[PATCH linux dev-6.12 02/14] net: mctp: test: make cloned_frag buffers more appropriately-sized

[Marc Olberding]

From: Jeremy Kerr <jk at codeconstruct.com.au>

In our input_cloned_frag test, we currently allocate our test buffers
arbitrarily-sized at 100 bytes.

We only expect to receive a max of 15 bytes from the socket, so reduce
to a more appropriate size. There are some upcoming changes to the
routing code which hit a frame-size limit on s390, so reduce the usage
before that lands.

Signed-off-by: Jeremy Kerr <jk at codeconstruct.com.au>
Link: https://patch.msgid.link/20250702-dev-forwarding-v5-2-1468191da8a4@codeconstruct.com.au
Signed-off-by: Paolo Abeni <pabeni at redhat.com>

(cherry picked from commit fc2b87d036e2155b16f8c53c8198df7b376fd616)
---
 net/mctp/test/route-test.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/net/mctp/test/route-test.c b/net/mctp/test/route-test.c
index 06c1897b685a8bdfd6bb4f1bccaacb53b0cd54ba..44ebc8e4e30c6a8f91360926ede99510df2576b2 100644
--- a/net/mctp/test/route-test.c
+++ b/net/mctp/test/route-test.c
@@ -933,20 +933,18 @@ static void mctp_test_route_input_cloned_frag(struct kunit *test)
 		RX_FRAG(FL_S, 0),
 		RX_FRAG(FL_E, 1),
 	};
+	const size_t data_len = 3; /* arbitrary */
+	u8 compare[3 * ARRAY_SIZE(hdrs)];
+	u8 flat[3 * ARRAY_SIZE(hdrs)];
 	struct mctp_test_route *rt;
 	struct mctp_test_dev *dev;
 	struct sk_buff *skb[5];
 	struct sk_buff *rx_skb;
 	struct socket *sock;
-	size_t data_len;
-	u8 compare[100];
-	u8 flat[100];
 	size_t total;
 	void *p;
 	int rc;
 
-	/* Arbitrary length */
-	data_len = 3;
 	total = data_len + sizeof(struct mctp_hdr);
 
 	__mctp_route_test_init(test, &dev, &rt, &sock, MCTP_NET_ANY);

-- 
2.34.1