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| author | Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> | 2022-04-14 01:38:37 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-04-14 01:38:37 (GMT) |
| commit | 72114c06fd8f105437d671277b0593a378ecc3f4 (patch) | |
| tree | 6801f9f3caaa364f709e159b28282af22f6aedd6 /Misc | |
| parent | 89697f7374ea947ebe8e36131e2d3e21fff6fa1d (diff) | |
| download | cpython-72114c06fd8f105437d671277b0593a378ecc3f4.zip cpython-72114c06fd8f105437d671277b0593a378ecc3f4.tar.gz cpython-72114c06fd8f105437d671277b0593a378ecc3f4.tar.bz2 | |
gh-91421: Use constant value check during runtime (GH-91422) (GH-91492)
The left-hand side expression of the if-check can be converted to a
constant by the compiler, but the addition on the right-hand side is
performed during runtime.
Move the addition from the right-hand side to the left-hand side by
turning it into a subtraction there. Since the values are known to
be large enough to not turn negative, this is a safe operation.
Prevents a very unlikely integer overflow on 32 bit systems.
Fixes GH-91421.
(cherry picked from commit 0859368335d470b9ff33fc53ed9a85ec2654b278)
Co-authored-by: Tobias Stoeckmann <stoeckmann@users.noreply.github.com>
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS.d/next/Core and Builtins/2022-04-10-22-57-27.gh-issue-91421.dHhv6U.rst | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-04-10-22-57-27.gh-issue-91421.dHhv6U.rst b/Misc/NEWS.d/next/Core and Builtins/2022-04-10-22-57-27.gh-issue-91421.dHhv6U.rst new file mode 100644 index 0000000..898eb0d --- /dev/null +++ b/Misc/NEWS.d/next/Core and Builtins/2022-04-10-22-57-27.gh-issue-91421.dHhv6U.rst @@ -0,0 +1 @@ +Fix a potential integer overflow in _Py_DecodeUTF8Ex. |