$ ./jsish/jsish poc.js
==88163==ERROR: AddressSanitizer: heap-use-after-free on address 0x602000001bf0 at pc 0x7f8c725b9733 bp 0x7ffeb1c188d0 sp 0x7ffeb1c18078
READ of size 11 at 0x602000001bf0 thread T0
#0 0x7f8c725b9732 (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x79732)#1 0x5576fd6ba249 in memcpy /usr/include/x86_64-linux-gnu/bits/string_fortified.h:34#2 0x5576fd6ba249 in Jsi_StrdupLen src/jsiChar.c:74#3 0x5576fd6c8ac0 in StringConstructor src/jsiString.c:35#4 0x5576fd6a3818 in jsi_FuncCallSub src/jsiProto.c:244#5 0x5576fd96d71a in jsiFunctionSubCall src/jsiEval.c:796#6 0x5576fd96d71a in jsiEvalFunction src/jsiEval.c:837#7 0x5576fd96d71a in jsiEvalCodeSub src/jsiEval.c:1264#8 0x5576fd98115e in jsi_evalcode src/jsiEval.c:2204#9 0x5576fd985274 in jsi_evalStrFile src/jsiEval.c:2665#10 0x5576fd67466a in Jsi_Main src/jsiInterp.c:936#11 0x5576fde7903a in jsi_main src/main.c:47#12 0x7f8c719afbf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6)#13 0x5576fd608969 in _start (/usr/local/bin/jsish+0xe8969)
0x602000001bf0 is located 0 bytes inside of 12-byte region [0x602000001bf0,0x602000001bfc)
freed by thread T0 here:
#0 0x7f8c7261e7a8 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xde7a8)#1 0x5576fd6c8c19 in StringConstructor src/jsiString.c:33
previously allocated by thread T0 here:
#0 0x7f8c7261eb40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)#1 0x5576fd679a22 in Jsi_Malloc src/jsiUtils.c:52
SUMMARY: AddressSanitizer: heap-use-after-free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x79732)
Shadow bytes around the buggy address:
0x0c047fff8320: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
0x0c047fff8330: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
0x0c047fff8340: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
0x0c047fff8350: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
0x0c047fff8360: fa fa fd fd fa fa fd fd fa fa 07 fa fa fa fd fd
=>0x0c047fff8370: fa fa 00 07 fa fa 00 00 fa fa 00 04 fa fa[fd]fd
0x0c047fff8380: fa fa 00 04 fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8390: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff83a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff83b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff83c0: 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
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
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
Left alloca redzone: ca
Right alloca redzone: cb
==88163==ABORTING
The text was updated successfully, but these errors were encountered:
Jsish revision
Commit: 9fa798e
Version: v3.5.0
Build platform
Ubuntu 18.04.5 LTS (Linux 5.4.0-44-generic x86_64)
Build steps
Test case
Execution steps & Output
$ ./jsish/jsish poc.js ==88163==ERROR: AddressSanitizer: heap-use-after-free on address 0x602000001bf0 at pc 0x7f8c725b9733 bp 0x7ffeb1c188d0 sp 0x7ffeb1c18078 READ of size 11 at 0x602000001bf0 thread T0 #0 0x7f8c725b9732 (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x79732) #1 0x5576fd6ba249 in memcpy /usr/include/x86_64-linux-gnu/bits/string_fortified.h:34 #2 0x5576fd6ba249 in Jsi_StrdupLen src/jsiChar.c:74 #3 0x5576fd6c8ac0 in StringConstructor src/jsiString.c:35 #4 0x5576fd6a3818 in jsi_FuncCallSub src/jsiProto.c:244 #5 0x5576fd96d71a in jsiFunctionSubCall src/jsiEval.c:796 #6 0x5576fd96d71a in jsiEvalFunction src/jsiEval.c:837 #7 0x5576fd96d71a in jsiEvalCodeSub src/jsiEval.c:1264 #8 0x5576fd98115e in jsi_evalcode src/jsiEval.c:2204 #9 0x5576fd985274 in jsi_evalStrFile src/jsiEval.c:2665 #10 0x5576fd67466a in Jsi_Main src/jsiInterp.c:936 #11 0x5576fde7903a in jsi_main src/main.c:47 #12 0x7f8c719afbf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6) #13 0x5576fd608969 in _start (/usr/local/bin/jsish+0xe8969) 0x602000001bf0 is located 0 bytes inside of 12-byte region [0x602000001bf0,0x602000001bfc) freed by thread T0 here: #0 0x7f8c7261e7a8 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xde7a8) #1 0x5576fd6c8c19 in StringConstructor src/jsiString.c:33 previously allocated by thread T0 here: #0 0x7f8c7261eb40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40) #1 0x5576fd679a22 in Jsi_Malloc src/jsiUtils.c:52 SUMMARY: AddressSanitizer: heap-use-after-free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x79732) Shadow bytes around the buggy address: 0x0c047fff8320: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd 0x0c047fff8330: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd 0x0c047fff8340: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd 0x0c047fff8350: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd 0x0c047fff8360: fa fa fd fd fa fa fd fd fa fa 07 fa fa fa fd fd =>0x0c047fff8370: fa fa 00 07 fa fa 00 00 fa fa 00 04 fa fa[fd]fd 0x0c047fff8380: fa fa 00 04 fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff8390: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff83a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff83b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff83c0: 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 Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 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 Left alloca redzone: ca Right alloca redzone: cb ==88163==ABORTINGThe text was updated successfully, but these errors were encountered: