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From 9d36bce5d516b6379ba3a0dd1a94a9c035838827 Mon Sep 17 00:00:00 2001
From: Darren Kenny <darren.kenny@oracle.com>
Date: Wed, 21 Oct 2020 14:41:27 +0000
Subject: [PATCH] gnulib/regexec: Resolve unused variable
This is a really minor issue where a variable is being assigned to but
not checked before it is overwritten again.
The reason for this issue is that we are not building with DEBUG set and
this in turn means that the assert() that reads the value of the
variable match_last is being processed out.
The solution, move the assignment to match_last in to an ifdef DEBUG too.
Fixes: CID 292459
Signed-off-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=a983d36bd9178d377d2072fd4b11c635fdc404b4]
Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
---
conf/Makefile.extra-dist | 1 +
.../lib/gnulib-patches/fix-unused-value.patch | 14 ++++++++++++++
2 files changed, 15 insertions(+)
create mode 100644 grub-core/lib/gnulib-patches/fix-unused-value.patch
diff --git a/conf/Makefile.extra-dist b/conf/Makefile.extra-dist
index 46c4e95..9b01152 100644
--- a/conf/Makefile.extra-dist
+++ b/conf/Makefile.extra-dist
@@ -29,6 +29,7 @@ EXTRA_DIST += grub-core/genemuinit.sh
EXTRA_DIST += grub-core/genemuinitheader.sh
EXTRA_DIST += grub-core/lib/gnulib-patches/fix-null-deref.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-unused-value.patch b/grub-core/lib/gnulib-patches/fix-unused-value.patch
new file mode 100644
index 0000000..ba51f1b
--- /dev/null
+++ b/grub-core/lib/gnulib-patches/fix-unused-value.patch
@@ -0,0 +1,14 @@
+--- a/lib/regexec.c 2020-10-21 14:25:35.310195912 +0000
++++ b/lib/regexec.c 2020-10-21 14:32:07.961765604 +0000
+@@ -828,7 +828,11 @@
+ break;
+ if (__glibc_unlikely (err != REG_NOMATCH))
+ goto free_return;
++#ifdef DEBUG
++ /* Only used for assertion below when DEBUG is set, otherwise
++ it will be over-written when we loop around. */
+ match_last = -1;
++#endif
+ }
+ else
+ break; /* We found a match. */
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