linux-kernel - Re: [syzbot] KASAN: vmalloc-out-of-bounds Read in bpf_trace

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Message-ID: <0000000000002c193805bee0f97c@google.com>
Date:   Wed, 31 Mar 2021 20:39:05 -0700
From:   syzbot <syzbot+845923d2172947529b58@...kaller.appspotmail.com>
To:     andrii@...nel.org, andriin@...com, ast@...nel.org,
        bpf@...r.kernel.org, coreteam@...filter.org, daniel@...earbox.net,
        davem@...emloft.net, hawk@...nel.org, john.fastabend@...il.com,
        kaber@...sh.net, kadlec@...ckhole.kfki.hu, kafai@...com,
        kpsingh@...omium.org, kpsingh@...nel.org, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        mathieu.desnoyers@...icios.com, mchehab@...nel.org,
        mchehab@...pensource.com, mingo@...nel.org, mingo@...hat.com,
        mmullins@...x.us, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, pablo@...filter.org,
        peterz@...radead.org, rostedt@...dmis.org, songliubraving@...com,
        syzkaller-bugs@...glegroups.com, yhs@...com
Subject: Re: [syzbot] KASAN: vmalloc-out-of-bounds Read 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=123358a1d00000
start commit:   70b97111 bpf: Use hlist_add_head_rcu when linking to local..
git tree:       bpf-next
kernel config:  https://syzkaller.appspot.com/x/.config?x=7e0ca96a9b6ee858
dashboard link: https://syzkaller.appspot.com/bug?extid=845923d2172947529b58
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10193f3b900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=168c729b900000

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