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-rw-r--r--lib/vsprintf.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index a48aaa79d352..6c1fb395bddf 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1675,8 +1675,16 @@ static struct random_ready_callback random_ready = {
static int __init initialize_ptr_random(void)
{
- int ret = add_random_ready_callback(&random_ready);
+ int key_size = sizeof(ptr_key);
+ int ret;
+
+ /* Use hw RNG if available. */
+ if (get_random_bytes_arch(&ptr_key, key_size) == key_size) {
+ static_branch_disable(&not_filled_random_ptr_key);
+ return 0;
+ }
+ ret = add_random_ready_callback(&random_ready);
if (!ret) {
return 0;
} else if (ret == -EALREADY) {