diff mbox series

[v8,7/8] net: Replace strcpy() with strscpy()

Message ID 20240828030321.20688-8-laoar.shao@gmail.com (mailing list archive)
State Not Applicable
Delegated to: Netdev Maintainers
Headers show
Series Improve the copy of task comm | expand

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Commit Message

Yafang Shao Aug. 28, 2024, 3:03 a.m. UTC 
To prevent errors from occurring when the src string is longer than the dst
string in strcpy(), we should use strscpy() instead. This approach
also facilitates future extensions to the task comm.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: David Ahern <dsahern@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
---
 net/ipv6/ndisc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Justin Stitt Sept. 12, 2024, 9:22 p.m. UTC | #1 
Hi,

On Wed, Aug 28, 2024 at 11:03:20AM GMT, Yafang Shao wrote:
> To prevent errors from occurring when the src string is longer than the dst
> string in strcpy(), we should use strscpy() instead. This approach
> also facilitates future extensions to the task comm.
> 
> Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: David Ahern <dsahern@kernel.org>
> Cc: Eric Dumazet <edumazet@google.com>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Paolo Abeni <pabeni@redhat.com>
> ---
>  net/ipv6/ndisc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
> index b8eec1b6cc2c..cf7c36463b33 100644
> --- a/net/ipv6/ndisc.c
> +++ b/net/ipv6/ndisc.c
> @@ -1944,7 +1944,7 @@ static void ndisc_warn_deprecated_sysctl(const struct ctl_table *ctl,
>  	static char warncomm[TASK_COMM_LEN];
>  	static int warned;
>  	if (strcmp(warncomm, current->comm) && warned < 5) {
> -		strcpy(warncomm, current->comm);
> +		strscpy(warncomm, current->comm);
>  		pr_warn("process `%s' is using deprecated sysctl (%s) net.ipv6.neigh.%s.%s - use net.ipv6.neigh.%s.%s_ms instead\n",
>  			warncomm, func,
>  			dev_name, ctl->procname,
> -- 
> 2.43.5
> 
>

Reviewed-by: Justin Stitt <justinstitt@google.com>

Thanks
Justin
diff mbox series

Patch

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index b8eec1b6cc2c..cf7c36463b33 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1944,7 +1944,7 @@  static void ndisc_warn_deprecated_sysctl(const struct ctl_table *ctl,
 	static char warncomm[TASK_COMM_LEN];
 	static int warned;
 	if (strcmp(warncomm, current->comm) && warned < 5) {
-		strcpy(warncomm, current->comm);
+		strscpy(warncomm, current->comm);
 		pr_warn("process `%s' is using deprecated sysctl (%s) net.ipv6.neigh.%s.%s - use net.ipv6.neigh.%s.%s_ms instead\n",
 			warncomm, func,
 			dev_name, ctl->procname,