Hi Song, Is syzkaller not doing something you expect it to do with this config? On Wed, Feb 16, 2022 at 2:38 AM Song Liu <song@xxxxxxxxxx> wrote: > > 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", This image location looks suspicious - we store some dummy data for tests in that folder. Instances now run on buildroot-based images, generated with https://github.com/google/syzkaller/blob/master/tools/create-buildroot-image.sh > "syzkaller": ".", > "disable_syscalls": ["keyctl", "add_key", "request_key"], For our bpf instances, instead of disable_syscalls we use enable_syscalls: "enable_syscalls": [ "bpf", "mkdir", "mount$bpf", "unlink", "close", "perf_event_open*", "ioctl$PERF*", "getpid", "gettid", "socketpair", "sendmsg", "recvmsg", "setsockopt$sock_attach_bpf", "socket$kcm", "ioctl$sock_kcm*", "syz_clone", "mkdirat$cgroup*", "openat$cgroup*", "write$cgroup*", "openat$tun", "write$tun", "ioctl$TUN*", "ioctl$SIOCSIFHWADDR", "openat$ppp", "syz_open_procfs$namespace" ] > "suppressions": ["some known bug"], > "procs": 8, We usually run with "procs": 6, but it's not that important. > "type": "qemu", > "vm": { > "count": 16, > "cpu": 2, > "mem": 2048, > "kernel": "linux/arch/x86/boot/bzImage" > } > } Otherwise I don't see any really significant differences. -- Best Regards Aleksandr > > Is this correct? I am using stretch.img from syzkaller site, and the > .config from > the link above. > > Thanks, > Song >
