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device_ledger: add paranoid buffer overflow check

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Coverity 200183
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moneromooo-monero 2019-07-03 13:49:59 +00:00
parent cdfa2e58df
commit 7c894fc7fd
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1 changed files with 3 additions and 1 deletions
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4
src/device/device_ledger.cpp
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@ -320,7 +320,9 @@ namespace hw {
bool device_ledger::reset() { bool device_ledger::reset() {
reset_buffer(); reset_buffer();
int offset = set_command_header_noopt(INS_RESET); int offset = set_command_header_noopt(INS_RESET);
memmove(this->buffer_send+offset, MONERO_VERSION, strlen(MONERO_VERSION)); const size_t verlen = strlen(MONERO_VERSION);
ASSERT_X(offset + verlen <= BUFFER_SEND_SIZE, "MONERO_VERSION is too long")
memmove(this->buffer_send+offset, MONERO_VERSION, verlen);
offset += strlen(MONERO_VERSION); offset += strlen(MONERO_VERSION);
this->buffer_send[4] = offset-5; this->buffer_send[4] = offset-5;
this->length_send = offset; this->length_send = offset;