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authorFlorian Fainelli <f.fainelli@gmail.com>2019-02-21 20:09:29 -0800
committerDavid S. Miller <davem@davemloft.net>2019-02-23 13:44:58 -0800
commitabdf47aab4123ece48877cab4153db44fe4dc340 (patch)
tree54027dd887f60aacb75a3f4451c0acd00f9306d8
parent135e7245479addc6b1f5d031e3d7e2ddb3d2b109 (diff)
downloadlinux-abdf47aab4123ece48877cab4153db44fe4dc340.tar.bz2
veth: Fix -Wformat-truncation
Provide a precision hint to snprintf() in order to eliminate a -Wformat-truncation warning provided below. A maximum of 11 characters is allowed to reach a maximum of 32 - 1 characters given a possible maximum value of queues using up to UINT_MAX which occupies 10 characters. Incidentally 11 is the number of characters for "xdp_packets" which is the largest string we append. drivers/net/veth.c: In function 'veth_get_strings': drivers/net/veth.c:118:47: warning: '%s' directive output may be truncated writing up to 31 bytes into a region of size between 12 and 21 [-Wformat-truncation=] snprintf(p, ETH_GSTRING_LEN, "rx_queue_%u_%s", ^~ drivers/net/veth.c:118:5: note: 'snprintf' output between 12 and 52 bytes into a destination of size 32 snprintf(p, ETH_GSTRING_LEN, "rx_queue_%u_%s", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ i, veth_rq_stats_desc[j].desc); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/veth.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index fbf890ebbeae..569e87a51a33 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -115,7 +115,8 @@ static void veth_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
p += sizeof(ethtool_stats_keys);
for (i = 0; i < dev->real_num_rx_queues; i++) {
for (j = 0; j < VETH_RQ_STATS_LEN; j++) {
- snprintf(p, ETH_GSTRING_LEN, "rx_queue_%u_%s",
+ snprintf(p, ETH_GSTRING_LEN,
+ "rx_queue_%u_%.11s",
i, veth_rq_stats_desc[j].desc);
p += ETH_GSTRING_LEN;
}