Issue #5808 has been updated by knu (Akinori MUSHA).


Oj and Yajl have no cycle detection or depth limit either.

Maybe it's worth contacting authors of all known JSON libraries, probably via the multi_json project.
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Bug #5808: "a = []; a << a; puts JSON.dump(a)" aborted
https://bugs.ruby-lang.org/issues/5808#change-41268

Author: akr (Akira Tanaka)
Status: Assigned
Priority: Normal
Assignee: naruse (Yui NARUSE)
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2011-12-26 trunk 34127) [x86_64-linux]
Backport: 


???? a = []; a << a; puts JSON.dump(a) ???????????????abort ?????????????

% ./ruby -rjson -ve 'a = []; a << a; puts JSON.dump(a)'
ruby 2.0.0dev (2011-12-26 trunk 34127) [x86_64-linux]
/home/ruby/tcstate/lib/ruby/1.9.1/json/common.rb:216: stack level too deep (SystemStackError)
*** glibc detected *** ./ruby: double free or corruption (out): 0x00007fd5c0c18240 ***
======= Backtrace: =========
/lib/libc.so.6(+0x71ad6)[0x7fd5bdf81ad6]
/lib/libc.so.6(cfree+0x6c)[0x7fd5bdf8684c]
./ruby(+0x14053d)[0x7fd5bf0b253d]
./ruby(ruby_vm_destruct+0x66)[0x7fd5bf0b1e68]
./ruby(ruby_cleanup+0x386)[0x7fd5bef9401f]
./ruby(ruby_run_node+0x45)[0x7fd5bef941e5]
./ruby(+0x2088d)[0x7fd5bef9288d]
/lib/libc.so.6(__libc_start_main+0xfd)[0x7fd5bdf2ec4d]
./ruby(+0x20749)[0x7fd5bef92749]
======= Memory map: ========
7fd5b8000000-7fd5b8021000 rw-p 00000000 00:00 0 
7fd5b8021000-7fd5bc000000 ---p 00000000 00:00 0 
7fd5bcaf3000-7fd5bcb09000 r-xp 00000000 08:01 6627331                    /lib/libgcc_s.so.1
7fd5bcb09000-7fd5bcd08000 ---p 00016000 08:01 6627331                    /lib/libgcc_s.so.1
7fd5bcd08000-7fd5bcd09000 rw-p 00015000 08:01 6627331                    /lib/libgcc_s.so.1
7fd5bcd09000-7fd5bcd11000 r-xp 00000000 08:01 14934439                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/json/ext/generator.so
7fd5bcd11000-7fd5bcf10000 ---p 00008000 08:01 14934439                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/json/ext/generator.so
7fd5bcf10000-7fd5bcf11000 rw-p 00007000 08:01 14934439                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/json/ext/generator.so
7fd5bcf11000-7fd5bcf12000 r-xp 00000000 08:01 14934499                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_32le.so
7fd5bcf12000-7fd5bd112000 ---p 00001000 08:01 14934499                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_32le.so
7fd5bd112000-7fd5bd113000 rw-p 00001000 08:01 14934499                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_32le.so
7fd5bd113000-7fd5bd114000 r-xp 00000000 08:01 14934502                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_32be.so
7fd5bd114000-7fd5bd314000 ---p 00001000 08:01 14934502                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_32be.so
7fd5bd314000-7fd5bd315000 rw-p 00001000 08:01 14934502                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_32be.so
7fd5bd315000-7fd5bd317000 r-xp 00000000 08:01 14934492                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_16le.so
7fd5bd317000-7fd5bd516000 ---p 00002000 08:01 14934492                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_16le.so
7fd5bd516000-7fd5bd517000 rw-p 00001000 08:01 14934492                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_16le.so
7fd5bd517000-7fd5bd519000 r-xp 00000000 08:01 14934483                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_16be.so
7fd5bd519000-7fd5bd718000 ---p 00002000 08:01 14934483                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_16be.so
7fd5bd718000-7fd5bd719000 rw-p 00001000 08:01 14934483                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/utf_16be.so
7fd5bd719000-7fd5bd720000 r-xp 00000000 08:01 14934440                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/json/ext/parser.so
7fd5bd720000-7fd5bd91f000 ---p 00007000 08:01 14934440                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/json/ext/parser.so
7fd5bd91f000-7fd5bd920000 rw-p 00006000 08:01 14934440                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/json/ext/parser.so
7fd5bd920000-7fd5bd922000 r-xp 00000000 08:01 14934465                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/trans/transdb.so
7fd5bd922000-7fd5bdb22000 ---p 00002000 08:01 14934465                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/trans/transdb.so
7fd5bdb22000-7fd5bdb23000 rw-p 00002000 08:01 14934465                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/trans/transdb.so
7fd5bdb23000-7fd5bdb25000 r-xp 00000000 08:01 14934498                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/encdb.so
7fd5bdb25000-7fd5bdd24000 ---p 00002000 08:01 14934498                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/encdb.so
7fd5bdd24000-7fd5bdd25000 rw-p 00001000 08:01 14934498                   /home/ruby/tcstate/lib/ruby/1.9.1/x86_64-linux/enc/encdb.so
7fd5bdd25000-7fd5bdf10000 r--p 00000000 08:01 18989057                   /usr/lib/locale/locale-archive
7fd5bdf10000-7fd5be068000 r-xp 00000000 08:01 6627339                    /lib/libc-2.11.2.so
7fd5be068000-7fd5be267000 ---p 00158000 08:01 6627339                    /lib/libc-2.11.2.so
7fd5be267000-7fd5be26b000 r--p 00157000 08:01 6627339                    /lib/libc-2.11.2.so
7fd5be26b000-7fd5be26c000 rw-p 0015b000 08:01 6627339                    /lib/libc-2.11.2.so
7fd5be26c000-7fd5be271000 rw-p 00000000 00:00 0 
7fd5be271000-7fd5be2f1000 r-xp 00000000 08:01 6627348                    /lib/libm-2.11.2.so
7fd5be2f1000-7fd5be4f1000 ---p 00080000 08:01 6627348                    /lib/libm-2.11.2.so
7fd5be4f1000-7fd5be4f2000 r--p 00080000 08:01 6627348                    /lib/libm-2.11.2.so
7fd5be4f2000-7fd5be4f3000 rw-p 00081000 08:01 6627348                    /lib/libm-2.11.2.so
7fd5be4f3000-7fd5be4fb000 r-xp 00000000 08:01 6627350                    /lib/libcrypt-2.11.2.so
7fd5be4fb000-7fd5be6fa000 ---p 00008000 08:01 6627350                    /lib/libcrypt-2.11.2.so
7fd5be6fa000-7fd5be6fb000 r--p 00007000 08:01 6627350                    /lib/libcrypt-2.11.2.so
7fd5be6fb000-7fd5be6fc000 rw-p 00008000 08:01 6627350                    /lib/libcrypt-2.11.2.so
7fd5be6fc000-7fd5be72a000 rw-p 00000000 00:00 0 
7fd5be72a000-7fd5be72c000 r-xp 00000000 08:01 6627338                    /lib/libdl-2.11.2.so
7fd5be72c000-7fd5be92c000 ---p 00002000 08:01 6627338                    /lib/libdl-2.11.2.so
7fd5be92c000-7fd5be92d000 r--p 00002000 08:01 6627338                    /lib/libdl-2.11.2.so
7fd5be92d000-7fd5be92e000 rw-p 00003000 08:01 6627338                    /lib/libdl-2.11.2.so
7fd5be92e000-7fd5be935000 r-xp 00000000 08:01 6627341                    /lib/librt-2.11.2.so
7fd5be935000-7fd5beb34000 ---p 00007000 08:01 6627341                    /lib/librt-2.11.2.so
7fd5beb34000-7fd5beb35000 r--p 00006000 08:01 6627341                    /lib/librt-2.11.2.so
7fd5beb35000-7fd5beb36000 rw-p 00007000 08:01 6627341                    /lib/librt-2.11.2.so
7fd5beb36000-7fd5beb4d000 r-xp 00000000 08:01 6627340                    /lib/libpthread-2.11.2.so
7fd5beb4d000-7fd5bed4c000 ---p 00017000 08:01 6627340                    /lib/libpthread-2.11.2.so
7fd5bed4c000-7fd5bed4d000 r--p 00016000 08:01 6627340                    /lib/libpthread-2.11.2.so
7fd5bed4d000-7fd5bed4e000 rw-p 00017000 08:01 6627340                    /lib/libpthread-2.11.2.so
7fd5bed4e000-7fd5bed52000 rw-p 00000000 00:00 0 
7fd5bed52000-7fd5bed70000 r-xp 00000000 08:01 6627351                    /lib/ld-2.11.2.so
7fd5bef57000-7fd5bef5c000 rw-p 00000000 00:00 0 
7fd5bef68000-7fd5bef69000 rw-p 00000000 00:00 0 
7fd5bef69000-7fd5bef6a000 ---p 00000000 00:00 0 
7fd5bef6a000-7fd5bef6f000 rw-p 00000000 00:00 0 
7fd5bef6f000-7fd5bef70000 r--p 0001d000 08:01 6627351                    /lib/ld-2.11.2.so
7fd5bef70000-7fd5bef71000 rw-p 0001e000 08:01 6627351                    /lib/ld-2.11.2.so
7fd5bef71000-7fd5bef72000 rw-p 00000000 00:00 0 
7fd5bef72000-7fd5bf1ad000 r-xp 00000000 08:01 14797288                   /home/ruby/tcstate/ruby/ruby
7fd5bf3ac000-7fd5bf3b2000 rw-p 0023a000 08:01 14797288                   /home/ruby/tcstate/ruby/ruby
7fd5bf3b2000-7fd5bf3d0000 rw-p 00000000 00:00 0 
7fd5c0bb3000-7fd5c0efa000 rw-p 00000000 00:00 0                          [heap]
7fffaca6b000-7fffad26a000 rw-p 00000000 00:00 0                          [stack]
7fffad3ff000-7fffad400000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]
zsh: abort      ./ruby -rjson -ve 'a = []; a << a; puts JSON.dump(a)'




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