1 files changed, 7 insertions, 0 deletions

diff --git a/plugins/check_swap.d/swap.c b/plugins/check_swap.d/swap.c
index ba8c6439..2fe4544f 100644
--- a/plugins/check_swap.d/swap.c
+++ b/plugins/check_swap.d/swap.c
@@ -69,6 +69,13 @@ swap_result getSwapFromProcMeminfo(char proc_meminfo[]) {
         swap_result result = {0};
         result.errorcode = STATE_UNKNOWN;
 
+        if (meminfo_file_ptr == NULL) {
+                // failed to open meminfo file
+                // errno should contain an error
+                result.errorcode = STATE_UNKNOWN;
+                return result;
+        }
+
         uint64_t swap_total = 0;
         uint64_t swap_used = 0;
         uint64_t swap_free = 0;