linux-kernel - Re: [syzbot] BUG: unable to handle kernel paging request in bpf_trace

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Message-ID: <000000000000043f2c05beed04d8@google.com>
Date:   Thu, 01 Apr 2021 11:01:07 -0700
From:   syzbot <syzbot+cc36fd07553c0512f5f7@...kaller.appspotmail.com>
To:     andrii@...nel.org, andriin@...com, ast@...nel.org,
        bpf@...r.kernel.org, corbet@....net, daniel@...earbox.net,
        davem@...emloft.net, dsahern@...il.com, hawk@...nel.org,
        john.fastabend@...il.com, kafai@...com, kpsingh@...omium.org,
        kpsingh@...nel.org, kuba@...nel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, mathieu.desnoyers@...icios.com,
        mingo@...nel.org, mingo@...hat.com, mmullins@...x.us,
        netdev@...r.kernel.org, peterz@...radead.org, rostedt@...dmis.org,
        songliubraving@...com, syzkaller-bugs@...glegroups.com, yhs@...com
Subject: Re: [syzbot] BUG: unable to handle kernel paging request in bpf_trace_run2

syzbot suspects this issue was fixed by commit:

commit befe6d946551d65cddbd32b9cb0170b0249fd5ed
Author: Steven Rostedt (VMware) <rostedt@...dmis.org>
Date:   Wed Nov 18 14:34:05 2020 +0000

    tracepoint: Do not fail unregistering a probe due to memory failure

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14f0260ed00000
start commit:   12450081 libbpf: Fix native endian assumption when parsing..
git tree:       bpf
kernel config:  https://syzkaller.appspot.com/x/.config?x=5ac0d21536db480b
dashboard link: https://syzkaller.appspot.com/bug?extid=cc36fd07553c0512f5f7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1365d2c3900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16d5f08d900000

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

#syz fix: tracepoint: Do not fail unregistering a probe due to memory failure

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