Wire: Fix buffer overflow in requestFrom.

Fixes #813. Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
arduino · Apr 19, 2024 · 461013c · 461013c
1 parent 59ec204
commit 461013c
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/libraries/Wire/Wire.cpp b/libraries/Wire/Wire.cpp
@@ -93,6 +93,7 @@ uint8_t arduino::MbedI2C::endTransmission(void) {
 
 size_t arduino::MbedI2C::requestFrom(uint8_t address, size_t len, bool stopBit) {
 	char buf[256];
+	len = min(len, sizeof(buf));
 	int ret = master->read(address << 1, buf, len, !stopBit);
 	if (ret != 0) {
 		return 0;