Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

SEGV src/mjs_exec.c:823 in mjs_execute #206

Open
hope-fly opened this issue Dec 31, 2021 · 0 comments
Open

SEGV src/mjs_exec.c:823 in mjs_execute #206

hope-fly opened this issue Dec 31, 2021 · 0 comments

Comments

@hope-fly
Copy link

hope-fly commented Dec 31, 2021

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

function JSEtest() {
    let arr = [1];
    arr.splice((arr.splice(0, 17)= [1])= [1])= [1]
}
JSEtest();

Execution steps & Output
$ ./mjs/build/mjs poc.js
ASAN:DEADLYSIGNAL
=================================================================
==23867==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x55dcd2425950 bp 0x000000000000 sp 0x7fff558e7b00 T0)
==23867==The signal is caused by a READ memory access.
==23867==Hint: address points to the zero page.
    #0 0x55dcd242594f in mjs_execute src/mjs_exec.c:823
    #1 0x55dcd2430a05 in mjs_exec_internal src/mjs_exec.c:1073
    #2 0x55dcd2430a05 in mjs_exec_file src/mjs_exec.c:1096
    #3 0x55dcd23ed909 in main src/mjs_main.c:47
    #4 0x7f63f4c54b96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #5 0x55dcd23ee449 in _start (/usr/local/bin/mjs+0xe449)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV src/mjs_exec.c:823 in mjs_execute

Credits: Found by OWL337 team.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

1 participant