2 files changed, 15 insertions, 1 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 32626ea3e227..348bed4a2abf 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -742,6 +742,17 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 
         argc = parse_options(argc, argv, options, report_usage, 0);
 
+        if (symbol_conf.vmlinux_name &&
+            access(symbol_conf.vmlinux_name, R_OK)) {
+                pr_err("Invalid file: %s\n", symbol_conf.vmlinux_name);
+                return -EINVAL;
+        }
+        if (symbol_conf.kallsyms_name &&
+            access(symbol_conf.kallsyms_name, R_OK)) {
+                pr_err("Invalid file: %s\n", symbol_conf.kallsyms_name);
+                return -EINVAL;
+        }
+
         if (report.use_stdio)
                 use_browser = 0;
         else if (report.use_tui)
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 504f2d73b7ee..48b588c6951a 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1132,8 +1132,11 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
         INIT_LIST_HEAD(&md.maps);
 
         fd = open(kcore_filename, O_RDONLY);
-        if (fd < 0)
+        if (fd < 0) {
+                pr_err("%s requires CAP_SYS_RAWIO capability to access.\n",
+                        kcore_filename);
                 return -EINVAL;
+        }
 
         /* Read new maps into temporary lists */
         err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md,