From: Michael S. Tsirkin <mst@redhat.com>
Date: Wed, 12 Nov 2014 09:44:47 +0000 (+0200)
Subject: cpu: verify that block->host is set
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b78accf6147a87a3d9c1cd4287d7a1ff805f358e;p=qemu.git

cpu: verify that block->host is set

If it isn't, access at an offset will cause memory corruption.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Amos Kong <akong@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
---

diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
index 7c3a5e7dd0..62f558103d 100644
--- a/include/exec/cpu-all.h
+++ b/include/exec/cpu-all.h
@@ -316,6 +316,7 @@ typedef struct RAMBlock {
 static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset)
 {
     assert(offset < block->length);
+    assert(block->host);
     return (char *)block->host + offset;
 }