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Use strncpy to avoid buffer overflow

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Andrew Murray 2024-02-22 18:56:26 +11:00 committed by Hugo van Kemenade
parent 22376775b0
commit 2a93aba5cf
3 changed files with 9 additions and 5 deletions
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Tests/icc/sGrey-v2-nano.icc Normal file
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5
Tests/test_imagecms.py
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@ -661,6 +661,11 @@ def test_auxiliary_channels_isolated() -> None:
assert_image_equal(test_image.convert(dst_format[2]), reference_image)
def test_long_modes() -> None:
p = ImageCms.getOpenProfile("Tests/icc/sGrey-v2-nano.icc")
ImageCms.buildTransform(p, p, "ABCDEFGHI", "ABCDEFGHI")
@pytest.mark.parametrize("mode", ("RGB", "RGBA", "RGBX"))
def test_rgb_lab(mode: str) -> None:
im = Image.new(mode, (1, 1))

9
src/_imagingcms.c
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@ -201,8 +201,8 @@ cms_transform_new(cmsHTRANSFORM transform, char *mode_in, char *mode_out) {
self->transform = transform;
strcpy(self->mode_in, mode_in);
strcpy(self->mode_out, mode_out);
strncpy(self->mode_in, mode_in, 8);
strncpy(self->mode_out, mode_out, 8);
return (PyObject *)self;
}
@ -242,10 +242,9 @@ findLCMStype(char *PILmode) {
// LabX equivalent like ALab, but not reversed -- no #define in lcms2
return (COLORSPACE_SH(PT_LabV2) | CHANNELS_SH(3) | BYTES_SH(1) | EXTRA_SH(1));
}
else {
/* take a wild guess... but you probably should fail instead. */
return TYPE_GRAY_8; /* so there's no buffer overrun... */
/* take a wild guess... */
return TYPE_GRAY_8;
}
}