https://github.com/python/cpython/commit/8754abc358aff62feb37dd5d30f16eec06d9bbaa commit: 8754abc358aff62feb37dd5d30f16eec06d9bbaa branch: 3.13 author: Miss Islington (bot) <[email protected]> committer: ZeroIntensity <[email protected]> date: 2026-06-11T21:18:14-04:00 summary:
[3.13] gh-151065: Copy fix for memory leak from mimalloc upstream (GH-151066) (GH-151385) Applies https://github.com/microsoft/mimalloc/commit/d7a72c4912943e8aaf135e465ca5ea229ea96646 to our copy of mimalloc. (cherry picked from commit 80f9467434cecbc4e97b853b3876de13e75aec38) Co-authored-by: Peter Bierma <[email protected]> files: A Misc/NEWS.d/next/Core_and_Builtins/2026-06-08-05-31-22.gh-issue-151065._o_31F.rst M Objects/mimalloc/init.c diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-06-08-05-31-22.gh-issue-151065._o_31F.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-06-08-05-31-22.gh-issue-151065._o_31F.rst new file mode 100644 index 000000000000000..e46c96ef784cc9e --- /dev/null +++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-06-08-05-31-22.gh-issue-151065._o_31F.rst @@ -0,0 +1 @@ +Fix memory leak when using the :ref:`mimalloc memory allocator <mimalloc>`. diff --git a/Objects/mimalloc/init.c b/Objects/mimalloc/init.c index 81b241063ff40fc..7711c827a58b1ca 100644 --- a/Objects/mimalloc/init.c +++ b/Objects/mimalloc/init.c @@ -183,9 +183,9 @@ mi_heap_t* _mi_heap_main_get(void) { // note: in x64 in release build `sizeof(mi_thread_data_t)` is under 4KiB (= OS page size). typedef struct mi_thread_data_s { - mi_heap_t heap; // must come first due to cast in `_mi_heap_done` + mi_heap_t heap; // must come first due to cast in `_mi_heap_done` mi_tld_t tld; - mi_memid_t memid; + mi_memid_t memid; // must come last due to zero'ing } mi_thread_data_t; @@ -231,7 +231,7 @@ static mi_thread_data_t* mi_thread_data_zalloc(void) { } if (td != NULL && !is_zero) { - _mi_memzero_aligned(td, sizeof(*td)); + _mi_memzero_aligned(td, offsetof(mi_thread_data_t,memid)); } return td; } _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
