From 85ab9deb9808add099e8564b80244698e5649852 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sun, 28 Feb 2021 02:03:11 +0100
Subject: [PATCH] avcodec/exr: handle case when |im - IM| == 1 for huff
 compression

---
 libavcodec/exr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/exr.c b/libavcodec/exr.c
index 5f99d9d5ab..4559174ba2 100644
--- a/libavcodec/exr.c
+++ b/libavcodec/exr.c
@@ -420,6 +420,11 @@ static int huf_build_dec_table(EXRContext *s,
             td->run_sym = i;
     }
 
+    if (im > 0)
+        td->run_sym = 0;
+    else if (iM < 65535)
+        td->run_sym = 65535;
+
     if (td->run_sym == -1) {
         avpriv_request_sample(s->avctx, "No place for run symbol");
         return AVERROR_PATCHWELCOME;