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List: xen-cvs
Subject: [Xen-changelog] [xen master] vmap: ASSERT on NULL
From: patchbot () xen ! org
Date: 2016-03-18 10:44:53
Message-ID: E1agrtl-0002q5-90 () xenbits ! xenproject ! org
[Download RAW message or body]
commit 1e4faa2d25639856f776460e8cbbe2b48843dd20
Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
AuthorDate: Thu Mar 17 13:48:24 2016 +0100
Commit: Jan Beulich <jbeulich@suse.com>
CommitDate: Thu Mar 17 13:48:24 2016 +0100
vmap: ASSERT on NULL
The vmap_to_page macro (three levels deep!) can come up with
a NULL pointer. Lets add the proper ASSERT to catch this errant
behavior.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
xen/common/vmap.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/xen/common/vmap.c b/xen/common/vmap.c
index c57239f..134eda0 100644
--- a/xen/common/vmap.c
+++ b/xen/common/vmap.c
@@ -279,8 +279,12 @@ void vfree(void *va)
ASSERT(pages);
for ( i = 0; i < pages; i++ )
- page_list_add(vmap_to_page(va + i * PAGE_SIZE), &pg_list);
+ {
+ struct page_info *page = vmap_to_page(va + i * PAGE_SIZE);
+ ASSERT(page);
+ page_list_add(page, &pg_list);
+ }
vunmap(va);
while ( (pg = page_list_remove_head(&pg_list)) != NULL )
--
generated by git-patchbot for /home/xen/git/xen.git#master
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