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==38438==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x625000002100 at pc 0x000000567501 bp 0x7ffc5b95d2f0 sp 0x7ffc5b95d2e8
READ of size 1 at 0x625000002100 thread T0
#0 0x567500 in slaxLexer /home/seviezhou/libslax/build/libslax/../../libslax/slaxlexer.c:1107:13
#1 0x55f3a5 in slaxYylex /home/seviezhou/libslax/build/libslax/../../libslax/slaxlexer.c:1272:10
#2 0x579c59 in slaxParse /home/seviezhou/libslax/build/libslax/slaxparser.c:2447:16
#3 0x56df6e in slaxLoadFile /home/seviezhou/libslax/build/libslax/../../libslax/slaxloader.c:731:10
#4 0x524b1e in do_slax_to_xslt /home/seviezhou/libslax/build/slaxproc/../../slaxproc/slaxproc.c:156:9
#5 0x51f1d8 in main /home/seviezhou/libslax/build/slaxproc/../../slaxproc/slaxproc.c:1039:5
#6 0x7f8c73f1483f in __libc_start_main /build/glibc-e6zv40/glibc-2.23/csu/../csu/libc-start.c:291
#7 0x41d818 in _start (/home/seviezhou/libslax/build/slaxproc/slaxproc+0x41d818)
0x625000002100 is located 0 bytes to the right of 8192-byte region [0x625000000100,0x625000002100)
allocated by thread T0 here:
#0 0x4e1e90 in realloc /home/seviezhou/llvm-6.0.0/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:107
#1 0x55daf3 in slaxGetInput /home/seviezhou/libslax/build/libslax/../../libslax/slaxlexer.c:601:14
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/seviezhou/libslax/build/libslax/../../libslax/slaxlexer.c:1107:13 in slaxLexer
Shadow bytes around the buggy address:
0x0c4a7fff83d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4a7fff83e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4a7fff83f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4a7fff8400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4a7fff8410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c4a7fff8420:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fff8430: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fff8440: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fff8450: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fff8460: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fff8470: 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
==38438==ABORTING
System info
Ubuntu X64, gcc (Ubuntu 5.5.0-12ubuntu1), slaxproc (latest master 45d88a)
Configure
CFLAGS="-g -fsanitize=address" LDFLAGS="-fsanitize=address" ./configure
Command line
./build/slaxproc/slaxproc -o /dev/null -x @@
AddressSanitizer output
POC
heap-overflow-slaxLexer-slaxlexer-1107.zip
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