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

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Message-ID: <0be1203c9df55432548c92281c8392dfa2f7d6bf.camel@xry111.site>
Date: Thu, 25 Jan 2024 00:13:43 +0800
From: Xi Ruoyao <xry111@...111.site>
To: Andreas Schwab <schwab@...e.de>
Cc: linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org, Jiaxun Yang
 <jiaxun.yang@...goat.com>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
  libc-alpha@...rceware.org
Subject: Re: Strange EFAULT on mips64el returned by syscall when another
 thread is forking

On Wed, 2024-01-24 at 20:49 +0800, Xi Ruoyao wrote:
> On Wed, 2024-01-24 at 12:59 +0100, Andreas Schwab wrote:
> > On Jan 24 2024, Xi Ruoyao wrote:
> > 
> > > Now I'm suspecting this might be a kernel bug.  Any pointer to further
> > > triage?
> > 
> > Is this a regression?
> 
> Initially I guessed it was perhaps a Glibc regression related to the
> newly introduced clone3 usage on MIPS, but it fails with Glibc-2.35 too.
> 
> Not sure if this is a kernel regression, I'll try different kernels in
> several hours (once I can physically access the system).

Not happening with kernel 5.18.1.  I can do a bisection but it will take
several days, I guess.

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