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divide by zero and "value inf is outside the range of representable values of type 'int'" #19

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asarubbo opened this issue May 10, 2017 · 1 comment
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divide by zero and "value inf is outside the range of representable values of type 'int'" #19

asarubbo opened this issue May 10, 2017 · 1 comment

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@asarubbo
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On 1.3.1 with -fsanitize=undefined:

# imagew $FILE /tmp/out -outfmt bmp
$FILE -> /tmp/out
src/imagew-cmd.c:850:46: runtime error: division by zero
SUMMARY: AddressSanitizer: undefined-behavior src/imagew-cmd.c:850:46 in 
src/imagew-cmd.c:850:29: runtime error: value inf is outside the range of representable values of type 'int'
SUMMARY: AddressSanitizer: undefined-behavior src/imagew-cmd.c:850:29 in 
Resizing: 16387x57 -> 16387x1

Reproducer:
https://github.com/asarubbo/poc/blob/master/00278-imageworsener-fpe-outside-int
jsummers added a commit that referenced this issue May 15, 2017
@jsummers
Double-check that the input image's density is valid
dc49c80 
Fixes a bug that could result in division by zero, at least for a JPEG
source image.
Fixes issues #19, #20
@jsummers
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Should be fixed by commit dc49c80.

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@jsummers @asarubbo