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fixes crash-74d2

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This commit is contained in:
Eric Soroos 2021-03-31 21:04:59 +02:00
parent 4044ecc1fb
commit 45530d5ce1
3 changed files with 18 additions and 12 deletions
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BIN
Tests/images/crash-74d2a78403a5a59db1fb0a2b8735ac068a75f6e3.tif Normal file
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2
Tests/test_tiff_crashes.py
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@ -33,6 +33,8 @@ from .helper import on_ci
"Tests/images/crash-86214e58da443d2b80820cff9677a38a33dcbbca.tif",
"Tests/images/crash-f46f5b2f43c370fe65706c11449f567ecc345e74.tif",
"Tests/images/crash-63b1dffefc8c075ddc606c0a2f5fdc15ece78863.tif",
"Tests/images/crash-74d2a78403a5a59db1fb0a2b8735ac068a75f6e3.tif",
],
)
@pytest.mark.filterwarnings("ignore:Possibly corrupt EXIF data")

28
src/libImaging/TiffDecode.c
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@ -265,7 +265,7 @@ _decodeAsRGBA(Imaging im, ImagingCodecState state, TIFF *tiff) {
ret = TIFFGetFieldDefaulted(tiff, TIFFTAG_ROWSPERSTRIP, &rows_per_block);
}
if (ret != 1) {
if (ret != 1 || rows_per_block==(UINT32)(-1)) {
rows_per_block = state->ysize;
}
@ -281,17 +281,6 @@ _decodeAsRGBA(Imaging im, ImagingCodecState state, TIFF *tiff) {
img.req_orientation = ORIENTATION_TOPLEFT;
img.col_offset = 0;
if (state->xsize != img.width || state->ysize != img.height) {
TRACE(
("Inconsistent Image Error: %d =? %d, %d =? %d",
state->xsize,
img.width,
state->ysize,
img.height));
state->errcode = IMAGING_CODEC_BROKEN;
goto decodergba_err;
}
/* overflow check for row byte size */
if (INT_MAX / 4 < img.width) {
state->errcode = IMAGING_CODEC_MEMORY;
@ -559,6 +548,7 @@ ImagingLibTiffDecode(
uint16 planarconfig = 0;
int planes = 1;
ImagingShuffler unpackers[4];
UINT32 img_width, img_height;
memset(unpackers, 0, sizeof(ImagingShuffler) * 4);
@ -655,6 +645,20 @@ ImagingLibTiffDecode(
}
}
TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &img_width);
TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &img_height);
if (state->xsize != img_width || state->ysize != img_height) {
TRACE(
("Inconsistent Image Error: %d =? %d, %d =? %d",
state->xsize,
img_width,
state->ysize,
img_height));
state->errcode = IMAGING_CODEC_BROKEN;
goto decode_err;
}
TIFFGetField(tiff, TIFFTAG_PHOTOMETRIC, &photometric);
TIFFGetField(tiff, TIFFTAG_COMPRESSION, &compression);