cc: Only try to list ksyms if we're root

e-dant · Apr 20, 2016 · 6b59b2c · 6b59b2c
1 parent f088bbf
commit 6b59b2c
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/src/cc/bcc_proc.c b/src/cc/bcc_proc.c
@@ -111,8 +111,13 @@ int bcc_procutils_each_module(int pid, bcc_procutils_modulecb callback,
 
 int bcc_procutils_each_ksym(bcc_procutils_ksymcb callback, void *payload) {
  char line[2048];
- FILE *kallsyms = fopen("/proc/kallsyms", "r");
+ FILE *kallsyms;
 
+ /* root is needed to list ksym addresses */
+ if (geteuid() != 0)
+ return -1;
+
+ kallsyms = fopen("/proc/kallsyms", "r");
  if (!kallsyms)
  return -1;