From f86cdab8d685ce5d2ea0d133c076611e3394c6c8 Mon Sep 17 00:00:00 2001
From: danblooomberg <dan.bloomberg@gmail.com>
Date: Mon, 29 Jan 2024 10:50:58 -0800
Subject: [PATCH] Fixed fuzzing issue #66279 (asan oss-fuzz in
 pixa_recog_fuzzer) * test for index before doing lookup in font and baseline
 tables

---
 src/bmf.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/bmf.c b/src/bmf.c
index 7cd311619..f03889a96 100644
--- a/src/bmf.c
+++ b/src/bmf.c
@@ -208,6 +208,8 @@ PIXA    *pixa;
         return NULL;
     if (!bmf)
         return (PIX *)ERROR_PTR("bmf not defined", __func__, NULL);
+    if (index < 32 || index >= 127)
+        return (PIX *)ERROR_PTR("invalid index", __func__, NULL);
 
     i = bmf->fonttab[index];
     if (i == UNDEF) {
@@ -245,6 +247,8 @@ PIXA    *pixa;
         return ERROR_INT("bmf not defined", __func__, 1);
     if ((index = (l_int32)chr) == 10)  /* NL */
         return 0;
+    if (index < 32 || index >= 127)
+        return ERROR_INT("invalid index", __func__, 1);
 
     i = bmf->fonttab[index];
     if (i == UNDEF) {
@@ -281,6 +285,8 @@ l_int32  bl, index;
         return ERROR_INT("bmf not defined", __func__, 1);
     if ((index = (l_int32)chr) == 10)  /* NL */
         return 0;
+    if (index < 32 || index >= 127)
+        return ERROR_INT("invalid index", __func__, 1);
 
     bl = bmf->baselinetab[index];
     if (bl == UNDEF) {