From 29d44a236a5e939b8ff24e6c31141d5b1e48f693 Mon Sep 17 00:00:00 2001
From: Darren Kenny <darren.kenny@oracle.com>
Date: Tue, 26 Oct 2021 15:02:40 +0000
Subject: io/gzio: Fix possible use of uninitialized variable in huft_build()

In huft_build() it is possible to reach the for loop where "r" is being
assigned to "q[j]" without "r.v" ever being initialized.

Fixes: CID 314024

Signed-off-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

Conflict: NA
Reference: https://git.savannah.gnu.org/cgit/grub.git/commit?id=29d44a236a5e939b8ff24e6c31141d5b1e48f693

---
 grub-core/io/gzio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grub-core/io/gzio.c b/grub-core/io/gzio.c
index aea86a0..10156e5 100644
--- a/grub-core/io/gzio.c
+++ b/grub-core/io/gzio.c
@@ -447,7 +447,7 @@ huft_build (unsigned *b,	/* code lengths in bits (all assumed <= BMAX) */
   int l;			/* bits per table (returned in m) */
   register unsigned *p;		/* pointer into c[], b[], or v[] */
   register struct huft *q;	/* points to current table */
-  struct huft r;		/* table entry for structure assignment */
+  struct huft r = {0};		/* table entry for structure assignment */
   struct huft *u[BMAX];		/* table stack */
   unsigned v[N_MAX];		/* values in order of bit length */
   register int w;		/* bits before this table == (l * h) */
-- 
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