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master 117795a059: Fix possible null pointer access


From: Gerd Moellmann
Subject: master 117795a059: Fix possible null pointer access
Date: Sun, 18 Sep 2022 01:46:28 -0400 (EDT)

branch: master
commit 117795a0594d1b4fc1c267311d789b0255ac6291
Author: Gerd Möllmann <gerd@gnu.org>
Commit: Gerd Möllmann <gerd@gnu.org>

    Fix possible null pointer access
    
    * src/term.c (Ftty__output_buffer_size): Handle case of
    decode_tty_terminal returning NULL.
---
 src/term.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/term.c b/src/term.c
index 231324d002..f8104e0304 100644
--- a/src/term.c
+++ b/src/term.c
@@ -2433,7 +2433,9 @@ A value of zero means TTY uses the system's default 
value.  */)
   (Lisp_Object tty)
 {
   struct terminal *terminal = decode_tty_terminal (tty);
-  return make_fixnum (terminal->display_info.tty->output_buffer_size);
+  if (terminal)
+    return make_fixnum (terminal->display_info.tty->output_buffer_size);
+  error ("Not a tty terminal");
 }
 
 



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