database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-07-29 08:01:23 +03:00
Code Activity

Limit the depth of recursion for valid JSON in the JSON1 extension in order

Browse Source 
to avoid using excess stack space in the recursive descent parser.
Fix for ticket [981329adeef51011052667a9].

FossilOrigin-Name: 1f68c184596912d742b50b1ca38252a9e783aacf121619a27b17a7ae9f6df041
This commit is contained in:
drh
2017-04-11 18:55:05 +00:00
parent e97c9ff49a
commit ff6d50e973
4 changed files with 49 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
test/json101.test
View File

@ -688,5 +688,29 @@ do_execsql_test json-10.95 {
SELECT json_valid('" \~ "');
} {0}
#--------------------------------------------------------------------------
# 2017-04-11. https://www.sqlite.org/src/info/981329adeef51011
# Stack overflow on deeply nested JSON.
#
# The following tests confirm that deeply nested JSON is considered invalid.
#
do_execsql_test json-11.0 {
/* Shallow enough to be parsed */
SELECT json_valid(printf('%.2000c0%.2000c','[',']'));
} {1}
do_execsql_test json-11.1 {
/* Too deep by one */
SELECT json_valid(printf('%.2001c0%.2001c','[',']'));
} {0}
do_execsql_test json-11.2 {
/* Shallow enough to be parsed { */
SELECT json_valid(replace(printf('%.2000c0%.2000c','[','}'),'[','{"a":'));
/* } */
} {1}
do_execsql_test json-11.3 {
/* Too deep by one { */
SELECT json_valid(replace(printf('%.2001c0%.2001c','[','}'),'[','{"a":'));
/* } */
} {0}
finish_test