From 98807de9ac11a11a352f148e66e32d781f22c114 Mon Sep 17 00:00:00 2001
From: Thorsten Blum <blum@kernel.org>
Date: Sat, 26 Sep 2026 07:58:55 +0200
Subject: [PATCH] hwrng: virtio - use snprintf() in probe_common()

While the current code works correctly, replace the unbounded sprintf()
with the safer snprintf() to follow secure coding best practices.

Signed-off-by: Thorsten Blum <blum@kernel.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/char/hw_random/virtio-rng.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c
index 5b1b23b5596a..f9982217247d 100644
--- a/drivers/char/hw_random/virtio-rng.c
+++ b/drivers/char/hw_random/virtio-rng.c
@@ -162,7 +162,7 @@ static int probe_common(struct virtio_device *vdev)
 		err = index;
 		goto err_ida;
 	}
-	sprintf(vi->name, "virtio_rng.%d", index);
+	snprintf(vi->name, sizeof(vi->name), "virtio_rng.%d", vi->index);
 	init_completion(&vi->have_data);
 
 	vi->hwrng = (struct hwrng) {