Stack-buffer-overflow in jerryx_print_unhandled_exception (jerryscript/jerry-ext/util/print.c)

[paintedveil5]

JerryScript revision

0d49696
master

Build platform

Ubuntu 16.04.7 LTS (Linux 4.15.0-142-generic x86_64)

Build steps

./tools/build.py --clean --compile-flag=-fsanitize=address --lto=off --error-message=on --profile=es.next --stack-limit=15 --debug --logging=on --line-info=on

Test case

for (let __v1 = 0; __v1 < 10000; __v1++) {
    ['__v6', '__v2', '__v1', '__v3', '__v4', '__v5'];"    __v5(__v1, 
}

==112046==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffda03d5390 at pc 0x7fa6aae1ea7d bp 0x7ffda03d5240 sp 0x7ffda03d49e8
READ of size 1 at 0x7ffda03d5390 thread T0
    #0 0x7fa6aae1ea7c in __interceptor_strtol (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x75a7c)
    #1 0x581203 in jerryx_print_unhandled_exception /home/lily/Desktop/67/jerryscript/jerry-ext/util/print.c:247
    #2 0x4027c1 in main /home/lily/Desktop/67/jerryscript/jerry-main/main-desktop.c:172
    #3 0x7fa6aa6f683f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2083f)
    #4 0x401e88 in _start (/home/lily/Desktop/67/jerry+0x401e88)

Address 0x7ffda03d5390 is located in stack of thread T0 at offset 224 in frame
    #0 0x580e99 in jerryx_print_unhandled_exception /home/lily/Desktop/67/jerryscript/jerry-ext/util/print.c:204

  This frame has 3 object(s):
    [32, 36) 'source_size'
    [96, 104) 'current_p'
    [160, 224) 'buffer_p' <== Memory access at offset 224 overflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
      (longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow ??:0 __interceptor_strtol
Shadow bytes around the buggy address:
  0x100034072a20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100034072a30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100034072a40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100034072a50: 00 00 00 00 00 00 f1 f1 f1 f1 04 f4 f4 f4 f2 f2
  0x100034072a60: f2 f2 00 f4 f4 f4 f2 f2 f2 f2 00 00 00 00 00 00
=>0x100034072a70: 00 00[f3]f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00
  0x100034072a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100034072a90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100034072aa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100034072ab0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100034072ac0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
==112046==ABORTING

[zherczeg]

The exception printing did not detect the end of stream. You can also increase the printing buffer size from 63 byte if you need these longer messages.