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Fix possible null deref in pub #848

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Fix possible null deref in pub #848

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6 changes: 4 additions & 2 deletions src/pub.c
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Original file line number Diff line number Diff line change
Expand Up @@ -279,10 +279,12 @@ natsConnection_PublishString(natsConnection *nc, const char *subj,
natsStatus
natsConnection_PublishMsg(natsConnection *nc, natsMsg *msg)
{
const char *reply = (msg != NULL ? msg->reply : NULL);
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We need to rewrite this function and if msg == NULL return an invalid arg. The check of nc is done in the lower function, but could easily be added into this one.

As for removing the reply subject, of course we need it, but yes, the called function will take it from the provided message structure if not provided as a parameter, so I guess this change is ok.

natsStatus s;

s = _publishMsg(nc, msg, reply);
if (nc == NULL || msg == NULL)
return nats_setDefaultError(NATS_INVALID_ARG);

s = _publishMsg(nc, msg, NULL);
return NATS_UPDATE_ERR_STACK(s);
}

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