From: Collin Funk <collin.funk1@gmail.com>
Date: Sun, 14 Sep 2025 05:59:05 +0000 (-0700)
Subject: basenc: fix an uninitialized index when decoding an empty file
X-Git-Tag: v9.8~56
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f4dcc2a495c390296296ad262b5a71996d0f6a86;p=thirdparty%2Fcoreutils.git

basenc: fix an uninitialized index when decoding an empty file

* src/basenc.c (base64_decode_ctx_init_wrapper)
(base64url_decode_ctx_init_wrapper)
(base32_decode_ctx_init_wrapper)
(base32hex_decode_ctx_init_wrapper): Initialize ctx->i to zero.
Fixes https://bugs.gnu.org/79444
---

diff --git a/src/basenc.c b/src/basenc.c
index 5976b1aa68..49740a47b1 100644
--- a/src/basenc.c
+++ b/src/basenc.c
@@ -393,6 +393,7 @@ static void
 base64_decode_ctx_init_wrapper (struct base_decode_context *ctx)
 {
   base64_decode_ctx_init (&ctx->ctx.base64);
+  ctx->i = 0;
 }
 
 static bool
@@ -449,6 +450,7 @@ static void
 base64url_decode_ctx_init_wrapper (struct base_decode_context *ctx)
 {
   base64_decode_ctx_init (&ctx->ctx.base64);
+  ctx->i = 0;
   init_inbuf (ctx);
 }
 
@@ -497,6 +499,7 @@ static void
 base32_decode_ctx_init_wrapper (struct base_decode_context *ctx)
 {
   base32_decode_ctx_init (&ctx->ctx.base32);
+  ctx->i = 0;
 }
 
 static bool
@@ -576,6 +579,7 @@ static void
 base32hex_decode_ctx_init_wrapper (struct base_decode_context *ctx)
 {
   base32_decode_ctx_init (&ctx->ctx.base32);
+  ctx->i = 0;
   init_inbuf (ctx);
 }