linux-kernel - Re: Strange EFAULT on mips64el returned by syscall when another thread is forking

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Message-ID: <1e1ec730efc58f17ecf008a4600321e3d200ebda.camel@xry111.site>
Date: Fri, 26 Jan 2024 20:58:16 +0800
From: Xi Ruoyao <xry111@...111.site>
To: Jiaxun Yang <jiaxun.yang@...goat.com>, "linux-mips@...r.kernel.org"
	 <linux-mips@...r.kernel.org>
Cc: linux-kernel@...r.kernel.org, Thomas Bogendoerfer
	 <tsbogend@...ha.franken.de>, libc-alpha@...rceware.org, 
	regressions@...ts.linux.dev
Subject: Re: Strange EFAULT on mips64el returned by syscall when another
 thread is forking

On Fri, 2024-01-26 at 12:33 +0000, Jiaxun Yang wrote:
> 
> 
> 在2024年1月24日一月 上午10:42，Xi Ruoyao写道：
> > Hi,
> > 
> > When I'm testing Glibc master branch for upcoming 2.39 release, I
> > noticed an alarming test failure on mips64el:
> 
> So apparently it should be tracked as a regression.
> 
> #regzbot ^introduced 4bce37a68ff884e821a02a731897a8119e0c37b7
> 
> Should we revert it for now?

I'd say "yes" if we cannot easily patch instruction_pointer() to handle
delay slot.  Anyway the reversion will be a MIPS-only change.

-- 
Xi Ruoyao <xry111@...111.site>
School of Aerospace Science and Technology, Xidian University