[PATCH] Bluetooth: bnep: refactor deprecated strcpy

[PATCH] Bluetooth: bnep: refactor deprecated strcpy

[Ajith P V]

The strcpy() function is deprecated across the kernel tree and
moving towards complete elimination. It provides no verification
limits against buffer overflows and does not guarantee strict boundary
restrictions [1][2].

Replace instances of strcpy() in `net/bluetooth/bnep/core.c` with the safer
strscpy() alternative. Since both target destination blocks are
statically allocated fixed-size arrays within their structure definitions,
leverage the compile time sizeof() operator to explicitly pass the
destination buffer capacities.

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1]
Link: https://github.com/KSPP/linux/issues/88 [2]

Signed-off-by: Ajith P V <ajithpv.linux@gmail.com>
---
 net/bluetooth/bnep/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index f7d88c33e23e..0dde82e9a085 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -670,7 +670,7 @@ int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock)
 		goto failed;
 	}
 
-	strcpy(req->device, dev->name);
+	strscpy(req->device, dev->name, sizeof(req->device));
 	up_write(&bnep_session_sem);
 	return 0;
 
@@ -712,7 +712,7 @@ static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s)
 
 	memset(ci, 0, sizeof(*ci));
 	memcpy(ci->dst, s->eh.h_source, ETH_ALEN);
-	strcpy(ci->device, s->dev->name);
+	strscpy(ci->device, s->dev->name, sizeof(ci->device));
 	ci->flags = s->flags & valid_flags;
 	ci->state = s->state;
 	ci->role  = s->role;
-- 
2.43.0