5.0-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit abdf47aab4123ece48877cab4153db44fe4dc340 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/veth.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/veth.c b/drivers/net/veth.c index f412ea1cef18..b203d1867959 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; }