[SECURITY PATCH 024/117] gnulib/regcomp: Fix uninitialized token structure

[Daniel Kiper]

From: Darren Kenny <darren.kenny@oracle.com>

The code is assuming that the value of br_token.constraint was
initialized to zero when it wasn't.

While some compilers will ensure that, not all do, so it is better to
fix this explicitly than leave it to chance.

Fixes: CID 73749

Signed-off-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 bootstrap.conf                                          |  2 +-
 conf/Makefile.extra-dist                                |  1 +
 grub-core/lib/gnulib-patches/fix-uninit-structure.patch | 11 +++++++++++
 3 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 grub-core/lib/gnulib-patches/fix-uninit-structure.patch

diff --git a/bootstrap.conf b/bootstrap.conf
index 4c8c37c16..a7fc34eb3 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -79,7 +79,7 @@ cp -a INSTALL INSTALL.grub
 
 bootstrap_post_import_hook () {
   set -e
-  for patchname in fix-base64 fix-null-deref fix-unused-value fix-width 
no-abort; do
+  for patchname in fix-base64 fix-null-deref fix-uninit-structure 
fix-unused-value fix-width no-abort; do
     patch -d grub-core/lib/gnulib -p2 \
       < "grub-core/lib/gnulib-patches/$patchname.patch"
   done
diff --git a/conf/Makefile.extra-dist b/conf/Makefile.extra-dist
index 0d3b74e8e..d83cde427 100644
--- a/conf/Makefile.extra-dist
+++ b/conf/Makefile.extra-dist
@@ -30,6 +30,7 @@ EXTRA_DIST += grub-core/genemuinitheader.sh
 
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-base64.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-null-deref.patch
+EXTRA_DIST += grub-core/lib/gnulib-patches/fix-uninit-structure.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-unused-value.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-width.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/no-abort.patch
diff --git a/grub-core/lib/gnulib-patches/fix-uninit-structure.patch 
b/grub-core/lib/gnulib-patches/fix-uninit-structure.patch
new file mode 100644
index 000000000..7b4d9f67a
--- /dev/null
+++ b/grub-core/lib/gnulib-patches/fix-uninit-structure.patch
@@ -0,0 +1,11 @@
+--- a/lib/regcomp.c    2020-10-22 13:49:06.770168928 +0000
++++ b/lib/regcomp.c    2020-10-22 13:50:37.026528298 +0000
+@@ -3662,7 +3662,7 @@
+   Idx alloc = 0;
+ #endif /* not RE_ENABLE_I18N */
+   reg_errcode_t ret;
+-  re_token_t br_token;
++  re_token_t br_token = {0};
+   bin_tree_t *tree;
+ 
+   sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1);
-- 
2.11.0