File 0001-tpm_version-avoid-outputting-undefined-data-on-stder.patch of Package tpm-tools

From f0f30ff3e3b08751ebb8524303d80b6e94882134 Mon Sep 17 00:00:00 2001
From: Matthias Gerstner <matthias.gerstner@suse.de>
Date: Fri, 30 Nov 2018 13:17:01 +0100
Subject: [PATCH] tpm_version: avoid outputting undefined data on stderr

If there was no data written to the temporary file then memsize == 1, no
data will be read from the file into the buffer and the buffer will not
be null terminated. This can cause random data to be output later on to
the original stderr like:

'#precedence ::ffff:0:0/'

or

'xl?8?'

Fix this by making sure the buffer is always zero terminated.
---
 src/tpm_mgmt/tpm_version.c | 3 +++
 1 file changed, 3 insertions(+)

Index: tpm-tools-1.3.9.1/src/tpm_mgmt/tpm_version.c
===================================================================
--- tpm-tools-1.3.9.1.orig/src/tpm_mgmt/tpm_version.c
+++ tpm-tools-1.3.9.1/src/tpm_mgmt/tpm_version.c
@@ -99,6 +99,9 @@ char* end_capture_stderr(int olderr)
     perror("read()");
   }
 
+  // make sure the buffer is null terminated.
+  buf[st.st_size] = '\0';
+
   // Restore stderr.
  errout:
   if (0 > dup2(olderr, STDERR_FILENO)) {