linux-kernel - Re: [syzbot] [mm?] general protection fault in __hugetlb_zap

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Message-ID: <20231103181243.GA19832@monkey>
Date:   Fri, 3 Nov 2023 11:12:43 -0700
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     syzbot <syzbot+ec9435c038e451be48ff@...kaller.appspotmail.com>
Cc:     eadavis@...com, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [mm?] general protection fault in __hugetlb_zap_begin

On 11/03/23 04:52, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch but the reproducer is still triggering an issue:
> general protection fault in __hugetlb_zap_begin
> 
> general protection fault, probably for non-canonical address 0xdffffc000000001d: 0000 [#1] PREEMPT SMP KASAN
> KASAN: null-ptr-deref in range [0x00000000000000e8-0x00000000000000ef]

<snip>

> Tested on:
> 
> commit:         2dac7569 Add linux-next specific files for 20231018
> git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> console output: https://syzkaller.appspot.com/x/log.txt?x=14bc60d7680000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=29e8e23689e6210c
> dashboard link: https://syzkaller.appspot.com/bug?extid=ec9435c038e451be48ff
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> patch:          https://syzkaller.appspot.com/x/patch.diff?x=1088a55f680000

Unless I am missing something, I do not believe the tested patch was
proposed for the general protection fault in __hugetlb_zap_begin issue.
-- 
Mike Kravetz