ofz#71606 don't ignore CRCs when fuzzing

got a case similar to

https://github.com/pnggroup/libpng/issues/587

with a backtrace of:

/work/workdir/UnpackedTarball/libpng/png.c:1475:23: runtime error: signed integer overflow: -1703155269 - 692774662 cannot be represented in type 'png_fixed_point' (aka 'int')
#0 0x59bbf901eab0 in png_XYZ_from_xy /work/workdir/UnpackedTarball/libpng/png.c:1475:23
#1 0x59bbf901eab0 in png_colorspace_check_xy /work/workdir/UnpackedTarball/libpng/png.c:1610:13
#2 0x59bbf901d8bc in png_colorspace_set_chromaticities /work/workdir/UnpackedTarball/libpng/png.c:1717:12
#3 0x59bbf9046855 in png_handle_cHRM /work/workdir/UnpackedTarball/libpng/pngrutil.c:1302:10
#4 0x59bbf902d064 in png_read_info /work/workdir/UnpackedTarball/libpng/pngread.c:175:10
#5 0x59bbf7c331d6 in (anonymous namespace)::reader(SvStream&, Graphic&, GraphicFilterImportFlags, BitmapScopedWriteAccess*, BitmapScopedWriteAccess*) /src/libreoffice/vcl/source/filter/png/PngImageReader.cxx:404:5
#6 0x59bbf7c36960 in read /src/libreoffice/vcl/source/filter/png/PngImageReader.cxx:845:55
#7 0x59bbf7c36960 in vcl::PngImageReader::read() /src/libreoffice/vcl/source/filter/png/PngImageReader.cxx:850:5
#8 0x59bbf786fe57 in LLVMFuzzerTestOneInput /src/libreoffice/vcl/workben/pngfuzzer.cxx:52:19

(gdb) print *xy
$1 = {
redx = 9,
redy = 131616,
greenx = 598048,
greeny = 538976288,
bluex = 0,
bluey = 151551,
whitex = 538976288,
whitey = 538976288
}

but not reproducible with a typical utility because we're unusually
ignoring crc errors for fuzzing so reenable those and see if a testcase
can be generated anyway.

Change-Id: Ifc050ee082800906b087609154ec29ca39cd8fe6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/173409
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>

0 files changed, 0 insertions, 0 deletions