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[12/12] netfilter: conntrack: use correct format characters

Message ID 20220609221702.347522-13-morbo@google.com (mailing list archive)
State New
Headers show
Series Clang -Wformat warning fixes | expand

Commit Message

Bill Wendling June 9, 2022, 10:16 p.m. UTC 
From: Bill Wendling <isanbard@gmail.com>

When compiling with -Wformat, clang emits the following warnings:

net/netfilter/nf_conntrack_helper.c:168:18: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                request_module(mod_name);
                               ^~~~~~~~

Use a string literal for the format string.

Link: https://github.com/ClangBuiltLinux/linux/issues/378
Signed-off-by: Bill Wendling <isanbard@gmail.com>
---
 net/netfilter/nf_conntrack_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Pablo Neira Ayuso July 11, 2022, 2:35 p.m. UTC | #1 
On Thu, Jun 09, 2022 at 10:16:31PM +0000, Bill Wendling wrote:
> From: Bill Wendling <isanbard@gmail.com>
> 
> When compiling with -Wformat, clang emits the following warnings:
> 
> net/netfilter/nf_conntrack_helper.c:168:18: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
>                 request_module(mod_name);
>                                ^~~~~~~~
> 
> Use a string literal for the format string.

Applied this patch to nf-next, thanks
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Patch

diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index c12a87ebc3ee..1e0424d37abc 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -165,7 +165,7 @@  nf_nat_helper_try_module_get(const char *name, u16 l3num, u8 protonum)
 	if (!nat) {
 		snprintf(mod_name, sizeof(mod_name), "%s", h->nat_mod_name);
 		rcu_read_unlock();
-		request_module(mod_name);
+		request_module("%s", mod_name);
 
 		rcu_read_lock();
 		nat = nf_conntrack_nat_helper_find(mod_name);