$ ./jsish/jsish poc.js
=====ERROR: AddressSanitizer: heap-use-after-free on address 0x602000001cf3 at pc 0x7fae379c366e bp 0x7ffdcb94e5a0 sp 0x7ffdcb94dd48
READ of size 2 at 0x602000001cf3 thread T0
#0 0x7fae379c366d (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x5166d)#1 0x55927a403f60 in Jsi_Strlen src/jsiChar.c:29#2 0x55927a508a57 in Jsi_DSAppendLen src/jsiDString.c:99#3 0x55927a508e7f in Jsi_DSAppend src/jsiDString.c:129#4 0x55927a40d4b8 in StringReplaceCmd src/jsiString.c:705#5 0x55927a3ed818 in jsi_FuncCallSub src/jsiProto.c:244#6 0x55927a6b771a in jsiFunctionSubCall src/jsiEval.c:796#7 0x55927a6b771a in jsiEvalFunction src/jsiEval.c:837#8 0x55927a6b771a in jsiEvalCodeSub src/jsiEval.c:1264#9 0x55927a6cb15e in jsi_evalcode src/jsiEval.c:2204#10 0x55927a6cf274 in jsi_evalStrFile src/jsiEval.c:2665#11 0x55927a3be66a in Jsi_Main src/jsiInterp.c:936#12 0x55927abc303a in jsi_main src/main.c:47#13 0x7fae36de1bf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6)#14 0x55927a352969 in _start (/usr/local/bin/jsish+0xe8969)
0x602000001cf4 is located 0 bytes to the right of 4-byte region [0x602000001cf0,0x602000001cf4)
freed by thread T0 here:
#0 0x7fae37a507a8 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xde7a8)#1 0x55927a412c19 in StringConstructor src/jsiString.c:33
previously allocated by thread T0 here:
#0 0x7fae37a50b40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)#1 0x55927a3c3a22 in Jsi_Malloc src/jsiUtils.c:52
SUMMARY: AddressSanitizer: heap-use-after-free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x5166d)
Shadow bytes around the buggy address:
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 fa fa fa 00 00 fa fa 00 00
0x0c047fff8380: fa fa 00 00 fa fa 00 00 fa fa 00 00 fa fa 00 00
=>0x0c047fff8390: fa fa 00 00 fa fa fd fa fa fa fd fa fa fa[fd]fa
0x0c047fff83a0: fa fa fd fa fa fa 04 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
0x0c047fff83d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff83e0: 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
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 =====ERROR: AddressSanitizer: heap-use-after-free on address 0x602000001cf3 at pc 0x7fae379c366e bp 0x7ffdcb94e5a0 sp 0x7ffdcb94dd48 READ of size 2 at 0x602000001cf3 thread T0 #0 0x7fae379c366d (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x5166d) #1 0x55927a403f60 in Jsi_Strlen src/jsiChar.c:29 #2 0x55927a508a57 in Jsi_DSAppendLen src/jsiDString.c:99 #3 0x55927a508e7f in Jsi_DSAppend src/jsiDString.c:129 #4 0x55927a40d4b8 in StringReplaceCmd src/jsiString.c:705 #5 0x55927a3ed818 in jsi_FuncCallSub src/jsiProto.c:244 #6 0x55927a6b771a in jsiFunctionSubCall src/jsiEval.c:796 #7 0x55927a6b771a in jsiEvalFunction src/jsiEval.c:837 #8 0x55927a6b771a in jsiEvalCodeSub src/jsiEval.c:1264 #9 0x55927a6cb15e in jsi_evalcode src/jsiEval.c:2204 #10 0x55927a6cf274 in jsi_evalStrFile src/jsiEval.c:2665 #11 0x55927a3be66a in Jsi_Main src/jsiInterp.c:936 #12 0x55927abc303a in jsi_main src/main.c:47 #13 0x7fae36de1bf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6) #14 0x55927a352969 in _start (/usr/local/bin/jsish+0xe8969) 0x602000001cf4 is located 0 bytes to the right of 4-byte region [0x602000001cf0,0x602000001cf4) freed by thread T0 here: #0 0x7fae37a507a8 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xde7a8) #1 0x55927a412c19 in StringConstructor src/jsiString.c:33 previously allocated by thread T0 here: #0 0x7fae37a50b40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40) #1 0x55927a3c3a22 in Jsi_Malloc src/jsiUtils.c:52 SUMMARY: AddressSanitizer: heap-use-after-free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x5166d) Shadow bytes around the buggy address: 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 fa fa fa 00 00 fa fa 00 00 0x0c047fff8380: fa fa 00 00 fa fa 00 00 fa fa 00 00 fa fa 00 00 =>0x0c047fff8390: fa fa 00 00 fa fa fd fa fa fa fd fa fa fa[fd]fa 0x0c047fff83a0: fa fa fd fa fa fa 04 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 0x0c047fff83d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff83e0: 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: cbThe text was updated successfully, but these errors were encountered: