From: Stephen Hemminger <stephen@networkplumber.org>
To: netdev@vger.kernel.org
Cc: Stephen Hemminger <stephen@networkplumber.org>
Subject: [PATCH iproute2 v2 1/9] bridge: avoid snprint truncation on time
Date: Tue, 20 Mar 2018 13:29:01 -0700 [thread overview]
Message-ID: <20180320202909.22166-2-stephen@networkplumber.org> (raw)
In-Reply-To: <20180320202909.22166-1-stephen@networkplumber.org>
This fixes new gcc warning about possible string overflow.
mdb.c: In function ‘__print_router_port_stats’:
mdb.c:61:11: warning: ‘%.2i’ directive output may be truncated
writing between 2 and 7 bytes into a region of size
between 0 and 4 [-Wformat-truncation=]
"%4i.%.2i", (int)tv.tv_sec,
^~~~
Note: already fixed in iproute2-next.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
bridge/mdb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/bridge/mdb.c b/bridge/mdb.c
index 58c20b82b8a6..659cac3ff20a 100644
--- a/bridge/mdb.c
+++ b/bridge/mdb.c
@@ -55,7 +55,7 @@ static void __print_router_port_stats(FILE *f, struct rtattr *pattr)
__jiffies_to_tv(&tv,
rta_getattr_u32(tb[MDBA_ROUTER_PATTR_TIMER]));
if (jw_global) {
- char formatted_time[9];
+ char formatted_time[32];
snprintf(formatted_time, sizeof(formatted_time),
"%4i.%.2i", (int)tv.tv_sec,
@@ -184,7 +184,7 @@ static void print_mdb_entry(FILE *f, int ifindex, struct br_mdb_entry *e,
__jiffies_to_tv(&tv, rta_getattr_u32(tb[MDBA_MDB_EATTR_TIMER]));
if (jw_global) {
- char formatted_time[9];
+ char formatted_time[32];
snprintf(formatted_time, sizeof(formatted_time),
"%4i.%.2i", (int)tv.tv_sec,
--
2.16.2
next prev parent reply other threads:[~2018-03-20 20:29 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-20 20:29 [PATCH iproute2 v2 0/9] gcc-8 warning fixes Stephen Hemminger
2018-03-20 20:29 ` Stephen Hemminger [this message]
2018-03-20 20:29 ` [PATCH iproute2 v2 2/9] pedit: fix strncpy warning Stephen Hemminger
2018-03-20 20:29 ` [PATCH iproute2 v2 3/9] ip: use strlcpy() to avoid truncation Stephen Hemminger
2018-03-20 20:29 ` [PATCH iproute2 v2 4/9] tunnel: use strlcpy to avoid strncpy warnings Stephen Hemminger
2018-03-20 20:29 ` [PATCH iproute2 v2 5/9] namespace: fix warning snprintf buffer Stephen Hemminger
2018-03-21 9:21 ` Sergei Shtylyov
2018-03-20 20:29 ` [PATCH iproute2 v2 6/9] tc_class: fix snprintf warning Stephen Hemminger
2018-03-20 20:29 ` [PATCH iproute2 v2 7/9] ematch: fix possible snprintf overflow Stephen Hemminger
2018-03-20 20:29 ` [PATCH iproute2 v2 8/9] misc: avoid snprintf warnings in ss and nstat Stephen Hemminger
2018-03-20 20:29 ` [PATCH iproute2 v2 9/9] bpf: avoid compiler warnings about strncpy Stephen Hemminger
2018-03-20 21:12 ` Daniel Borkmann
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