Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:  hwmon: (pmbus/adm1266) include PEC byte in pmbus_block_xfer read buffer  adm1266_pmbus_block_xfer() sets up the read transaction with  	.buf = data->read_buf, 	.len = ADM1266_PMBUS_BLOCK_MAX + 2,  but read_buf in struct adm1266_data is declared as  	u8 read_buf[ADM1266_PMBUS_BLOCK_MAX + 1];  For a max-length block response (length byte = 255 + up to 1 PEC byte), the i2c controller is told to write 257 bytes into a 256-byte buffer, putting one byte past the end of read_buf.  The same response also makes the subsequent PEC compare  	if (crc != msgs[1].buf[msgs[1].buf[0] + 1])  read a byte beyond the array.  Bump the read_buf declaration to ADM1266_PMBUS_BLOCK_MAX + 2 so the buffer can hold the length byte, up to 255 payload bytes, and the PEC byte the i2c_msg length already accounts for.