Fix buffer underrun noted and solved by Larry Doolittle.

diff --git a/coreutils/dirname.c b/coreutils/dirname.c
index 8313e99c692c26af3ec34578da561b08acdcde2e..935a8313c406d2e8ff646940a7c5ed6a2b954166 100644 (file)
--- a/coreutils/dirname.c
+++ b/coreutils/dirname.c
@@ -37,7 +37,7 @@ extern int dirname_main(int argc, char **argv)
        argv++;
 
        s=*argv+strlen(*argv)-1;
-       while (s != *argv && *s == '/') {
+       while (s > *argv && *s == '/') {
                *s-- = '\0';
        }
        s = strrchr(*argv, '/');

diff --git a/dirname.c b/dirname.c
index 8313e99c692c26af3ec34578da561b08acdcde2e..935a8313c406d2e8ff646940a7c5ed6a2b954166 100644 (file)
--- a/dirname.c
+++ b/dirname.c
@@ -37,7 +37,7 @@ extern int dirname_main(int argc, char **argv)
        argv++;
 
        s=*argv+strlen(*argv)-1;
-       while (s != *argv && *s == '/') {
+       while (s > *argv && *s == '/') {
                *s-- = '\0';
        }
        s = strrchr(*argv, '/');