LU-2227 build: fix 'memory illegal access' errors

[fs/lustre-release.git] / lustre / utils / mount_utils_ldiskfs.c

diff --git a/lustre/utils/mount_utils_ldiskfs.c b/lustre/utils/mount_utils_ldiskfs.c
index 15e7048..b8efddc 100644 (file)
--- a/lustre/utils/mount_utils_ldiskfs.c
+++ b/lustre/utils/mount_utils_ldiskfs.c
@@ -287,7 +287,7 @@ static int file_in_dev(char *file_name, char *dev_name)
                pclose(fp);
                return 1;
        }
-       i = fread(debugfs_cmd, 1, sizeof(debugfs_cmd), fp);
+       i = fread(debugfs_cmd, 1, sizeof(debugfs_cmd) - 1, fp);
        if (i) {
                debugfs_cmd[i] = 0;
                fprintf(stderr, "%s", debugfs_cmd);
@@ -346,7 +346,8 @@ static int is_e2fsprogs_feature_supp(const char *feature)
                        fprintf(stderr, "%s: %s\n", progname, strerror(errno));
                        return 0;
                }
-               ret = fread(supp_features, 1, sizeof(supp_features), fp);
+               ret = fread(supp_features, 1, sizeof(supp_features) - 1, fp);
+               supp_features[ret] = '\0';
                fclose(fp);
        }
        if (ret > 0 && strstr(supp_features,
@@ -1104,6 +1105,7 @@ static int is_feature_enabled(const char *feature, const char *devpath)
        char cmd[PATH_MAX];
        FILE *fp;
        char enabled_features[4096] = "";
+       int ret = 1;
 
        snprintf(cmd, sizeof(cmd), "%s -R features %s 2>&1",
                 DEBUGFS, devpath);
@@ -1116,7 +1118,8 @@ static int is_feature_enabled(const char *feature, const char *devpath)
                return 0;
        }
 
-       fread(enabled_features, 1, sizeof(enabled_features), fp);
+       ret = fread(enabled_features, 1, sizeof(enabled_features) - 1, fp);
+       enabled_features[ret] = '\0';
        fclose(fp);
 
        if (strstr(enabled_features, feature))