From 3244e7ddb0bef2dd7ccd2e6331fa1c62c3f35d28 Mon Sep 17 00:00:00 2001
From: Qualys Security Advisory <qsa@qualys.com>
Date: Thu, 1 Jan 1970 00:00:00 +0000
Subject: [PATCH] proc/devname.c: Never write more than "chop" (part 2).

"chop" is the maximum offset where the null-byte should be written;
respect this even if about to write just one (non-null) character.
---
 proc/devname.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/proc/devname.c b/proc/devname.c
index 08ed131d..368548a9 100644
--- a/proc/devname.c
+++ b/proc/devname.c
@@ -341,7 +341,7 @@ unsigned dev_to_tty(char *restrict ret, unsigned chop, dev_t dev_t_dev, int pid,
   if(  link_name(tmp, MAJOR_OF(dev), MINOR_OF(dev), pid, "fd/255")) goto abbrev;
   // fall through if unable to find a device file
 no_tty:
-  strcpy(ret, "?");
+  strcpy(ret, chop >= 1 ? "?" : "");
   return 1;
 abbrev:
   if((flags&ABBREV_DEV) && !strncmp(tmp,"/dev/",5) && tmp[5]) tmp += 5;