[ Upstream commit f913308879bc6ae437ce64d878c7b05643ddea44 ]
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 sameehj@amazon.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index a6eacf2099c30..41c1c9acb3246 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -2292,7 +2292,7 @@ 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,