You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
1.7 KiB
64 lines
1.7 KiB
6 years ago
|
From 68ef8adcff3acc25ddac82b808c3036b4dddaf0b Mon Sep 17 00:00:00 2001
|
||
|
|
From: Lukas Czerner <lczerner@redhat.com>
|
||
|
|
Date: Thu, 20 Feb 2014 14:14:39 +0100
|
||
|
|
Subject: [PATCH 8/8] e2fsprogs: Set pointer to NULL after ext2fs_free
|
||
|
|
|
||
|
|
ext2fs_free() does not set the ext2_filsys pointer to null so the caller
|
||
|
|
is responsible to setting it himself if it is needed.
|
||
|
|
|
||
|
|
This patch fixes some places where caller did not set ext2_filsys
|
||
|
|
pointer to NULL after ext2fs_free() which might result in use after
|
||
|
|
free. Fix it.
|
||
|
|
|
||
|
|
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
|
||
|
|
---
|
||
|
|
lib/ext2fs/openfs.c | 7 ++++---
|
||
|
|
resize/resize2fs.c | 5 ++++-
|
||
|
|
2 files changed, 8 insertions(+), 4 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
|
||
|
|
index 4cdbde1..ef67493 100644
|
||
|
|
--- a/lib/ext2fs/openfs.c
|
||
|
|
+++ b/lib/ext2fs/openfs.c
|
||
|
|
@@ -419,10 +419,11 @@ errcode_t ext2fs_open2(const char *name, const char *io_options,
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
cleanup:
|
||
|
|
- if (flags & EXT2_FLAG_NOFREE_ON_ERROR)
|
||
|
|
- *ret_fs = fs;
|
||
|
|
- else
|
||
|
|
+ if (!(flags & EXT2_FLAG_NOFREE_ON_ERROR)) {
|
||
|
|
ext2fs_free(fs);
|
||
|
|
+ fs = NULL;
|
||
|
|
+ }
|
||
|
|
+ *ret_fs = fs;
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
diff --git a/resize/resize2fs.c b/resize/resize2fs.c
|
||
|
|
index 6b32bbf..a1fdefa 100644
|
||
|
|
--- a/resize/resize2fs.c
|
||
|
|
+++ b/resize/resize2fs.c
|
||
|
|
@@ -202,6 +202,7 @@ errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
|
||
|
|
rfs->flags = flags;
|
||
|
|
|
||
|
|
ext2fs_free(rfs->old_fs);
|
||
|
|
+ rfs->old_fs = NULL;
|
||
|
|
if (rfs->itable_buf)
|
||
|
|
ext2fs_free_mem(&rfs->itable_buf);
|
||
|
|
if (rfs->reserve_blocks)
|
||
|
|
@@ -213,8 +214,10 @@ errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
errout:
|
||
|
|
- if (rfs->new_fs)
|
||
|
|
+ if (rfs->new_fs) {
|
||
|
|
ext2fs_free(rfs->new_fs);
|
||
|
|
+ rfs->new_fs = NULL;
|
||
|
|
+ }
|
||
|
|
if (rfs->itable_buf)
|
||
|
|
ext2fs_free_mem(&rfs->itable_buf);
|
||
|
|
ext2fs_free_mem(&rfs);
|
||
|
|
--
|
||
|
|
1.8.3.1
|