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dns_rdata_fromwire() only accepts input up to 2^16-1 octets.

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This commit is contained in:
Mark Andrews
2020-08-15 08:50:37 +10:00
committed by Ondřej Surý
parent e4d30cb007
commit aa811801cb
1 changed files with 5 additions and 1 deletions
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6
fuzz/dns_rdata_fromwire_text.c
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@@ -95,7 +95,11 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
unsigned int classes = (sizeof(classlist) / sizeof(classlist[0]));
unsigned int types = 1, flags, t;
if (size < 2) {
/*
* First 2 bytes are used to select type and class.
* dns_rdata_fromwire() only accepts input up to 2^16-1 octets.
*/
if (size < 2 || size > 0xffff + 2) {
return (0);
}