fix: use sane value for json_tokener max_depth

INT_MAX causes a NULL pointer if there is not enough memory available to
fit (INT_MAX * sizeof(struct json_tokener_srec)).

1 files changed, 6 insertions, 2 deletions

diff --git a/swaymsg/main.c b/swaymsg/main.c
index 3698294a..dcf42cb6 100644
--- a/swaymsg/main.c
+++ b/swaymsg/main.c
@@ -1,4 +1,8 @@
 #define _POSIX_C_SOURCE 200809L
+
+// arbitrary number, it's probably sufficient, higher number = more memory usage
+#define JSON_MAX_DEPTH 512
+
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -481,7 +485,7 @@ int main(int argc, char **argv) {
         char *resp = ipc_single_command(socketfd, type, command, &len);
 
         // pretty print the json
-        json_tokener *tok = json_tokener_new_ex(INT_MAX);
+        json_tokener *tok = json_tokener_new_ex(JSON_MAX_DEPTH);
         if (tok == NULL) {
                 sway_log(SWAY_ERROR, "failed allocating json_tokener");
                 ret = 1;
@@ -525,7 +529,7 @@ int main(int argc, char **argv) {
                                 break;
                         }
 
-                        json_tokener *tok = json_tokener_new_ex(INT_MAX);
+                        json_tokener *tok = json_tokener_new_ex(JSON_MAX_DEPTH);
                         if (tok == NULL) {
                                 sway_log(SWAY_ERROR, "failed allocating json_tokener");
                                 ret = 1;