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[Qemu-block] [PATCH for-2.8] gluster: Fix use after free in glfs_clear_p
From: |
Kevin Wolf |
Subject: |
[Qemu-block] [PATCH for-2.8] gluster: Fix use after free in glfs_clear_preopened() |
Date: |
Thu, 17 Nov 2016 11:30:08 +0100 |
This fixes a use-after-free bug introduced in commit 6349c154. We need
to use QLIST_FOREACH_SAFE() when freeing elements in the loop. Spotted
by Coverity.
Signed-off-by: Kevin Wolf <address@hidden>
---
block/gluster.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/block/gluster.c b/block/gluster.c
index 0ce15f7..891c13b 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -239,12 +239,13 @@ static glfs_t *glfs_find_preopened(const char *volume)
static void glfs_clear_preopened(glfs_t *fs)
{
ListElement *entry = NULL;
+ ListElement *next;
if (fs == NULL) {
return;
}
- QLIST_FOREACH(entry, &glfs_list, list) {
+ QLIST_FOREACH_SAFE(entry, &glfs_list, list, next) {
if (entry->saved.fs == fs) {
if (--entry->saved.ref) {
return;
--
1.8.3.1
- [Qemu-block] [PATCH for-2.8] gluster: Fix use after free in glfs_clear_preopened(),
Kevin Wolf <=