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Guard against array overrun, per report from Yichen Xie. This case

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can only occur if the constant DEFAULT_CLIENT_AUTHSVC is given a bogus
value, so it doesn't seem worth back-patching, but I'll fix it in HEAD.
This commit is contained in:
Tom Lane 2003-01-29 01:18:21 +00:00
parent 23b8a0ce61
commit 3cb282f3e6
1 changed files with 12 additions and 1 deletions
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13
src/interfaces/libpq/fe-auth.c
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@ -10,7 +10,7 @@
* exceed INITIAL_EXPBUFFER_SIZE (currently 256 bytes).
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-auth.c,v 1.72 2002/12/03 22:09:20 momjian Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-auth.c,v 1.73 2003/01/29 01:18:21 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -686,7 +686,14 @@ MsgType
fe_getauthsvc(char *PQerrormsg)
{
if (pg_authsvc < 0 || pg_authsvc >= n_authsvcs)
{
fe_setauthsvc(DEFAULT_CLIENT_AUTHSVC, PQerrormsg);
if (pg_authsvc < 0 || pg_authsvc >= n_authsvcs)
{
/* Can only get here if DEFAULT_CLIENT_AUTHSVC is misdefined */
return 0;
}
}
return authsvcs[pg_authsvc].msgtype;
}
@ -704,6 +711,10 @@ fe_getauthname(char *PQerrormsg)
authsvc = fe_getauthsvc(PQerrormsg);
/* this just guards against broken DEFAULT_CLIENT_AUTHSVC, see above */
if (authsvc == 0)
return NULL; /* leave original error message in place */
#ifdef KRB4
if (authsvc == STARTUP_KRB4_MSG)
name = pg_krb4_authname(PQerrormsg);