Stack overflow in fs.readdirSync causes fatal error

[joliss]

• Version: v9.5.0
• Platform: Linux sujin 4.4.0-101-generic # 124-Ubuntu SMP Fri Nov 10 18:29:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

The following code causes node to abort with FATAL ERROR on my system, when I would expect it to throw a "RangeError: Maximum call stack size exceeded" instead.

let fs = require("fs");
function f() {
  fs.readdirSync(".");
  f();
}
f();

$ node readdir-sync-bug.js
FATAL ERROR: v8::ToLocalChecked Empty MaybeLocal.
 1: node::Abort() [node]
 2: 0x8c807c [node]
 3: v8::Utils::ReportApiFailure(char const*, char const*) [node]
 4: 0x8fe7b6 [node]
 5: 0xf835c887147
Aborted (core dumped)

Running Node with GDB suggests that the problem is happening here:

#5  0x00000000008fe7b6 in node::ReadDir(v8::FunctionCallbackInfo<v8::Value> const&) ()

GDB output

$ gdb --args node readdir-sync-bug.js
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1
...
Reading symbols from node...done.
(gdb) run
Starting program: /home/ubuntu/.nvm/versions/node/v9.5.0/bin/node readdir-sync-bug.js
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff6b42700 (LWP 123862)]
[New Thread 0x7ffff6341700 (LWP 123863)]
[New Thread 0x7ffff5b40700 (LWP 123864)]
[New Thread 0x7ffff533f700 (LWP 123865)]
[New Thread 0x7ffff7ff5700 (LWP 123869)]
FATAL ERROR: v8::ToLocalChecked Empty MaybeLocal.
 1: node::Abort() [/home/ubuntu/.nvm/versions/node/v9.5.0/bin/node]
 2: 0x8c807c [/home/ubuntu/.nvm/versions/node/v9.5.0/bin/node]
 3: v8::Utils::ReportApiFailure(char const*, char const*) [/home/ubuntu/.nvm/versions/node/v9.5.0/bin/node]
 4: 0x8fe7b6 [/home/ubuntu/.nvm/versions/node/v9.5.0/bin/node]
 5: 0x2e361c207147

Thread 1 "node" received signal SIGABRT, Aborted.
0x00007ffff6b78428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
54	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x00007ffff6b78428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x00007ffff6b7a02a in __GI_abort () at abort.c:89
#2  0x00000000008c8041 in node::Abort() ()
#3  0x00000000008c807c in node::OnFatalError(char const*, char const*) ()
#4  0x0000000000a36085 in v8::Utils::ReportApiFailure(char const*, char const*) ()
#5  0x00000000008fe7b6 in node::ReadDir(v8::FunctionCallbackInfo<v8::Value> const&) ()
#6  0x00002e361c207147 in ?? ()
#7  0x00007ffffff07818 in ?? ()
#8  0x00007ffffff07860 in ?? ()
#9  0x0000000000000002 in ?? ()
#10 0x0000000002233b50 in ?? ()
#11 0x00002e361c207021 in ?? ()
#12 0x00007ffffff077d0 in ?? ()
#13 0x0000000000000006 in ?? ()
#14 0x00007ffffff078a0 in ?? ()
#15 0x00002e361c2075c1 in ?? ()
#16 0x0000020b35d02201 in ?? ()
#17 0x00000000021cd8e0 in ?? ()
#18 0x00001263620822d1 in ?? ()
#19 0x00001263620822d1 in ?? ()
#20 0x00000adadb40c5d1 in ?? ()
#21 0x00002e00b2d5e111 in ?? ()
#22 0x0000020b35d02239 in ?? ()
#23 0x00001263620822d1 in ?? ()
#24 0x00001263620822d1 in ?? ()
#25 0x00001263620834b1 in ?? ()
#26 0x0000020b35d02201 in ?? ()
#27 0x0000020b35d02201 in ?? ()
#28 0x00001263620822d1 in ?? ()
#29 0x0000000000000000 in ?? ()
(gdb)

[joyeecheung]

It's caused by the function returned bypush_values_to_array_function being called and then ToLocalChecked in C++ right away. I have a fix for readdirSync, but note that there are other synchronous APIs using that function this way and should be updated as well.

[littlekeith]

If I got hundred of thousands files in directory ?use thread with readdirSync?