desc mic = GSS_C_EMPTY_BUFFER, msg = GSS_C_EMPTY_BUFFER;
if (session->gssapi == NULL || session->gssapi->ctx == NULL) {
ssh_set_error(session, SSH_FATAL, "GSSAPI context not initialized");
goto error;
}
mic.length = ssh_string_len(session->gssapi_key_exchange_mic);
mic.value = ssh_string_data(session->gssapi_key_exchange_mic);