From 7cfd037403ba34e8ed1ebfa4e7d6abec738e2000 Mon Sep 17 00:00:00 2001 From: Amos Kong Date: Thu, 21 Nov 2013 16:42:51 +0800 Subject: rng-egd: offset the point when repeatedly read from the buffer The buffer content might be read out more than once, currently we just repeatedly read the first data block, buffer offset is missing. Cc: qemu-stable@nongnu.org Signed-off-by: Amos Kong Message-id: 1385023371-8198-3-git-send-email-akong@redhat.com Signed-off-by: Anthony Liguori (cherry picked from commit 1eb1bd9eafa890f1f4d16ef5cb8b9239a86874d9) Signed-off-by: Michael Roth --- backends/rng-egd.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'backends') diff --git a/backends/rng-egd.c b/backends/rng-egd.c index 9e5a5366f7..2962795a8f 100644 --- a/backends/rng-egd.c +++ b/backends/rng-egd.c @@ -91,12 +91,14 @@ static int rng_egd_chr_can_read(void *opaque) static void rng_egd_chr_read(void *opaque, const uint8_t *buf, int size) { RngEgd *s = RNG_EGD(opaque); + size_t buf_offset = 0; while (size > 0 && s->requests) { RngRequest *req = s->requests->data; int len = MIN(size, req->size - req->offset); - memcpy(req->data + req->offset, buf, len); + memcpy(req->data + req->offset, buf + buf_offset, len); + buf_offset += len; req->offset += len; size -= len; -- cgit v1.2.1