58 lines
1.9 KiB
Diff
58 lines
1.9 KiB
Diff
|
From 8b6f528e52e18b7a69f90b8dc3671d7b1147d9f3 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Chris Coulson <chris.coulson@canonical.com>
|
||
|
|
Date: Tue, 1 Dec 2020 23:41:24 +0000
|
||
|
|
Subject: [PATCH] commands/hashsum: Fix a memory leak
|
||
|
|
|
||
|
|
check_list() uses grub_file_getline(), which allocates a buffer.
|
||
|
|
If the hash list file contains invalid lines, the function leaks
|
||
|
|
this buffer when it returns an error.
|
||
|
|
|
||
|
|
Fixes: CID 176635
|
||
|
|
|
||
|
|
Signed-off-by: Chris Coulson <chris.coulson@canonical.com>
|
||
|
|
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
|
||
|
|
Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
|
||
|
|
---
|
||
|
|
grub-core/commands/hashsum.c | 15 ++++++++++++---
|
||
|
|
1 file changed, 12 insertions(+), 3 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/grub-core/commands/hashsum.c b/grub-core/commands/hashsum.c
|
||
|
|
index 456ba90..b8a22b0 100644
|
||
|
|
--- a/grub-core/commands/hashsum.c
|
||
|
|
+++ b/grub-core/commands/hashsum.c
|
||
|
|
@@ -128,11 +128,17 @@ check_list (const gcry_md_spec_t *hash, const char *hashfilename,
|
||
|
|
high = hextoval (*p++);
|
||
|
|
low = hextoval (*p++);
|
||
|
|
if (high < 0 || low < 0)
|
||
|
|
- return grub_error (GRUB_ERR_BAD_FILE_TYPE, "invalid hash list");
|
||
|
|
+ {
|
||
|
|
+ grub_free (buf);
|
||
|
|
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "invalid hash list");
|
||
|
|
+ }
|
||
|
|
expected[i] = (high << 4) | low;
|
||
|
|
}
|
||
|
|
if ((p[0] != ' ' && p[0] != '\t') || (p[1] != ' ' && p[1] != '\t'))
|
||
|
|
- return grub_error (GRUB_ERR_BAD_FILE_TYPE, "invalid hash list");
|
||
|
|
+ {
|
||
|
|
+ grub_free (buf);
|
||
|
|
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "invalid hash list");
|
||
|
|
+ }
|
||
|
|
p += 2;
|
||
|
|
if (prefix)
|
||
|
|
{
|
||
|
|
@@ -140,7 +146,10 @@ check_list (const gcry_md_spec_t *hash, const char *hashfilename,
|
||
|
|
|
||
|
|
filename = grub_xasprintf ("%s/%s", prefix, p);
|
||
|
|
if (!filename)
|
||
|
|
- return grub_errno;
|
||
|
|
+ {
|
||
|
|
+ grub_free (buf);
|
||
|
|
+ return grub_errno;
|
||
|
|
+ }
|
||
|
|
file = grub_file_open (filename, GRUB_FILE_TYPE_TO_HASH
|
||
|
|
| (!uncompress ? GRUB_FILE_TYPE_NO_DECOMPRESS
|
||
|
|
: GRUB_FILE_TYPE_NONE));
|
||
|
|
--
|
||
|
|
2.14.2
|
||
|
|
|