[Tarantool-patches] [PATCH luajit] Fix memory probing allocator to check for valid end address, too.

[Igor Munkin]

Max,

Thanks for the patch! LGTM, after the fixes for the comments left by
Sergey.

On 31.05.23, Maxim Kokryashkin via Tarantool-patches wrote:
> From: Mike Pall <mike>
> 
> (cherry-picked from commit 646148e747759f0af3b47f9bd287cedd7e174631)
> 
> Before the patch `mmap_probe` only checked if the allocated chunk
> start was within the 2^LJ_ALLOC_MBITS bytes region. However, if the
> chunk is big enough, its end can reach outside of that region. This
> patch adds the corresponding check, to avoid such situations.
> 
> Maxim Kokryashkin:
> * added the description and the test for the problem
> 
> Part of tarantool/tarantool#8516
> ---
> Branch: https://github.com/tarantool/luajit/tree/fckxorg/lj-445-fix-memory-probing-allocator
> PR: https://github.com/tarantool/tarantool/pull/8720
> LuaJIT issue: https://github.com/LuaJIT/LuaJIT/issues/445
> 
>  src/lj_alloc.c                                |  3 +-
>  ...-445-fix-memory-probing-allocator.test.lua | 32 +++++++++++++++++++
>  2 files changed, 34 insertions(+), 1 deletion(-)
>  create mode 100644 test/tarantool-tests/lj-445-fix-memory-probing-allocator.test.lua
> 

<snipped>

> -- 
> 2.40.1
> 

-- 
Best regards,
IM