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cesanta / mjs

Embedded JavaScript engine for C/C++
https://mongoose-os.com
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SEGV (/usr/local/bin/mjs+0x8d28e) #211

Open hope-fly opened 2 years ago

hope-fly commented 2 years ago
mJS revision

Commit: b1b6eac

Build platform

Ubuntu 18.04.5 LTS (Linux 5.4.0-44-generic x86_64)

Build steps
vim Makefile
DOCKER_GCC=gcc
$(DOCKER_GCC) $(CFLAGS) $(TOP_MJS_SOURCES) $(TOP_COMMON_SOURCES) -o $(PROG)
# save the makefile then make
make
Test case
poc.js 


```javascript
JSON.parse--("0xA") !== JSON.parse("0xA")
```
Execution steps & Output
$ ./mjs/build/mjs poc.js
ASAN:DEADLYSIGNAL
=================================================================
==2607==ERROR: AddressSanitizer: SEGV on unknown address 0x55f3104c021c (pc 0x55f3104c028f bp 0x000000000043 sp 0x7ffcbbf96e98 T0)
==2607==The signal is caused by a WRITE memory access.
    #0 0x55f3104c028e  (/usr/local/bin/mjs+0x8d28e)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/usr/local/bin/mjs+0x8d28e)
==2607==ABORTING