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authorFlorian Weimer <fweimer@redhat.com>2015-04-27 15:41:03 +0200
committerFlorian Weimer <fweimer@redhat.com>2015-04-27 16:19:55 +0200
commitcc8dcf96e71dd643f929e32150904cd6ad69efa8 (patch)
tree0711c094ad29df752a51ffff7120f7b48a945dfd
parent2dd6ee79b19ccfdd7f68cd534b8b71f77479132b (diff)
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test-skeleton: Support temporary files without memory leaks [BZ#18333]
add_temp_file now makes a copy which is freed by delete_temp_files. Callers to create_temp_file can now free the returned file name to avoid the memory leak. These changes do not affect the leak behavior of existing code. Also address a NULL pointer derefence in tzset after a memoru allocation failure, found during testing.
-rw-r--r--ChangeLog11
-rw-r--r--NEWS2
-rw-r--r--test-skeleton.c23
-rw-r--r--time/tzset.c7
4 files changed, 36 insertions, 7 deletions
diff --git a/ChangeLog b/ChangeLog
index 7d3e69e..373b12c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2015-04-27 Florian Weimer <fweimer@redhat.com>
+
+ [BZ#18333]
+ * time/tzset.c (parse_tzname): Return error on memory allocation
+ failure.
+ * test-skeleton.c (struct temp_name_list): Change type of name
+ member to non-const.
+ (add_temp_file): Create a copy of the file name.
+ (delete_temp_files): Deallocate memory.
+ (create_temp_file): Add comment.
+
2015-04-24 Florian Weimer <fweimer@redhat.com>
* io/posix_fallocate.c (posix_fallocate): Do not set errno.
diff --git a/NEWS b/NEWS
index 6408bed..72e15f5 100644
--- a/NEWS
+++ b/NEWS
@@ -16,7 +16,7 @@ Version 2.22
17967, 17969, 17978, 17987, 17991, 17996, 17998, 17999, 18019, 18020,
18029, 18030, 18032, 18036, 18038, 18039, 18042, 18043, 18046, 18047,
18068, 18080, 18093, 18100, 18104, 18110, 18111, 18128, 18138, 18185,
- 18197, 18206, 18210, 18211, 18247, 18287.
+ 18197, 18206, 18210, 18211, 18247, 18287, 18333.
* Cache information can be queried via sysconf() function on s390 e.g. with
_SC_LEVEL1_ICACHE_SIZE as argument.
diff --git a/test-skeleton.c b/test-skeleton.c
index 7a8ddfa..43fc236 100644
--- a/test-skeleton.c
+++ b/test-skeleton.c
@@ -73,7 +73,7 @@ static const char *test_dir;
struct temp_name_list
{
struct qelem q;
- const char *name;
+ char *name;
} *temp_name_list;
/* Add temporary files in list. */
@@ -83,14 +83,17 @@ add_temp_file (const char *name)
{
struct temp_name_list *newp
= (struct temp_name_list *) calloc (sizeof (*newp), 1);
- if (newp != NULL)
+ char *newname = strdup (name);
+ if (newp != NULL && newname != NULL)
{
- newp->name = name;
+ newp->name = newname;
if (temp_name_list == NULL)
temp_name_list = (struct temp_name_list *) &newp->q;
else
insque (newp, temp_name_list);
}
+ else
+ free (newp);
}
/* Delete all temporary files. */
@@ -100,11 +103,19 @@ delete_temp_files (void)
while (temp_name_list != NULL)
{
remove (temp_name_list->name);
- temp_name_list = (struct temp_name_list *) temp_name_list->q.q_forw;
+ free (temp_name_list->name);
+
+ struct temp_name_list *next
+ = (struct temp_name_list *) temp_name_list->q.q_forw;
+ free (temp_name_list);
+ temp_name_list = next;
}
}
-/* Create a temporary file. */
+/* Create a temporary file. Return the opened file descriptor on
+ success, or -1 on failure. Write the file name to *FILENAME if
+ FILENAME is not NULL. In this case, the caller is expected to free
+ *FILENAME. */
static int
__attribute__ ((unused))
create_temp_file (const char *base, char **filename)
@@ -132,6 +143,8 @@ create_temp_file (const char *base, char **filename)
add_temp_file (fname);
if (filename != NULL)
*filename = fname;
+ else
+ free (fname);
return fd;
}
diff --git a/time/tzset.c b/time/tzset.c
index d115bae..160f5ad 100644
--- a/time/tzset.c
+++ b/time/tzset.c
@@ -201,7 +201,12 @@ parse_tzname (const char **tzp, int whichrule)
if (*p++ != '>' || len < 3)
return false;
}
- tz_rules[whichrule].name = __tzstring_len (start, len);
+
+ const char *name = __tzstring_len (start, len);
+ if (name == NULL)
+ return false;
+ tz_rules[whichrule].name = name;
+
*tzp = p;
return true;
}