branch master updated: Fix afl-fuzz error

[Gavin D. Smith]

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gavin pushed a commit to branch master
in repository texinfo.

The following commit(s) were added to refs/heads/master by this push:
     new a11612f  Fix afl-fuzz error
a11612f is described below

commit a11612ff665391142fc8adb90796741cabb3b683
Author: Gavin Smith <gavinsmith0123@gmail.com>
AuthorDate: Thu May 6 20:30:54 2021 +0100

    Fix afl-fuzz error
    
    * info/info-utils.c (scan_reference_label): Avoid advancing
    pointer if we are already at the end of the buffer, in the case
    of a malformed input file.  Report from Nathaniel Beaver for file
    generated by afl-fuzz.
---
 ChangeLog         | 9 +++++++++
 info/info-utils.c | 3 ++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 1090ebf..3b82b45 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,15 @@
 2021-05-06  Gavin Smith  <gavinsmith0123@gmail.com>
 
        Fix afl-fuzz error
+       
+       * info/info-utils.c (scan_reference_label): Avoid advancing
+       pointer if we are already at the end of the buffer, in the case
+       of a malformed input file.  Report from Nathaniel Beaver for file
+       generated by afl-fuzz.
+
+2021-05-06  Gavin Smith  <gavinsmith0123@gmail.com>
+
+       Fix afl-fuzz error
 
        * info/info-utils.c (copy_input_to_output): Avoid calling
        copy_converting with negative argument in case of malformed
diff --git a/info/info-utils.c b/info/info-utils.c
index 998243f..e692183 100644
--- a/info/info-utils.c
+++ b/info/info-utils.c
@@ -1324,7 +1324,8 @@ scan_reference_label (REFERENCE *entry, int in_index)
     entry->end = inptr - input_start;
 
   /* Colon after label. */
-  skip_input (1);
+  if (*inptr)
+    skip_input (1);
   /* Don't mess up the margin of a menu description. */
   if (entry->type == REFERENCE_MENU_ITEM)
     write_extra_bytes_to_output (" ", 1);