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[PULL,18/21] vvfat: initialize memory after allocating it

Message ID 1500387486-5469-19-git-send-email-kwolf@redhat.com
State New
Headers show

Commit Message

Kevin Wolf July 18, 2017, 2:18 p.m. UTC 
From: Hervé Poussineau <hpoussin@reactos.org>

This prevents some host to guest memory content leaks.

Fixes: https://bugs.launchpad.net/qemu/+bug/1599539

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/vvfat.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/block/vvfat.c b/block/vvfat.c
index ea7775f..6b11596 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -115,6 +115,7 @@  static inline int array_ensure_allocated(array_t* array, int index)
         array->pointer = g_realloc(array->pointer, new_size);
         if (!array->pointer)
             return -1;
+        memset(array->pointer + array->size, 0, new_size - array->size);
         array->size = new_size;
         array->next = index + 1;
     }