Re: [PATCH 1/3] x86/entry: Fix idtentry unwind hint

Josh Poimboeuf
2017-12-20T06:34:56Z

On Wed, Dec 20, 2017 at 05:41:44AM +0000, Andrey Vagin wrote:
> Hi Josh,
>
>
> Now I see these two warnings on Linus' tree:
>
> [ 1.902454] WARNING: stack recursion on stack type 1
> [ 1.902466] WARNING: can't dereference iret registers at 00000000cd089a12 for ip entry_SYSCALL_64_fastpath+0x5/0x86

This still looks like the same issue where ORC is getting confused by
paravirt patching. Unfortunately the patches which fix this got
preempted by other work again. I haven't forgotten about it.

2017 is out the window, but hopefully in January I'll get a chance to
revive the patches.

--
Josh