linux-kernel - Re: [syzbot] WARNING in bpf

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Message-ID: <CACT4Y+bnN7oZp2WJf+Jcx8+de1roOdLB=f_Zu+0H4UHEkfcO8A@mail.gmail.com>
Date:   Tue, 8 Nov 2022 14:53:34 -0800
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+245129539c27fecf099a@...kaller.appspotmail.com>
Cc:     andrii@...nel.org, andriin@...com, ast@...nel.org,
        bpf@...r.kernel.org, clang-built-linux@...glegroups.com,
        daniel@...earbox.net, davem@...emloft.net, haoluo@...gle.com,
        hawk@...nel.org, john.fastabend@...il.com, jolsa@...nel.org,
        kafai@...com, kpsingh@...nel.org, kuba@...nel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        martin.lau@...ux.dev, memxor@...il.com, nathan@...nel.org,
        ndesaulniers@...gle.com, netdev@...r.kernel.org, sdf@...gle.com,
        shanavas@...stalwater.ae, song@...nel.org, songliubraving@...com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        trix@...hat.com, yhs@...com
Subject: Re: [syzbot] WARNING in bpf_check (3)

On Mon, 7 Nov 2022 at 02:48, syzbot
<syzbot+245129539c27fecf099a@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 34dd3bad1a6f1dc7d18ee8dd53f1d31bffd2aee8
> Author: Alexei Starovoitov <ast@...nel.org>
> Date:   Fri Sep 2 21:10:47 2022 +0000
>
>     bpf: Relax the requirement to use preallocated hash maps in tracing progs.
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1232e176880000
> start commit:   506357871c18 Merge tag 'spi-fix-v6.0-rc4' of git://git.ker..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=1b95a17a5bfb1521
> dashboard link: https://syzkaller.appspot.com/bug?extid=245129539c27fecf099a
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10940477080000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=177e8f43080000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: bpf: Relax the requirement to use preallocated hash maps in tracing progs.
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Looks reasonable based on the subsystem and the patch:

#syz fix:
bpf: Relax the requirement to use preallocated hash maps in tracing progs.