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ext/snmp: Add null check for uninitialized SNMP session in security level setter #17332

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ext/snmp: Add null check for uninitialized SNMP session in security level setter #17332

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5 changes: 5 additions & 0 deletions ext/snmp/snmp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -944,6 +944,11 @@ static bool netsnmp_session_init(php_snmp_session **session_p, int version, zend
/* {{{ Set the security level in the snmpv3 session */
static bool netsnmp_session_set_sec_level(struct snmp_session *s, zend_string *level)
{
if (!s) {
zend_value_error("SNMP session is not initialized or has been closed");
return false;
}

if (zend_string_equals_literal_ci(level, "noAuthNoPriv") || zend_string_equals_literal_ci(level, "nanp")) {
s->securityLevel = SNMP_SEC_LEVEL_NOAUTH;
} else if (zend_string_equals_literal_ci(level, "authNoPriv") || zend_string_equals_literal_ci(level, "anp")) {
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