Fix 2 buffer overflows in TIFF decoding

[hugovk]

No description provided.

[codecov]

Codecov Report

Merging #47 into master will decrease coverage by 0.06%.
The diff coverage is 40%.

@@            Coverage Diff             @@
##           master      #47      +/-   ##
==========================================
- Coverage   89.84%   89.77%   -0.07%     
==========================================
  Files         328      326       -2     
  Lines       40845    40842       -3     
==========================================
- Hits        36696    36666      -30     
- Misses       4149     4176      +27

Flag	Coverage Δ
#AppVeyor	88.13% <ø> (-1.34%)	⬇️
#GHA_Docker	85.94% <40%> (-0.02%)	⬇️
#GHA_Ubuntu	88.03% <40%> (+0.03%)	⬆️
#GHA_Windows	?
#GHA_macOS	87.01% <40%> (-0.04%)	⬇️
#TravisCI	92.66% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
src/libImaging/TiffDecode.c	83.33% <40%> (-1.64%)	⬇️
Tests/test_imagefont_bitmap.py	91.3% <0%> (-8.7%)	⬇️
Tests/test_features.py	96.92% <0%> (-3.08%)	⬇️
src/PIL/ImageTk.py	73.59% <0%> (-2.41%)	⬇️
src/PIL/ImageCms.py	83.11% <0%> (-2.23%)	⬇️
src/PIL/features.py	95.78% <0%> (-2.11%)	⬇️
Tests/test_file_webp.py	98% <0%> (-2%)	⬇️
src/PIL/XpmImagePlugin.py	89.28% <0%> (-1.79%)	⬇️
src/PIL/ImageFont.py	94.71% <0%> (-1.45%)	⬇️
Tests/test_file_icns.py	98.75% <0%> (-1.25%)	⬇️
... and 3 more

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c7f9e19...2092801. Read the comment docs.

[codecov]

Codecov Report

Merging #47 into master will decrease coverage by 0.06%.
The diff coverage is 40%.

@@            Coverage Diff             @@
##           master      #47      +/-   ##
==========================================
- Coverage   89.84%   89.77%   -0.07%     
==========================================
  Files         328      326       -2     
  Lines       40845    40842       -3     
==========================================
- Hits        36696    36666      -30     
- Misses       4149     4176      +27

Flag	Coverage Δ
#AppVeyor	88.13% <ø> (-1.34%)	⬇️
#GHA_Docker	85.94% <40%> (-0.02%)	⬇️
#GHA_Ubuntu	88.03% <40%> (+0.03%)	⬆️
#GHA_Windows	?
#GHA_macOS	87.01% <40%> (-0.04%)	⬇️
#TravisCI	92.66% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
src/libImaging/TiffDecode.c	83.33% <40%> (-1.64%)	⬇️
Tests/test_imagefont_bitmap.py	91.3% <0%> (-8.7%)	⬇️
Tests/test_features.py	96.92% <0%> (-3.08%)	⬇️
src/PIL/ImageTk.py	73.59% <0%> (-2.41%)	⬇️
src/PIL/ImageCms.py	83.11% <0%> (-2.23%)	⬇️
src/PIL/features.py	95.78% <0%> (-2.11%)	⬇️
Tests/test_file_webp.py	98% <0%> (-2%)	⬇️
src/PIL/XpmImagePlugin.py	89.28% <0%> (-1.79%)	⬇️
src/PIL/ImageFont.py	94.71% <0%> (-1.45%)	⬇️
Tests/test_file_icns.py	98.75% <0%> (-1.25%)	⬇️
... and 3 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c7f9e19...2092801. Read the comment docs.