linux-kernel - Re: [syzbot] general protection fault in kernfs_get

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Message-ID: <0000000000009ed19b05eda581e7@google.com>
Date:   Wed, 16 Nov 2022 23:26:23 -0800
From:   syzbot <syzbot+534ee3d24c37c411f37f@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, andrii@...nel.org, ast@...nel.org,
        bpf@...r.kernel.org, brauner@...nel.org,
        gregkh@...uxfoundation.org, kafai@...com,
        linux-kernel@...r.kernel.org, lk@...e.de, martin.lau@...ux.dev,
        peterx@...hat.com, shy828301@...il.com,
        syzkaller-bugs@...glegroups.com, tj@...nel.org,
        yosryahmed@...gle.com, zokeefe@...gle.com
Subject: Re: [syzbot] general protection fault in kernfs_get_inode

syzbot suspects this issue was fixed by commit:

commit c6a7f445a2727a66fe68a7097f42698d8b31ea2c
Author: Yang Shi <shy828301@...il.com>
Date:   Wed Jul 6 23:59:20 2022 +0000

    mm: khugepaged: don't carry huge page to the next loop for !CONFIG_NUMA

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=179cadcd880000
start commit:   55be6084c8e0 Merge tag 'timers-core-2022-10-05' of git://g..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=df75278aabf0681a
dashboard link: https://syzkaller.appspot.com/bug?extid=534ee3d24c37c411f37f
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=150adc52880000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=149d9584880000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: mm: khugepaged: don't carry huge page to the next loop for !CONFIG_NUMA

For information about bisection process see: https://goo.gl/tpsmEJ#bisection