https://github.com/python/cpython/commit/59d97683c19923b06e2b2110efadb90fe37f53f3 commit: 59d97683c19923b06e2b2110efadb90fe37f53f3 branch: main author: VanshAgarwal24036 <[email protected]> committer: vstinner <[email protected]> date: 2026-03-13T13:15:26+01:00 summary:
gh-145792: Fix incorrect alloca allocation size in traceback.c (#145814) files: A Misc/NEWS.d/next/Core_and_Builtins/2026-03-11-19-09-47.gh-issue-145792.X5KUhc.rst M Python/traceback.c diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-03-11-19-09-47.gh-issue-145792.X5KUhc.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-03-11-19-09-47.gh-issue-145792.X5KUhc.rst new file mode 100644 index 00000000000000..bd42f32d6ae3f5 --- /dev/null +++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-03-11-19-09-47.gh-issue-145792.X5KUhc.rst @@ -0,0 +1,2 @@ +Fix out-of-bounds access when invoking faulthandler on a CPython build +compiled without support for VLAs. diff --git a/Python/traceback.c b/Python/traceback.c index 74360a1c73c271..1e8c9c879f9aac 100644 --- a/Python/traceback.c +++ b/Python/traceback.c @@ -41,7 +41,7 @@ #if defined(__STDC_NO_VLA__) && (__STDC_NO_VLA__ == 1) /* Use alloca() for VLAs. */ -# define VLA(type, name, size) type *name = alloca(size) +# define VLA(type, name, size) type *name = alloca(sizeof(type) * (size)) #elif !defined(__STDC_NO_VLA__) || (__STDC_NO_VLA__ == 0) /* Use actual C VLAs.*/ # define VLA(type, name, size) type name[size] _______________________________________________ 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]
