qemu/qemu-slirp-use-after-free.patch
Mark McLoughlin 978033114a - Fix a use-after-free crasher in the slirp code (#539583)
- Fix overflow in the parallels image format support (#533573)
2009-11-20 18:28:23 +00:00

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Diff

From 56d370091cb01878c580f528011cd1717f8077fa Mon Sep 17 00:00:00 2001
From: Mark McLoughlin <markmc@redhat.com>
Date: Fri, 20 Nov 2009 18:07:15 +0000
Subject: [PATCH] slirp: fix use-after-free
460fec67ee introduced a use-after free in slirp.
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Fedora-patch: qemu-slirp-use-after-free.patch
---
slirp/mbuf.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/slirp/mbuf.c b/slirp/mbuf.c
index 7652fea..87508ba 100644
--- a/slirp/mbuf.c
+++ b/slirp/mbuf.c
@@ -95,8 +95,8 @@ m_free(struct mbuf *m)
* Either free() it or put it on the free list
*/
if (m->m_flags & M_DOFREE) {
- free(m);
m->slirp->mbuf_alloced--;
+ free(m);
} else if ((m->m_flags & M_FREELIST) == 0) {
insque(m,&m->slirp->m_freelist);
m->m_flags = M_FREELIST; /* Clobber other flags */
--
1.6.2.5