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| author | Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> | 2021-07-15 16:36:51 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-07-15 16:36:51 -0700 |
| commit | 298ee657ab8170adf75a186c0414b7ca3baf1991 (patch) | |
| tree | 17307435e9ee9871f12df489ea194d102f9dc13f /Include/internal | |
| parent | 0b4704973dbef712d05bdd62349bb4244f545430 (diff) | |
| download | cpython-git-298ee657ab8170adf75a186c0414b7ca3baf1991.tar.gz | |
bpo-44184: Fix subtype_dealloc() for freed type (GH-26274)
Fix a crash at Python exit when a deallocator function removes the
last strong reference to a heap type.
Don't read type memory after calling basedealloc() since
basedealloc() can deallocate the type and free its memory.
_PyMem_IsPtrFreed() argument is now constant.
(cherry picked from commit 615069eb08494d089bf24e43547fbc482ed699b8)
Co-authored-by: Victor Stinner <vstinner@python.org>
Diffstat (limited to 'Include/internal')
| -rw-r--r-- | Include/internal/pycore_pymem.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Include/internal/pycore_pymem.h b/Include/internal/pycore_pymem.h index 3d925e2250..9bcb5f5efd 100644 --- a/Include/internal/pycore_pymem.h +++ b/Include/internal/pycore_pymem.h @@ -42,7 +42,7 @@ PyAPI_FUNC(int) _PyMem_SetDefaultAllocator( fills newly allocated memory with CLEANBYTE (0xCD) and newly freed memory with DEADBYTE (0xDD). Detect also "untouchable bytes" marked with FORBIDDENBYTE (0xFD). */ -static inline int _PyMem_IsPtrFreed(void *ptr) +static inline int _PyMem_IsPtrFreed(const void *ptr) { uintptr_t value = (uintptr_t)ptr; #if SIZEOF_VOID_P == 8 |