92 lines
2.9 KiB
Diff
92 lines
2.9 KiB
Diff
From fb7db9ae3e8ac271651d1884a3611d30bac04a98 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
|
|
Date: Tue, 9 Jul 2024 12:11:37 +0300
|
|
Subject: [PATCH 1/2] Use vasprintf() if available for error messages and
|
|
otherwise vsnprintf()
|
|
|
|
vasprintf() is a GNU/BSD extension and would allocate as much memory as required
|
|
on the heap, similar to g_strdup_printf(). It's ridiculous that such a function
|
|
is still not provided as part of standard C.
|
|
|
|
If it's not available, use vsnprintf() to at least avoid stack/heap buffer
|
|
overflows, which can lead to arbitrary code execution.
|
|
|
|
Thanks to Noriko Totsuka for reporting.
|
|
|
|
Fixes JVN#02030803 / JPCERT#92912620 / CVE-2024-40897
|
|
Fixes #69
|
|
|
|
Part-of: <https://gitlab.freedesktop.org/gstreamer/orc/-/merge_requests/191>
|
|
---
|
|
meson.build | 1 +
|
|
orc/orccompiler.c | 7 +++++--
|
|
orc/orcparse.c | 14 ++++++++++----
|
|
3 files changed, 16 insertions(+), 6 deletions(-)
|
|
|
|
diff --git a/meson.build b/meson.build
|
|
index d83441c..4b6c225 100644
|
|
--- a/meson.build
|
|
+++ b/meson.build
|
|
@@ -128,6 +128,7 @@ int main() {
|
|
'''
|
|
cdata.set('HAVE_MONOTONIC_CLOCK', cc.compiles(monotonic_test))
|
|
cdata.set('HAVE_GETTIMEOFDAY', cc.has_function('gettimeofday'))
|
|
+cdata.set('HAVE_VASPRINTF', cc.has_function('vasprintf'))
|
|
cdata.set('HAVE_POSIX_MEMALIGN', cc.has_function('posix_memalign', prefix : '#include <stdlib.h>'))
|
|
cdata.set('HAVE_MMAP', cc.has_function('mmap'))
|
|
cdata.set('HAVE_SYS_TIME_H', cc.has_header('sys/time.h'))
|
|
diff --git a/orc/orccompiler.c b/orc/orccompiler.c
|
|
index 94d06d3..b3152e7 100644
|
|
--- a/orc/orccompiler.c
|
|
+++ b/orc/orccompiler.c
|
|
@@ -1331,9 +1331,12 @@ orc_compiler_error_valist (OrcCompiler *compiler, const char *fmt,
|
|
char *s;
|
|
|
|
if (compiler->error_msg) return;
|
|
-
|
|
+#ifdef HAVE_VASPRINTF
|
|
+ vasprintf (&s, fmt, args);
|
|
+#else
|
|
s = malloc (ORC_COMPILER_ERROR_BUFFER_SIZE);
|
|
- vsprintf (s, fmt, args);
|
|
+ vsnprintf (s, ORC_COMPILER_ERROR_BUFFER_SIZE, fmt, args);
|
|
+#endif
|
|
compiler->error_msg = s;
|
|
compiler->error = TRUE;
|
|
compiler->result = ORC_COMPILE_RESULT_UNKNOWN_COMPILE;
|
|
diff --git a/orc/orcparse.c b/orc/orcparse.c
|
|
index b0d6709..8888de4 100644
|
|
--- a/orc/orcparse.c
|
|
+++ b/orc/orcparse.c
|
|
@@ -424,17 +424,23 @@ orc_parse_get_error_where (OrcParser *parser)
|
|
static void
|
|
orc_parse_add_error_valist (OrcParser *parser, const char *format, va_list args)
|
|
{
|
|
- char text[ORC_ERROR_LENGTH] = { '\0' };
|
|
-
|
|
if (parser->error_program != parser->program) {
|
|
parser->error_program = parser->program;
|
|
}
|
|
-
|
|
- vsprintf (text, format, args);
|
|
+#ifdef HAVE_VASPRINTF
|
|
+ char *text;
|
|
+ vasprintf (&text, format, args);
|
|
+#else
|
|
+ char text[ORC_ERROR_LENGTH] = { '\0' };
|
|
+ vsnprintf (text, sizeof (text), format, args);
|
|
+#endif
|
|
|
|
orc_vector_append (&parser->errors,
|
|
orc_parse_error_new (orc_parse_get_error_where (parser),
|
|
parser->line_number, -1, text));
|
|
+#ifdef HAVE_VASPRINTF
|
|
+ free (text);
|
|
+#endif
|
|
}
|
|
|
|
static void
|
|
--
|
|
2.27.0
|
|
|