[Pkg-wmaker-commits] [wmfsm] 51/83: debian/patches: (handle_HOME_errors.patch) Avoid errors related to HOME environment variable.

[Doug Torrance]

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dtorrance-guest pushed a commit to branch master
in repository wmfsm.

commit c6ad1f5c24d120801b37262e9818ceb086946f93
Author: Doug Torrance <dtorrance at monmouthcollege.edu>
Date:   Thu Jan 22 14:39:46 2015 -0600

    debian/patches: (handle_HOME_errors.patch) Avoid errors related to HOME
    environment variable.
---
 debian/patches/handle_HOME_errors.patch | 36 +++++++++++++++++++++++++++++++++
 debian/patches/series                   |  1 +
 2 files changed, 37 insertions(+)

diff --git a/debian/patches/handle_HOME_errors.patch b/debian/patches/handle_HOME_errors.patch
new file mode 100644
index 0000000..d64ee99
--- /dev/null
+++ b/debian/patches/handle_HOME_errors.patch
@@ -0,0 +1,36 @@
+Description: Handle errors related to the HOME environment variable.
+ In particular, if HOME is undefined, then a segmentation fault will occur.
+ Also, if HOME is at least 245 characters, then a buffer overflow will occur.
+ We check for these conditions and exit with an error message instead.
+Author: Doug Torrance <dtorrance at monmouthcollege.edu>
+Last-Update: 2015-01-22
+
+--- a/wmfsm/wmfsm.c
++++ b/wmfsm/wmfsm.c
+@@ -565,6 +565,7 @@
+ {
+ 	char confFileName[255];
+ 	char workString[255];
++	char *home;
+ 	int i, j, exnumberfs = 0;
+ 	int excluded, finalnumberfs = 0;
+ 	char *mount_points[100];
+@@ -572,7 +573,17 @@
+ 	int include = -1;
+ 	int included = 0;
+ 
+-	strncpy(confFileName, (char *) getenv("HOME"), 245);
++	home = getenv("HOME");
++	if (home == NULL) {
++		fprintf(stderr, "error: HOME must be defined\n");
++		exit(1);
++	}
++	if (strlen(home) > 244) {
++		fprintf(stderr,
++			"error: HOME may not be longer than 244 characters\n");
++		exit(1);
++	}
++	strncpy(confFileName, home, 245);
+ 	strcat(confFileName, "/.wmfsmrc");
+ 	confFile = fopen(confFileName, "r");
+ 	if (confFile) {
diff --git a/debian/patches/series b/debian/patches/series
new file mode 100644
index 0000000..0534357
--- /dev/null
+++ b/debian/patches/series
@@ -0,0 +1 @@
+handle_HOME_errors.patch

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