syztest
From: Arnaud Lecomte
Date: Sat Jul 26 2025 - 16:42:11 EST
#syz test
--- a/drivers/hid/hid-mcp2221.c
+++ b/drivers/hid/hid-mcp2221.c
@@ -814,6 +814,10 @@ static int mcp2221_raw_event(struct hid_device *hdev,
}
if (data[2] == MCP2221_I2C_READ_COMPL ||
data[2] == MCP2221_I2C_READ_PARTIAL) {
+ if (!mcp->rxbuf || mcp->rxbuf_idx < 0 || data[3] > 60) {
+ mcp->status = -EINVAL;
+ break;
+ }
buf = mcp->rxbuf;
memcpy(&buf[mcp->rxbuf_idx], &data[4], data[3]);
mcp->rxbuf_idx = mcp->rxbuf_idx + data[3];
--