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-rw-r--r--tools/perf/util/symbol.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 164286ace7d..7707897b59f 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1764,6 +1764,11 @@ int symbol__init(void)
if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0)
return -1;
+ if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
+ pr_err("'.' is the only non valid --field-separator argument\n");
+ return -1;
+ }
+
if (setup_list(&symbol_conf.dso_list,
symbol_conf.dso_list_str, "dso") < 0)
return -1;