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From 74074e8a7c60592cf1cc6469dbc2550d24aeded3 Mon Sep 17 00:00:00 2001
From: Ladi Prosek <lprosek@redhat.com>
Date: Thu, 3 Mar 2016 09:37:16 +0100
Subject: [PATCH] rng: move request queue from RngEgd to RngBackend
The 'requests' field now lives in the RngBackend parent class.
There are no functional changes in this commit.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Message-Id: <1456994238-9585-3-git-send-email-lprosek@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Upstream-Status: Backport
in support of CVE-2016-2858
Signed-off-by: Armin Kuster <akuster@mvista.com>
---
backends/rng-egd.c | 28 +++++++++-------------------
include/sysemu/rng.h | 11 +++++++++++
2 files changed, 20 insertions(+), 19 deletions(-)
Index: qemu-2.5.0/backends/rng-egd.c
===================================================================
--- qemu-2.5.0.orig/backends/rng-egd.c
+++ qemu-2.5.0/backends/rng-egd.c
@@ -24,19 +24,8 @@ typedef struct RngEgd
CharDriverState *chr;
char *chr_name;
-
- GSList *requests;
} RngEgd;
-typedef struct RngRequest
-{
- EntropyReceiveFunc *receive_entropy;
- uint8_t *data;
- void *opaque;
- size_t offset;
- size_t size;
-} RngRequest;
-
static void rng_egd_request_entropy(RngBackend *b, size_t size,
EntropyReceiveFunc *receive_entropy,
void *opaque)
@@ -65,7 +54,7 @@ static void rng_egd_request_entropy(RngB
size -= len;
}
- s->requests = g_slist_append(s->requests, req);
+ s->parent.requests = g_slist_append(s->parent.requests, req);
}
static void rng_egd_free_request(RngRequest *req)
@@ -80,7 +69,7 @@ static int rng_egd_chr_can_read(void *op
GSList *i;
int size = 0;
- for (i = s->requests; i; i = i->next) {
+ for (i = s->parent.requests; i; i = i->next) {
RngRequest *req = i->data;
size += req->size - req->offset;
}
@@ -93,8 +82,8 @@ static void rng_egd_chr_read(void *opaqu
RngEgd *s = RNG_EGD(opaque);
size_t buf_offset = 0;
- while (size > 0 && s->requests) {
- RngRequest *req = s->requests->data;
+ while (size > 0 && s->parent.requests) {
+ RngRequest *req = s->parent.requests->data;
int len = MIN(size, req->size - req->offset);
memcpy(req->data + req->offset, buf + buf_offset, len);
@@ -103,7 +92,8 @@ static void rng_egd_chr_read(void *opaqu
size -= len;
if (req->offset == req->size) {
- s->requests = g_slist_remove_link(s->requests, s->requests);
+ s->parent.requests = g_slist_remove_link(s->parent.requests,
+ s->parent.requests);
req->receive_entropy(req->opaque, req->data, req->size);
@@ -116,12 +106,12 @@ static void rng_egd_free_requests(RngEgd
{
GSList *i;
- for (i = s->requests; i; i = i->next) {
+ for (i = s->parent.requests; i; i = i->next) {
rng_egd_free_request(i->data);
}
- g_slist_free(s->requests);
- s->requests = NULL;
+ g_slist_free(s->parent.requests);
+ s->parent.requests = NULL;
}
static void rng_egd_cancel_requests(RngBackend *b)
Index: qemu-2.5.0/include/sysemu/rng.h
===================================================================
--- qemu-2.5.0.orig/include/sysemu/rng.h
+++ qemu-2.5.0/include/sysemu/rng.h
@@ -25,6 +25,7 @@
#define RNG_BACKEND_CLASS(klass) \
OBJECT_CLASS_CHECK(RngBackendClass, (klass), TYPE_RNG_BACKEND)
+typedef struct RngRequest RngRequest;
typedef struct RngBackendClass RngBackendClass;
typedef struct RngBackend RngBackend;
@@ -32,6 +33,15 @@ typedef void (EntropyReceiveFunc)(void *
const void *data,
size_t size);
+struct RngRequest
+{
+ EntropyReceiveFunc *receive_entropy;
+ uint8_t *data;
+ void *opaque;
+ size_t offset;
+ size_t size;
+};
+
struct RngBackendClass
{
ObjectClass parent_class;
@@ -49,6 +59,7 @@ struct RngBackend
/*< protected >*/
bool opened;
+ GSList *requests;
};
/**
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