Re: [syzbot] KASAN: vmalloc-out-of-bounds Read in bpf_jit_free

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On Mon, Feb 14, 2022 at 10:41 PM Song Liu <song@xxxxxxxxxx> wrote:
>
> On Mon, Feb 14, 2022 at 3:52 PM Daniel Borkmann <daniel@xxxxxxxxxxxxx> wrote:
> >
> > Song, ptal.
> >
> > On 2/14/22 7:45 PM, syzbot wrote:
> > > Hello,
> > >
> > > syzbot found the following issue on:
> > >
> > > HEAD commit:    e5313968c41b Merge branch 'Split bpf_sk_lookup remote_port..
> > > git tree:       bpf-next
> > > console output: https://syzkaller.appspot.com/x/log.txt?x=10baced8700000
> > > kernel config:  https://syzkaller.appspot.com/x/.config?x=c40b67275bfe2a58
> > > dashboard link: https://syzkaller.appspot.com/bug?extid=2f649ec6d2eea1495a8f

How do I run the exact same syzkaller? I am doing something like

./bin/syz-manager -config qemu.cfg

with the cfg file like:

{
        "target": "linux/amd64",
        "http": ":56741",
        "workdir": "workdir",
        "kernel_obj": "linux",
        "image": "./pkg/mgrconfig/testdata/stretch.img",
        "syzkaller": ".",
        "disable_syscalls": ["keyctl", "add_key", "request_key"],
        "suppressions": ["some known bug"],
        "procs": 8,
        "type": "qemu",
        "vm": {
                "count": 16,
                "cpu": 2,
                "mem": 2048,
                "kernel": "linux/arch/x86/boot/bzImage"
        }
}

Is this correct? I am using stretch.img from syzkaller site, and the
.config from
the link above.

Thanks,
Song



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