bpo-36253: Remove use after free reference in ctypes test suite#12257
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bpo-36253: Remove use after free reference in ctypes test suite#12257
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jdemeyer
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May 16, 2019
jdemeyer
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@matrixise Does this needs a NEWS entry? I don't think so, it would just clutter the changelog. I ask you since you've been adding skip news labels to various of my PRs.
Other than that, I approve the patch. The point of that test is unclear to me.
Remove unnecessary elaboration of the old (bad, useless) test. Just mention that 'r' is now a dangling pointer and leave it at that.
Delete the news blurb, as minor changes to the ctypes test suite are not newsworthy.
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This doesn't need a news entry, no. |
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Removes invalid reference to freed memory in ctypes test case.
Once buf is deleted and freed r becomes a dangling pointer, further use requires reading from freed memory.
Bug found using asan, full details and stack trace attached in the bug tracker.
https://bugs.python.org/issue36253