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fix batt_smbus: add bound checks when accessing argv

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This commit is contained in:
Beat Küng
2019-11-04 11:55:13 +01:00
parent 60f55a4fa1
commit b487920cf4
1 changed files with 4 additions and 2 deletions
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6
src/drivers/batt_smbus/batt_smbus.cpp
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@@ -620,7 +620,7 @@ int BATT_SMBUS::custom_command(int argc, char *argv[])
}
if (!strcmp(input, "write_flash")) {
if (argv[1] && argv[2]) {
if (argc >= 3) {
uint16_t address = atoi(argv[1]);
unsigned length = atoi(argv[2]);
uint8_t tx_buf[32] = {};
@@ -632,7 +632,9 @@ int BATT_SMBUS::custom_command(int argc, char *argv[])
// Data needs to be fed in 1 byte (0x01) at a time.
for (unsigned i = 0; i < length; i++) {
tx_buf[i] = atoi(argv[3 + i]);
if ((unsigned)argc <= 3 + i) {
tx_buf[i] = atoi(argv[3 + i]);
}
}
if (PX4_OK != obj->dataflash_write(address, tx_buf, length)) {