yasm: fix CVE-2023-31975

yasm v1.3.0 was discovered to contain a memory leak via the function
yasm_intnum_copy at /libyasm/intnum.c.

References:
https://nvd.nist.gov/vuln/detail/CVE-2023-31975
https://github.com/yasm/yasm/issues/210

Upstream patches:
https://github.com/yasm/yasm/commit/b2cc5a1693b17ac415df76d0795b15994c106441

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 30 insertions, 0 deletions

diff --git a/meta-oe/recipes-devtools/yasm/yasm/CVE-2023-31975.patch b/meta-oe/recipes-devtools/yasm/yasm/CVE-2023-31975.patch
new file mode 100644
index 0000000000..ae10e99c2f
--- /dev/null
+++ b/meta-oe/recipes-devtools/yasm/yasm/CVE-2023-31975.patch
@@ -0,0 +1,29 @@
+From b2cc5a1693b17ac415df76d0795b15994c106441 Mon Sep 17 00:00:00 2001
+From: Katsuhiko Gondow <gondow@cs.titech.ac.jp>
+Date: Tue, 13 Jun 2023 05:00:47 +0900
+Subject: [PATCH] Fix memory leak in bin-objfmt (#231)
+
+Upstream-Status: Backport [https://github.com/yasm/yasm/commit/b2cc5a1693b17ac415df76d0795b15994c106441]
+
+CVE: CVE-2023-31975
+---
+ modules/objfmts/bin/bin-objfmt.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/modules/objfmts/bin/bin-objfmt.c b/modules/objfmts/bin/bin-objfmt.c
+index 18026750..a38c3422 100644
+--- a/modules/objfmts/bin/bin-objfmt.c
++++ b/modules/objfmts/bin/bin-objfmt.c
+@@ -1680,6 +1680,10 @@ static void
+ bin_section_data_destroy(void *data)
+ {
+     bin_section_data *bsd = (bin_section_data *)data;
++    if (bsd->align)
++        yasm_xfree(bsd->align);
++    if (bsd->valign)
++        yasm_xfree(bsd->valign);
+     if (bsd->start)
+         yasm_expr_destroy(bsd->start);
+     if (bsd->vstart)
+--
+2.40.0
diff --git a/meta-oe/recipes-devtools/yasm/yasm_git.bb b/meta-oe/recipes-devtools/yasm/yasm_git.bb
index 044fcbea74..5c3562300b 100644
--- a/meta-oe/recipes-devtools/yasm/yasm_git.bb
+++ b/meta-oe/recipes-devtools/yasm/yasm_git.bb
@@ -11,6 +11,7 @@ PV = "1.3.0+git${SRCPV}"
 SRCREV = "ba463d3c26c0ece2e797b8d6381b161633b5971a"
 SRC_URI = "git://github.com/yasm/yasm.git;branch=master;protocol=https \
            file://0001-Do-not-use-AC_HEADER_STDC.patch \
+           file://CVE-2023-31975.patch \
 "
 
 S = "${WORKDIR}/git"