[Tarantool-patches] [PATCH luajit] Fix JIT slot overflow during up-recursion.

[Sergey Kaplun]

Hello, Sergey!
Thanks for the review!
Updated the commit message as you suggested and rebased branch on the
current tarantool/master.

On 06.06.25, Sergey Bronnikov wrote:
> Hello, Sergey,
> 
> thanks for the patch!
> 
> LGTM with minor comment below.
> 
> Sergey
> 
> On 6/5/25 12:41, Sergey Kaplun wrote:
> > From: Mike Pall <mike>
> >
> > Reported by Sergey Kaplun.
> >
> > (cherry picked from commit 048972dbfdb6b441fe8a9bfe4d1f048966579ba8)
> >
> > In the case when LuaJIT is recording the side trace after the
> > up-recursion call, there is no check that the updated `maxslot` value
> > doesn't overflow the `LJ_MAX_JSLOTS` limit. If it records several huge
> > returns in a row, the overflow of the aforementioned limit may occur.
> > This triggers an assertion failure in `rec_check_slots()`.
> >
> > This patch fixes it by adding the corresponding check in the
> > `lj_record_ret()`.
> >
> > Sergey Kaplun:
> > * added the description and the test for the problem
> >
> > Part of tarantool/tarantool#11278
> Please add a "Closes tarantool/security#145".

Added:
| Resolves tarantool/security#145

> > ---
> > Branch:https://github.com/tarantool/luajit/tree/skaplun/lj-1358-jslot-overflow-uprecursion
> > Related issues:
> > *https://github.com/tarantool/tarantool/issues/11278
> > *https://github.com/LuaJIT/LuaJIT/issues/1358
> 
> Also https://github.com/tarantool/security/issues/145.
> 
> 
> <snipped>
> 

-- 
Best regards,
Sergey Kaplun