[PATCH] libkvm: null pointer dereference in kvm_destroy_phys_mem

[Carlo Marcelo Arenas Belon <carenas-kLeDWSohozoJb6fo7hG9ng@public.gmane.org>]

The following patch eliminates the uninitialized mem pointer in 
kvm_destroy_phys_mem and uses instead the corresponding entry from the 
slots array in the conditional to fix :

  libkvm.c:580: warning: 'mem' is used uninitialized in this function

Signed-off-by: Carlo Marcelo Arenas Belon <carenas-kLeDWSohozoJb6fo7hG9ng@public.gmane.org>
---
 libkvm/libkvm.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/libkvm/libkvm.c b/libkvm/libkvm.c
index 93d7b6b..8f7a34f 100644
--- a/libkvm/libkvm.c
+++ b/libkvm/libkvm.c
@@ -567,7 +567,6 @@ void kvm_destroy_phys_mem(kvm_context_t kvm, unsigned long phys_start,
 			  unsigned long len)
 {
 	int slot;
-	struct kvm_memory_region *mem;
 
 	slot = get_slot(phys_start);
 
@@ -579,8 +578,8 @@ void kvm_destroy_phys_mem(kvm_context_t kvm, unsigned long phys_start,
 	if (phys_start != slots[slot].phys_addr) {
 		fprintf(stderr,
 			"WARNING: %s: phys_start is 0x%lx expecting 0x%llx\n",
-			__FUNCTION__, phys_start, mem->guest_phys_addr);
-		phys_start = mem->guest_phys_addr;
+			__FUNCTION__, phys_start, slots[slot].phys_addr);
+		phys_start = slots[slot].phys_addr;
 	}
 	kvm_create_phys_mem(kvm, phys_start, 0, 0, 0);
 }
-- 
1.5.2.5


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