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Ensure that Tiff's concept of Strip and Tilesize matches Pillow's

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Eric Soroos 2020-03-06 22:59:18 +00:00 committed by Hugo
parent c7f9e197aa
commit 6b842f4ec0
1 changed files with 18 additions and 1 deletions
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19
src/libImaging/TiffDecode.c
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@ -363,6 +363,13 @@ int ImagingLibTiffDecode(Imaging im, ImagingCodecState state, UINT8* buffer, Py_
state->bytes = row_byte_size * tile_length; state->bytes = row_byte_size * tile_length;
if (TIFFTileSize(tiff) > state->bytes) {
// If the strip size as expected by LibTiff isn't we're expecting, abort.
state->errcode = IMAGING_CODEC_MEMORY;
TIFFClose(tiff);
return -1;
}
/* realloc to fit whole tile */ /* realloc to fit whole tile */
/* malloc check above */ /* malloc check above */
new_data = realloc (state->buffer, state->bytes); new_data = realloc (state->buffer, state->bytes);
@ -424,11 +431,21 @@ int ImagingLibTiffDecode(Imaging im, ImagingCodecState state, UINT8* buffer, Py_
TIFFClose(tiff); TIFFClose(tiff);
return -1; return -1;
} }
state->bytes = rows_per_strip * row_byte_size; state->bytes = rows_per_strip * row_byte_size;
TRACE(("StripSize: %d \n", state->bytes)); TRACE(("StripSize: %d \n", state->bytes));
if (TIFFStripSize(tiff) > state->bytes) {
// If the strip size as expected by LibTiff isn't we're expecting, abort.
// man: TIFFStripSize returns the equivalent size for a strip of data as it would be returned in a
// call to TIFFReadEncodedStrip ...
state->errcode = IMAGING_CODEC_MEMORY;
TIFFClose(tiff);
return -1;
}
/* realloc to fit whole strip */ /* realloc to fit whole strip */
/* malloc check above */ /* malloc check above */
new_data = realloc (state->buffer, state->bytes); new_data = realloc (state->buffer, state->bytes);