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fix crash by checking len(v) before accessing v[0]

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This commit is contained in:
Kenny Ostrom 2014-08-21 15:58:01 -05:00
parent 7158894042
commit 398b1174b1
1 changed files with 4 additions and 2 deletions
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6
PIL/TiffImagePlugin.py
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@ -1122,14 +1122,16 @@ def _save(im, fp, filename):
# save(load('')) == original file. # save(load('')) == original file.
for k, v in itertools.chain(ifd.items(), for k, v in itertools.chain(ifd.items(),
getattr(im, 'ifd', {}).items()): getattr(im, 'ifd', {}).items()):
# all adobe defined tags are < 1024
if k not in atts and k not in blocklist and k < 1024: if k not in atts and k not in blocklist and k < 1024:
if type(v[0]) == tuple and len(v) > 1: # check len(v) before accessing elements
if len(v) > 1 and type(v[0]) == tuple:
# A tuple of more than one rational tuples # A tuple of more than one rational tuples
# flatten to floats, # flatten to floats,
# following tiffcp.c->cpTag->TIFF_RATIONAL # following tiffcp.c->cpTag->TIFF_RATIONAL
atts[k] = [float(elt[0])/float(elt[1]) for elt in v] atts[k] = [float(elt[0])/float(elt[1]) for elt in v]
continue continue
if type(v[0]) == tuple and len(v) == 1: if len(v) == 1 and type(v[0]) == tuple:
# A tuple of one rational tuples # A tuple of one rational tuples
# flatten to floats, # flatten to floats,
# following tiffcp.c->cpTag->TIFF_RATIONAL # following tiffcp.c->cpTag->TIFF_RATIONAL