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Problem: z85_decode fuzzer fails if fewer than 5 bytes are passed

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Solution: check immediately the size of the input
This commit is contained in:
Luca Boccassi 2020-05-21 10:22:35 +01:00
parent c1d195641d
commit 51c90a6cd5
1 changed files with 3 additions and 0 deletions
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3
tests/test_z85_decode_fuzzer.cpp
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@ -41,6 +41,9 @@ extern "C" int LLVMFuzzerTestOneInput (const uint8_t *data, size_t size)
{ {
uint8_t *secret_key; uint8_t *secret_key;
if (size < 5)
return 0;
// As per API definition, input must be divisible by 5, so truncate it if it's not // As per API definition, input must be divisible by 5, so truncate it if it's not
size -= size % 5; size -= size % 5;
// As per API definition, the destination must be at least 0.8 times the input data // As per API definition, the destination must be at least 0.8 times the input data