[PATCH net-next] tipc: Removing deprecated strncpy()

Kevin Paul Reddy Janagari
2025-04-11T08:50:34Z

This patch suggests the replacement of strncpy with strscpy
as per Documentation/process/deprecated.
The strncpy() fails to guarantee NULL termination,
The function adds zero pads which isn't really convenient for short strings
as it may cause performance issues.

strscpy() is a preferred replacement because
it overcomes the limitations of strncpy mentioned above.

Compile Tested

Signed-off-by: Kevin Paul Reddy Janagari <kevinpaul468@gmail.com>
---
net/tipc/link.c | 2 +-
net/tipc/node.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/tipc/link.c b/net/tipc/link.c
index 18be6ff4c3db..3ee44d731700 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -2228,7 +2228,7 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
break;
if (msg_data_sz(hdr) < TIPC_MAX_IF_NAME)
break;
- strncpy(if_name, data, TIPC_MAX_IF_NAME);
+ strscpy(if_name, data, TIPC_MAX_IF_NAME);

/* Update own tolerance if peer indicates a non-zero value */
if (tipc_in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
diff --git a/net/tipc/node.c b/net/tipc/node.c
index ccf5e427f43e..cb43f2016a70 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -1581,7 +1581,7 @@ int tipc_node_get_linkname(struct net *net, u32 bearer_id, u32 addr,
tipc_node_read_lock(node);
link = node->links[bearer_id].link;
if (link) {
- strncpy(linkname, tipc_link_name(link), len);
+ strscpy(linkname, tipc_link_name(link), len);
err = 0;
}
tipc_node_read_unlock(node);
--
2.39.5