linux-kernel - Re: [syzbot] BUG: sleeping function called from invalid context in __fdget

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Message-ID: <20210630120400.GA25168@gondor.apana.org.au>
Date:   Wed, 30 Jun 2021 20:04:00 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     Dave Hansen <dave.hansen@...el.com>,
        syzbot <syzbot+5d1bad8042a8f0e8117a@...kaller.appspotmail.com>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, jpa@....mail.kapsi.fi,
        kan.liang@...ux.intel.com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Thomas Gleixner <tglx@...utronix.de>, X86 ML <x86@...nel.org>
Subject: Re: [syzbot] BUG: sleeping function called from invalid context in
 __fdget_pos

On Wed, Jun 30, 2021 at 11:13:00AM +0200, Ard Biesheuvel wrote:
>
> So something like this, I suppose?

Yes this should work.  Ideally I think it should only call the
walker once instead of potentially three times but I can live
with that :)

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt