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[3.12] gh-105235: Prevent reading outside buffer during mmap.find() (GH-105252) ...
authorMiss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Sat, 15 Jul 2023 02:15:14 +0000 (19:15 -0700)
committerGitHub <noreply@github.com>
Sat, 15 Jul 2023 02:15:14 +0000 (22:15 -0400)
commit4f3edd6b535b6a0b7352df134c0f445ab279bfc0
tree0acb4f0daa629ee9de7b92b847a4a7607541f709tree | snapshot
parent30f62748e99ef2af3bfbac0e2d84dccf48c81512commit | diff
[3.12] gh-105235: Prevent reading outside buffer during mmap.find() (GH-105252) (#106708)

gh-105235: Prevent reading outside buffer during mmap.find() (GH-105252)

* Add a special case for s[-m:] == p in _PyBytes_Find

* Add tests for _PyBytes_Find

* Make sure that start <= end in mmap.find
(cherry picked from commit ab86426a3472ab68747815299d390b213793c3d1)

Co-authored-by: Dennis Sweeney <36520290+sweeneyde@users.noreply.github.com>
Lib/test/test_mmap.py diff | blob | blame | history
Misc/NEWS.d/next/Core and Builtins/2023-06-02-19-37-29.gh-issue-105235.fgFGTi.rst [new file with mode: 0644] blob
Modules/_testinternalcapi.c diff | blob | blame | history
Modules/mmapmodule.c diff | blob | blame | history
Objects/bytesobject.c diff | blob | blame | history
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