53 lines
1.6 KiB
Diff
53 lines
1.6 KiB
Diff
|
From fa9ad46e1a4b3707a465bccf6f4431db7a647a08 Mon Sep 17 00:00:00 2001
|
||
|
From: Markus Armbruster <armbru@redhat.com>
|
||
|
Date: Fri, 28 Oct 2011 17:07:02 +0200
|
||
|
Subject: [PATCH] acl: Fix use after free in qemu_acl_reset()
|
||
|
MIME-Version: 1.0
|
||
|
Content-Type: text/plain; charset=UTF-8
|
||
|
Content-Transfer-Encoding: 8bit
|
||
|
|
||
|
Reproducer:
|
||
|
|
||
|
$ MALLOC_PERTURB_=234 qemu-system-x86_64 -vnc :0,acl,sasl [...]
|
||
|
QEMU 0.15.50 monitor - type 'help' for more information
|
||
|
(qemu) acl_add vnc.username fred allow
|
||
|
acl: added rule at position 1
|
||
|
(qemu) acl_reset vnc.username
|
||
|
Segmentation fault (core dumped)
|
||
|
|
||
|
Spotted by Coverity.
|
||
|
|
||
|
Signed-off-by: Markus Armbruster <armbru@redhat.com>
|
||
|
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
|
||
|
(cherry picked from commit 0ce6a434176e274a7e86bcaa268542c5cc402696)
|
||
|
|
||
|
Signed-off-by: Bruce Rogers <brogers@suse.com>
|
||
|
Signed-off-by: Andreas Färber <afaerber@suse.de>
|
||
|
---
|
||
|
acl.c | 4 ++--
|
||
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
||
|
|
||
|
diff --git a/acl.c b/acl.c
|
||
|
index 82c2704..cae059f 100644
|
||
|
--- a/acl.c
|
||
|
+++ b/acl.c
|
||
|
@@ -95,13 +95,13 @@ int qemu_acl_party_is_allowed(qemu_acl *acl,
|
||
|
|
||
|
void qemu_acl_reset(qemu_acl *acl)
|
||
|
{
|
||
|
- qemu_acl_entry *entry;
|
||
|
+ qemu_acl_entry *entry, *next_entry;
|
||
|
|
||
|
/* Put back to deny by default, so there is no window
|
||
|
* of "open access" while the user re-initializes the
|
||
|
* access control list */
|
||
|
acl->defaultDeny = 1;
|
||
|
- QTAILQ_FOREACH(entry, &acl->entries, next) {
|
||
|
+ QTAILQ_FOREACH_SAFE(entry, &acl->entries, next, next_entry) {
|
||
|
QTAILQ_REMOVE(&acl->entries, entry, next);
|
||
|
free(entry->match);
|
||
|
free(entry);
|
||
|
--
|
||
|
1.7.11.2
|
||
|
|