UserAgent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0

Steps to reproduce the problem:
1. build latest code of filter_fuzz_stub with following gn flags:
is_debug = false
(ninja -C buildir skia:filter_fuzz_stub)
2. Run filter_fuzz_stub with attached file:
./filter_fuzz_stub  poc
==20325==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x00000233f71d bp 0x60800000ada0 sp 0x7ffde0cddd60 T0)
    #0 0x233f71c in Sprite_D32_S32A_Xfer::blitRect(int, int, int, int) ../../src/core/SkSpriteBlitter_ARGB32.cpp:77
    #1 0xd53ac7 in blitrect ../../src/core/SkScan.cpp:25
    #2 0xd53ac7 in SkScan::FillIRect(SkIRect const&, SkRegion const*, SkBlitter*) ../../src/core/SkScan.cpp:53
    #3 0xd54de1 in SkScan::FillIRect(SkIRect const&, SkRasterClip const&, SkBlitter*) ../../src/core/SkScan.cpp:83
    #4 0xab19f7 in SkDraw::drawSprite(SkBitmap const&, int, int, SkPaint const&) const ../../src/core/SkDraw.cpp:1325
    #5 0x21d10c2 in SkBitmapDevice::drawSprite(SkBitmap const&, int, int, SkPaint const&) ../../src/core/SkBitmapDevice.cpp:353
    #6 0x21d905f in SkBitmapDevice::drawSpecial(SkSpecialImage*, int, int, SkPaint const&, SkImage*, SkMatrix const&) ../../src/core/SkBitmapDevice.cpp:435
    #7 0x9cb9e5 in SkCanvas::internalDrawDevice(SkBaseDevice*, int, int, SkPaint const*, SkImage*, SkMatrix const&) ../../src/core/SkCanvas.cpp:1314
    #8 0x9cc631 in SkCanvas::internalRestore() ../../src/core/SkCanvas.cpp:1203
    #9 0x9dcd0c in AutoDrawLooper::~AutoDrawLooper() ../../src/core/SkCanvas.cpp:495
    #10 0x9dcd0c in SkCanvas::onDrawRect(SkRect const&, SkPaint const&) ../../src/core/SkCanvas.cpp:2018
    #11 0x9de430 in SkCanvas::drawRect(SkRect const&, SkPaint const&) ../../src/core/SkCanvas.cpp:1710
    #12 0x10cb499 in SkPaintImageFilter::onFilterImage(SkSpecialImage*, SkImageFilter::Context const&, SkIPoint*) const ../../src/effects/SkPaintImageFilter.cpp:66
    #13 0xb2d79e in SkImageFilter::filterImage(SkSpecialImage*, SkImageFilter::Context const&, SkIPoint*) const ../../src/core/SkImageFilter.cpp:213
    #14 0x21d6896 in SkBitmapDevice::drawSpecial(SkSpecialImage*, int, int, SkPaint const&, SkImage*, SkMatrix const&) ../../src/core/SkBitmapDevice.cpp:421
    #15 0x9cb9e5 in SkCanvas::internalDrawDevice(SkBaseDevice*, int, int, SkPaint const*, SkImage*, SkMatrix const&) ../../src/core/SkCanvas.cpp:1314
    #16 0x9cc631 in SkCanvas::internalRestore() ../../src/core/SkCanvas.cpp:1203
    #17 0x9cdf8b in AutoDrawLooper::~AutoDrawLooper() ../../src/core/SkCanvas.cpp:495
    #18 0x9efcc3 in SkCanvas::onDrawBitmap(SkBitmap const&, float, float, SkPaint const*) ../../src/core/SkCanvas.cpp:2291
    #19 0x9e7229 in SkCanvas::drawBitmap(SkBitmap const&, float, float, SkPaint const*) ../../src/core/SkCanvas.cpp:1831
    #20 0x666afc in fuzz_filter_fuzz ../../fuzz/fuzz.cpp:550
    #21 0x6691eb in fuzz_file ../../fuzz/fuzz.cpp:134
    #22 0x5cd616 in main ../../fuzz/fuzz.cpp:76
    #23 0x7f0a88abc82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #24 0x5e9918 in _start (/home/b/skia/out/asan/fuzz+0x5e9918)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV ../../src/core/SkSpriteBlitter_ARGB32.cpp:77 Sprite_D32_S32A_Xfer::blitRect(int, int, int, int)
==20325==ABORTING

What is the expected behavior?

What went wrong?
null pointer dereference 

Did this work before? N/A 

Chrome version: 65.0.3307.0  Channel: n/a
OS Version: 16.04
Flash Version:
 

Deleted: poc 372 bytes

poc 372 bytes View Download