linux-kernel - Re: [syzbot] KASAN: vmalloc-out-of-bounds Write in ringbuf_map

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Date:   Wed, 02 Feb 2022 06:49:06 -0800
From:   syzbot <syzbot+5ad567a418794b9b5983@...kaller.appspotmail.com>
To:     andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
        daniel@...earbox.net, davem@...emloft.net, hotforest@...il.com,
        houtao1@...wei.com, john.fastabend@...il.com, kafai@...com,
        kpsingh@...nel.org, kuba@...nel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, songliubraving@...com,
        syzkaller-bugs@...glegroups.com, yhs@...com
Subject: Re: [syzbot] KASAN: vmalloc-out-of-bounds Write in ringbuf_map_alloc

Hello,

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

Reported-and-tested-by: syzbot+5ad567a418794b9b5983@...kaller.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.