From bf3364d56678ae12892168d1ee22ac4e13ef80a3 Mon Sep 17 00:00:00 2001
From: carrerasdarren-cell
 <283775510+carrerasdarren-cell@users.noreply.github.com>
Date: Wed, 15 Jul 2026 16:33:47 -0400
Subject: [PATCH] Return on a stalled non-blocking gzprintf write

---
 gzwrite.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gzwrite.c b/gzwrite.c
index b5026e5fad..9d34d76c22 100644
--- a/gzwrite.c
+++ b/gzwrite.c
@@ -444,6 +444,7 @@ int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va) {
                a Z_BUF_ERROR to let the application know that this gzprintf()
                needs to be retried. */
             gz_error(state, Z_BUF_ERROR, "stalled write on gzprintf");
+            return state->err;
         }
         if (!state->again)
             return state->err;
@@ -552,6 +553,7 @@ int ZEXPORTVA gzprintf(gzFile file, const char *format, int a1, int a2, int a3,
                a Z_BUF_ERROR to let the application know that this gzprintf()
                needs to be retried. */
             gz_error(state, Z_BUF_ERROR, "stalled write on gzprintf");
+            return state->err;
         }
         if (!state->again)
             return state->err;