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Fixed dangling imemo_tmpbuf

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The count of rb_alloc_tmp_buffer_with_count is the allocation size
counted in VALUE size but not in the requested element size.

Co-authored-by: Yusuke Endoh <mame@ruby-lang.org>
Co-authored-by: Koichi Sasada <ko1@atdot.net>
This commit is contained in:
Nobuyoshi Nakada 2021-01-02 12:11:52 +09:00
parent 4b6fd8329b
commit f690eb34e2
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1 changed files with 3 additions and 2 deletions
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5
include/ruby/internal/memory.h
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@ -250,8 +250,9 @@ rbimpl_size_mul_or_raise(size_t x, size_t y)
static inline void *
rb_alloc_tmp_buffer2(volatile VALUE *store, long count, size_t elsize)
{
return rb_alloc_tmp_buffer_with_count(
store, rbimpl_size_mul_or_raise(count, elsize), count);
const size_t total_size = rbimpl_size_mul_or_raise(count, elsize);
const size_t cnt = (total_size + sizeof(VALUE) - 1) / sizeof(VALUE);
return rb_alloc_tmp_buffer_with_count(store, total_size, cnt);
}
#ifndef __MINGW32__