[gnunet] branch master updated: fail nicely if encoded text would be way too large

[gnunet]

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grothoff pushed a commit to branch master
in repository gnunet.

The following commit(s) were added to refs/heads/master by this push:
     new 24433cf8d fail nicely if encoded text would be way too large
24433cf8d is described below

commit 24433cf8d1241991b5a264ef81dc26868b50b90e
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Sun Jul 18 14:51:32 2021 +0200

    fail nicely if encoded text would be way too large
---
 src/json/json_generator.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/json/json_generator.c b/src/json/json_generator.c
index 5806eb174..0c513ca9d 100644
--- a/src/json/json_generator.c
+++ b/src/json/json_generator.c
@@ -42,7 +42,14 @@ GNUNET_JSON_from_data (const void *data,
   char *buf;
   json_t *json;
 
-  buf = GNUNET_STRINGS_data_to_string_alloc (data, size);
+  if ((size * 8 + 4) / 5 + 1 >=
+      GNUNET_MAX_MALLOC_CHECKED)
+  {
+    GNUNET_break (0);
+    return NULL;
+  }
+  buf = GNUNET_STRINGS_data_to_string_alloc (data,
+                                             size);
   json = json_string (buf);
   GNUNET_free (buf);
   GNUNET_break (NULL != json);
@@ -201,5 +208,4 @@ GNUNET_JSON_from_rsa_signature (const struct 
GNUNET_CRYPTO_RsaSignature *sig)
 }
 
 
-
 /* End of json/json_generator.c */

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