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==115877==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6200000080e0 at pc 0x000000756136 bp 0x7fff10b0da30 sp 0x7fff10b0da28
READ of size 2 at 0x6200000080e0 thread T0
#0 0x756135 in DCTStream::transformDataUnit(unsigned short*, int*, unsigned char*) /home/bupt/Desktop/xpdf/xpdf/Stream.cc:2968:17
#1 0x748741 in DCTStream::decodeImage() /home/bupt/Desktop/xpdf/xpdf/Stream.cc:2835:6
#2 0x7402bb in DCTStream::reset() /home/bupt/Desktop/xpdf/xpdf/Stream.cc:2261:5
#3 0x68912e in Object::streamReset() /home/bupt/Desktop/xpdf/xpdf/./Object.h:282:13
#4 0x68912e in Lexer::Lexer(XRef*, Object*) /home/bupt/Desktop/xpdf/xpdf/Lexer.cc:74:12
#5 0x581714 in Gfx::display(Object*, int) /home/bupt/Desktop/xpdf/xpdf/Gfx.cc:641:33
#6 0x6a76a1 in Page::displaySlice(OutputDev*, double, double, int, int, int, int, int, int, int, int, int (*)(void*), void*) /home/bupt/Desktop/xpdf/xpdf/Page.cc:360:10
#7 0x6d5f6e in PSOutputDev::checkPageSlice(Page*, double, double, int, int, int, int, int, int, int, int, int (*)(void*), void*) /home/bupt/Desktop/xpdf/xpdf/PSOutputDev.cc:3276:11
#8 0x6a7172 in Page::displaySlice(OutputDev*, double, double, int, int, int, int, int, int, int, int, int (*)(void*), void*) /home/bupt/Desktop/xpdf/xpdf/Page.cc:328:13
#9 0x6a6f81 in Page::display(OutputDev*, double, double, int, int, int, int, int (*)(void*), void*) /home/bupt/Desktop/xpdf/xpdf/Page.cc:308:3
#10 0x6af9b4 in PDFDoc::displayPage(OutputDev*, int, double, double, int, int, int, int, int (*)(void*), void*) /home/bupt/Desktop/xpdf/xpdf/PDFDoc.cc:384:27
#11 0x6af9b4 in PDFDoc::displayPages(OutputDev*, int, int, double, double, int, int, int, int, int (*)(void*), void*) /home/bupt/Desktop/xpdf/xpdf/PDFDoc.cc:397:5
#12 0x796d81 in main /home/bupt/Desktop/xpdf/xpdf/pdftops.cc:342:10
#13 0x7f57efb1ec86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
#14 0x41d5d9 in _start (/home/bupt/Desktop/xpdf/xpdf/pdftops+0x41d5d9)
Address 0x6200000080e0 is a wild pointer.
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/bupt/Desktop/xpdf/xpdf/Stream.cc:2968:17 in DCTStream::transformDataUnit(unsigned short*, int*, unsigned char*)
Shadow bytes around the buggy address:
0x0c407fff8fc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff8fd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff8fe0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff8ff0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff9000: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c407fff9010: fa fa fa fa fa fa fa fa fa fa fa fa[fa]fa fa fa
0x0c407fff9020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff9030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff9040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff9050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff9060: 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
Shadow gap: cc
==115877==ABORTING
Hi, in the lastest version of this code [ ps: commit id ffaf11c] I found something unusual.
crash sample
8id64_heap_buffer_overflow_in_transformDataUnit.zip
command to reproduce
./pdftops -q [crash sample] /dev/nullcrash detail