|
 |
80913e |
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
|
80913e |
From: Peter Jones <pjones@redhat.com>
|
|
|
80913e |
Date: Sun, 19 Jul 2020 14:43:31 -0400
|
|
|
80913e |
Subject: [PATCH] hfsplus: fix two more overflows
|
|
|
80913e |
|
|
|
80913e |
Both node->size and node->namelen come from the supplied filesystem,
|
|
|
80913e |
which may be user-supplied. We can't trust them for the math unless we
|
|
|
80913e |
know they don't overflow; making sure they go through calloc() first
|
|
|
80913e |
will give us that.
|
|
|
80913e |
|
|
|
80913e |
Signed-off-by: Peter Jones <pjones@redhat.com>
|
|
|
80913e |
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
|
|
|
80913e |
Upstream-commit-id: b4915078903
|
|
|
80913e |
---
|
|
|
80913e |
grub-core/fs/hfsplus.c | 11 ++++++++---
|
|
|
80913e |
1 file changed, 8 insertions(+), 3 deletions(-)
|
|
|
80913e |
|
|
|
80913e |
diff --git a/grub-core/fs/hfsplus.c b/grub-core/fs/hfsplus.c
|
|
|
b32e65 |
index f1cd72398..8b17ebba2 100644
|
|
|
80913e |
--- a/grub-core/fs/hfsplus.c
|
|
|
80913e |
+++ b/grub-core/fs/hfsplus.c
|
|
|
80913e |
@@ -31,6 +31,7 @@
|
|
|
80913e |
#include <grub/hfs.h>
|
|
|
80913e |
#include <grub/charset.h>
|
|
|
80913e |
#include <grub/hfsplus.h>
|
|
|
80913e |
+#include <grub/safemath.h>
|
|
|
80913e |
|
|
|
80913e |
GRUB_MOD_LICENSE ("GPLv3+");
|
|
|
80913e |
|
|
|
80913e |
@@ -475,8 +476,12 @@ grub_hfsplus_read_symlink (grub_fshelp_node_t node)
|
|
|
80913e |
{
|
|
|
80913e |
char *symlink;
|
|
|
80913e |
grub_ssize_t numread;
|
|
|
80913e |
+ grub_size_t sz = node->size;
|
|
|
80913e |
|
|
|
80913e |
- symlink = grub_malloc (node->size + 1);
|
|
|
80913e |
+ if (grub_add (sz, 1, &sz))
|
|
|
80913e |
+ return NULL;
|
|
|
80913e |
+
|
|
|
80913e |
+ symlink = grub_malloc (sz);
|
|
|
80913e |
if (!symlink)
|
|
|
80913e |
return 0;
|
|
|
80913e |
|
|
|
80913e |
@@ -715,8 +720,8 @@ list_nodes (void *record, void *hook_arg)
|
|
|
80913e |
if (type == GRUB_FSHELP_UNKNOWN)
|
|
|
80913e |
return 0;
|
|
|
80913e |
|
|
|
80913e |
- filename = grub_malloc (grub_be_to_cpu16 (catkey->namelen)
|
|
|
80913e |
- * GRUB_MAX_UTF8_PER_UTF16 + 1);
|
|
|
80913e |
+ filename = grub_calloc (grub_be_to_cpu16 (catkey->namelen),
|
|
|
80913e |
+ GRUB_MAX_UTF8_PER_UTF16 + 1);
|
|
|
80913e |
if (! filename)
|
|
|
80913e |
return 0;
|
|
|
80913e |
|