From: Sameeh Jubran Date: Wed, 1 May 2019 13:47:10 +0000 (+0300) Subject: net: ena: gcc 8: fix compilation warning X-Git-Tag: v5.2-rc1~133^2^2~19^2 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=f913308879bc6ae437ce64d878c7b05643ddea44;p=linux.git net: ena: gcc 8: fix compilation warning GCC 8 contains a number of new warnings as well as enhancements to existing checkers. The warning - Wstringop-truncation - warns for calls to bounded string manipulation functions such as strncat, strncpy, and stpncpy that may either truncate the copied string or leave the destination unchanged. In our case the destination string length (32 bytes) is much shorter than the source string (64 bytes) which causes this warning to show up. In general the destination has to be at least a byte larger than the length of the source string with strncpy for this warning not to showup. This can be easily fixed by using strlcpy instead which already does the truncation to the string. Documentation for this function can be found here: https://elixir.bootlin.com/linux/latest/source/lib/string.c#L141 Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)") Signed-off-by: Sameeh Jubran Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index 03244155f74c..bc5997a5f809 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -2298,7 +2298,7 @@ static void ena_config_host_info(struct ena_com_dev *ena_dev, host_info->bdf = (pdev->bus->number << 8) | pdev->devfn; host_info->os_type = ENA_ADMIN_OS_LINUX; host_info->kernel_ver = LINUX_VERSION_CODE; - strncpy(host_info->kernel_ver_str, utsname()->version, + strlcpy(host_info->kernel_ver_str, utsname()->version, sizeof(host_info->kernel_ver_str) - 1); host_info->os_dist = 0; strncpy(host_info->os_dist_str, utsname()->release,