From: Stephen Hemminger <stephen@networkplumber.org>
To: netdev@vger.kernel.org
Cc: Stephen Hemminger <stephen@networkplumber.org>
Subject: [PATCH iproute2 v2 6/9] tc_class: fix snprintf warning
Date: Tue, 20 Mar 2018 13:29:06 -0700 [thread overview]
Message-ID: <20180320202909.22166-7-stephen@networkplumber.org> (raw)
In-Reply-To: <20180320202909.22166-1-stephen@networkplumber.org>
Size buffer big enough to avoid any possible overflow.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
tc/tc_class.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tc/tc_class.c b/tc/tc_class.c
index 1b214b82c702..91802518bb27 100644
--- a/tc/tc_class.c
+++ b/tc/tc_class.c
@@ -219,7 +219,7 @@ static void graph_cls_show(FILE *fp, char *buf, struct hlist_head *root_list,
char cls_id_str[256] = {};
struct rtattr *tb[TCA_MAX + 1];
struct qdisc_util *q;
- char str[100] = {};
+ char str[300] = {};
hlist_for_each_safe(n, tmp_cls, root_list) {
struct hlist_node *c, *tmp_chld;
@@ -242,7 +242,8 @@ static void graph_cls_show(FILE *fp, char *buf, struct hlist_head *root_list,
graph_indent(buf, cls, 0, 0);
print_tc_classid(cls_id_str, sizeof(cls_id_str), cls->id);
- sprintf(str, "+---(%s)", cls_id_str);
+ snprintf(str, sizeof(str),
+ "+---(%s)", cls_id_str);
strcat(buf, str);
parse_rtattr(tb, TCA_MAX, (struct rtattr *)cls->data,
--
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 ` [PATCH iproute2 v2 1/9] bridge: avoid snprint truncation on time Stephen Hemminger
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 ` Stephen Hemminger [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180320202909.22166-7-stephen@networkplumber.org \
--to=stephen@networkplumber.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox