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From: Hilko Bengen <bengen@debian.org>
Date: Mon, 10 Apr 2023 13:45:29 +0200
Subject: Add libguestfs-common patch to fix CVE-2022-2211
git shortlog 9e990f3e4530..35467027f657 from libguestfs-common
Laszlo Ersek (1):
options: fix buffer overflow in get_keys() [CVE-2022-2211]
---
common/options/keys.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/common/options/keys.c b/common/options/keys.c
index 798315c..d27a712 100644
--- a/common/options/keys.c
+++ b/common/options/keys.c
@@ -128,17 +128,23 @@ read_first_line_from_file (const char *filename)
char **
get_keys (struct key_store *ks, const char *device, const char *uuid)
{
- size_t i, j, len;
+ size_t i, j, nmemb;
char **r;
char *s;
/* We know the returned list must have at least one element and not
* more than ks->nr_keys.
*/
- len = 1;
- if (ks)
- len = MIN (1, ks->nr_keys);
- r = calloc (len+1, sizeof (char *));
+ nmemb = 1;
+ if (ks && ks->nr_keys > nmemb)
+ nmemb = ks->nr_keys;
+
+ /* make room for the terminating NULL */
+ if (nmemb == (size_t)-1)
+ error (EXIT_FAILURE, 0, _("size_t overflow"));
+ nmemb++;
+
+ r = calloc (nmemb, sizeof (char *));
if (r == NULL)
error (EXIT_FAILURE, errno, "calloc");
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