https://github.com/python/cpython/commit/78407daea0ff0c29e32d2cb03896957a51b294e2
commit: 78407daea0ff0c29e32d2cb03896957a51b294e2
branch: main
author: Malcolm Smith <[email protected]>
committer: mhsmith <[email protected]>
date: 2026-11-09T22:21:54Z
summary:
gh-158529: Prevent mimalloc calling system calls directly on Android (#158530)
files:
A
Misc/NEWS.d/next/Core_and_Builtins/2026-09-30-21-29-54.gh-issue-158529.kZO7mX.rst
M Objects/mimalloc/prim/unix/prim.c
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2026-09-30-21-29-54.gh-issue-158529.kZO7mX.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2026-09-30-21-29-54.gh-issue-158529.kZO7mX.rst
new file mode 100644
index 000000000000000..712f26f6493877c
--- /dev/null
+++
b/Misc/NEWS.d/next/Core_and_Builtins/2026-09-30-21-29-54.gh-issue-158529.kZO7mX.rst
@@ -0,0 +1,2 @@
+Fixed crash on Android x86_64, API levels 27-28, caused by mimalloc calling
+system calls directly.
diff --git a/Objects/mimalloc/prim/unix/prim.c
b/Objects/mimalloc/prim/unix/prim.c
index c66198464e72a21..477e2d8b2274c46 100644
--- a/Objects/mimalloc/prim/unix/prim.c
+++ b/Objects/mimalloc/prim/unix/prim.c
@@ -78,10 +78,11 @@ terms of the MIT license. A copy of the license can be
found in the file
// Use syscalls for some primitives to allow for libraries that override
open/read/close etc.
// and do allocation themselves; using syscalls prevents recursion when
mimalloc is
// still initializing (issue #713)
+// Not used on Android, see issue python/cpython/pull/158530
// Declare inline to avoid unused function warnings.
//------------------------------------------------------------------------------------
-#if defined(MI_HAS_SYSCALL_H) && defined(SYS_open) && defined(SYS_close) &&
defined(SYS_read) && defined(SYS_access)
+#if defined(MI_HAS_SYSCALL_H) && defined(SYS_open) && defined(SYS_close) &&
defined(SYS_read) && defined(SYS_access) && !defined(__ANDROID__)
static inline int mi_prim_open(const char* fpath, int open_flags) {
return syscall(SYS_open,fpath,open_flags,0);
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