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Date:   Wed, 02 Feb 2022 06:49:06 -0800
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Subject: Re: [syzbot] KASAN: vmalloc-out-of-bounds Write in ringbuf_map_alloc
From:   syzbot <syzbot+5ad567a418794b9b5983@syzkaller.appspotmail.com>
To:     andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org,
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        houtao1@huawei.com, john.fastabend@gmail.com, kafai@fb.com,
        kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org,
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Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+5ad567a418794b9b5983@syzkaller.appspotmail.com

Tested on:

commit:         48f52cba bpf: use VM_MAP instead of VM_ALLOC for ringbuf
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/dborkman/bpf.git pr/rb-vmap
kernel config:  https://syzkaller.appspot.com/x/.config?x=5044676c290190f2
dashboard link: https://syzkaller.appspot.com/bug?extid=5ad567a418794b9b5983
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Note: testing is done by a robot and is best-effort only.