gentoo-overlay/app-crypt/cryptkeeper/files/cryptkeeper-0.9.5-is_mounted_overflow_fix.patch

commit 86b960a528df7118ab43b629bbd906db7459300d
Author: Jon Dowland <jmtd@debian.org>
Date:   Sun May 22 12:48:39 2011 +0100

    fix is_mounted (memory leaks and NULL access)
    
    Ensure that the return of realpath is checked for NULL before
    access.  Ensure that the return value is free'd before it falls
    out of scope.  Related tidying up.

diff --git a/src/encfs_wrapper.cpp b/src/encfs_wrapper.cpp
index 347337b..961818b 100644
--- a/src/encfs_wrapper.cpp
+++ b/src/encfs_wrapper.cpp
@@ -33,24 +33,24 @@
 
 bool is_mounted(const char *mount_dir)
 {
+	struct mntent *m;
 	FILE *f = setmntent("/etc/mtab", "r");
- 	char *mount_dir_expanded = realpath(mount_dir, NULL);
-	if (mount_dir_expanded == NULL) {
-		// no such file or dir, ...
-		// so: not mounted
-		//	  perror("cryptkeeper, is_mounted");
+ 	char *mount_dir_expanded, *mnt_dir_expanded;
+
+	if (!(mount_dir_expanded = realpath(mount_dir, NULL)))
 		return false;
-	}
-	for (;;) {
- 	        char *mnt_dir_expanded;
-		struct mntent *m = getmntent(f);
-		if (!m) break;
- 		mnt_dir_expanded = realpath(m->mnt_dir, NULL);
- 		if (strcmp(mount_dir_expanded, mnt_dir_expanded)==0) {
+
+	while(m = getmntent(f)) {
+ 	        if(mnt_dir_expanded = realpath(m->mnt_dir, NULL)) {
+			if (strcmp(mount_dir_expanded, mnt_dir_expanded)==0) {
+				free(mnt_dir_expanded);
+				free(mount_dir_expanded);
+				return true;
+			}
 			free(mnt_dir_expanded);
- 			return true;
- 		}
+		}
 	}
+	free(mount_dir_expanded);
 	return false;
 }