Bug 89162 - Matrix multiply operator typecheck missing
Summary: Matrix multiply operator typecheck missing
Status: RESOLVED FIXED
Alias: None
Product: pycairo
Classification: Unclassified
Component: general (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Steve Chaplin
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Reported: 2015-02-16 06:36 UTC by Lawrence D'Oliveiro
Modified: 2017-07-05 15:06 UTC (History)
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typecheck Matrix.__mul__ second operand (771 bytes, text/plain)
2015-02-16 06:36 UTC, Lawrence D'Oliveiro 		Details
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Description Lawrence D'Oliveiro 2015-02-16 06:36:32 UTC 
Created attachment 113517 [details]
typecheck Matrix.__mul__ second operand

In python3-cairo, the routine that implements the “*” operator between two Matrix objects neglects to ensure that its second operand really is a Matrix. Pass an arbitrary value, and it will cheerfully return nonsensical results, possibly even accessing invalid memory and causing a crash.

The enclosed patch adds the necessary typecheck.
Comment 1 Christoph Reiter 2017-07-05 15:06:57 UTC 
Fixed since 1.12: https://github.com/pygobject/pycairo/issues/8

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