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[Qemu-devel] [PATCH v2 03/45] ivhsmem: read do not accept more than size


From: Marc-André Lureau
Subject: [Qemu-devel] [PATCH v2 03/45] ivhsmem: read do not accept more than sizeof(long)
Date: Tue, 28 Jul 2015 02:32:15 +0200

From: Marc-André Lureau <address@hidden>

ivshmem_read() only reads sizeof(long) from the input buffer.  Accepting
more could lead to fifo8 abort() on x86 if it's not empty.

Signed-off-by: Marc-André Lureau <address@hidden>
---
 hw/misc/ivshmem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index cc76989..fb53b3f 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -272,7 +272,7 @@ static void ivshmem_receive(void *opaque, const uint8_t 
*buf, int size)
 
 static int ivshmem_can_receive(void * opaque)
 {
-    return 8;
+    return sizeof(long);
 }
 
 static void ivshmem_event(void *opaque, int event)
-- 
2.4.3




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