Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worst scenario, could lead to heap overflows. Also, address the following sparse warnings: drivers/staging/greybus/i2c.c:111:24: warning: using sizeof on a flexible structure Link: https://github.com/KSPP/linux/issues/174 Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> --- drivers/staging/greybus/i2c.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/staging/greybus/i2c.c b/drivers/staging/greybus/i2c.c index de2f6516da09..9dfc6791c20e 100644 --- a/drivers/staging/greybus/i2c.c +++ b/drivers/staging/greybus/i2c.c @@ -108,9 +108,7 @@ gb_i2c_operation_create(struct gb_connection *connection, else data_out_size += (u32)msg->len; - request_size = sizeof(*request); - request_size += msg_count * sizeof(*op); - request_size += data_out_size; + request_size = struct_size(request, ops, msg_count) + data_out_size; /* Response consists only of incoming data */ operation = gb_operation_create(connection, GB_I2C_TYPE_TRANSFER, -- 2.27.0
