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diff -up cups-1.5.0/backend/snmp.c.snmp-bad-uri cups-1.5.0/backend/snmp.c
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--- cups-1.5.0/backend/snmp.c.snmp-bad-uri 2012-01-17 11:51:00.786457690 +0000
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+++ cups-1.5.0/backend/snmp.c 2012-01-17 11:51:57.123384361 +0000
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@@ -1120,7 +1120,8 @@ read_snmp_response(int fd) /* I - SNMP
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case DEVICE_URI :
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if (device && packet.object_type == CUPS_ASN1_OCTET_STRING &&
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- !device->uri && packet.object_value.string.num_bytes > 0)
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+ !device->uri && packet.object_value.string.num_bytes > 3 &&
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+ strlen ((char *)packet.object_value.string.bytes) > 3)
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{
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/*
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* Update an existing cache entry...
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