lsblk: fix readlink() usage

Reported-by: Steve Grubb <sgrubb@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/misc-utils/lsblk.c b/misc-utils/lsblk.c
index b07bfb49a679dd935e50948541a376b5e8ec78ba..bbc94b5fc468a66d136a5a026705146a92439f87 100644 (file)
--- a/misc-utils/lsblk.c
+++ b/misc-utils/lsblk.c
@@ -768,7 +768,7 @@ static int process_one_device(char *devname)
 {
        struct blkdev_cxt parent = {}, cxt = {};
        struct stat st;
-       char buf[PATH_MAX];
+       char buf[PATH_MAX + 1];
        dev_t disk = 0;
 
        if (stat(devname, &st) || !S_ISBLK(st.st_mode)) {
@@ -795,7 +795,7 @@ static int process_one_device(char *devname)
                                    major(st.st_rdev), minor(st.st_rdev));
                diskname = xstrdup(buf);
 
-               len = readlink(path, buf, sizeof(buf));
+               len = readlink(path, buf, PATH_MAX);
                if (len < 0) {
                        warn(_("%s: failed to read link"), path);
                        return EXIT_FAILURE;