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curl_sasl: Fixed potential null pointer utilisation

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Although this should never happen due to the relationship between the
'mech' and 'resp' variables, and the way they are allocated together,
it does cause problems for code analysis tools:

V595 The 'mech' pointer was utilized before it was verified against
     nullptr. Check lines: 376, 381. curl_sasl.c 376

Bug: https://github.com/curl/curl/issues/745
Reported-by: Alexis La Goutte
This commit is contained in:
Steve Holme 2016-04-03 17:55:17 +01:00
parent 7a7cdf264d
commit e655ae0c80
1 changed files with 5 additions and 7 deletions
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12
lib/curl_sasl.c
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@ -373,19 +373,17 @@ CURLcode Curl_sasl_start(struct SASL *sasl, struct connectdata *conn,
}
}
if(!result) {
if(!result && mech) {
if(resp && sasl->params->maxirlen &&
strlen(mech) + len > sasl->params->maxirlen) {
free(resp);
resp = NULL;
}
if(mech) {
result = sasl->params->sendauth(conn, mech, resp);
if(!result) {
*progress = SASL_INPROGRESS;
state(sasl, conn, resp? state2: state1);
}
result = sasl->params->sendauth(conn, mech, resp);
if(!result) {
*progress = SASL_INPROGRESS;
state(sasl, conn, resp ? state2 : state1);
}
}