From: Arnd Bergmann Date: Fri, 14 Jul 2017 12:07:02 +0000 (+0200) Subject: bnx2x: fix format overflow warning X-Git-Tag: v4.13~235^2~41 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=be9cdf1b97023cf5548bd4f6920bb546272ebabc;p=mirror_ubuntu-artful-kernel.git bnx2x: fix format overflow warning gcc notices that large queue numbers would overflow the queue name string: drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c: In function 'bnx2x_get_strings': drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c:3165:25: error: '%d' directive writing between 1 and 10 bytes into a region of size 5 [-Werror=format-overflow=] drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c:3165:25: note: directive argument in the range [0, 2147483647] drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c:3165:5: note: 'sprintf' output between 2 and 11 bytes into a destination of size 5 There is a hard limit in place that makes the number at most two digits, so the code is fine. This changes it to use snprintf() to truncate instead of overflowing, which shuts up that warning. Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c index 21bc4bed6b26..1e33abde4a3e 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c @@ -3162,7 +3162,8 @@ static void bnx2x_get_strings(struct net_device *dev, u32 stringset, u8 *buf) if (is_multi(bp)) { for_each_eth_queue(bp, i) { memset(queue_name, 0, sizeof(queue_name)); - sprintf(queue_name, "%d", i); + snprintf(queue_name, sizeof(queue_name), + "%d", i); for (j = 0; j < BNX2X_NUM_Q_STATS; j++) snprintf(buf + (k + j)*ETH_GSTRING_LEN, ETH_GSTRING_LEN,