[Tarantool-patches] [PATCH luajit] Fix overflow check in unpack().

[Sergey Kaplun]

Hi, Sergos!

Thanks for the review!

On 23.08.22, sergos wrote:
> Hi Sergey!
> 
> Thanks for the patch, LGTM.
> 
> Sergos.
> 
> 
> > On 23 Aug 2022, at 11:06, Sergey Kaplun <skaplun at tarantool.org> wrote:
> > 
> > From: Mike Pall <mike>
> > 
> > Thanks to HybridDog.

Added the following forgotten title as usual:)

| (cherry picked from commit 179cf2eb84fef2b9a524469c3c8cc49363b8fb10)

Branch is force-pushed.

> > 
> > When build with optimization compiler may throw away overflow check in
> > `unpack()` base library function.
> > 
> > This patch prevents aforementioned error by comparing the unsigned
> > amount of values to unpack with `LUAI_MAXCSTACK` instead of 0.
> > 
> > Sergey Kaplun:
> > * added the description and the test for the problem
> > 
> > Part of tarantool/tarantool#7230
> > ---
> > 
> > Issue/PR:
> > * https://github.com/LuaJIT/LuaJIT/pull/574
> > * https://github.com/tarantool/tarantool/issues/7230
> > Branch: https://github.com/tarantool/luajit/tree/skaplun/lj-574-overflow-unpack-full-ci
> > PR: https://github.com/tarantool/tarantool/pull/7596
> > 

<snipped>

> > 2.34.1
> > 
> 

-- 
Best regards,
Sergey Kaplun