On Wed, Sep 19, 2018 at 9:18 AM, Michal Kubecek <mkubecek@xxxxxxx> wrote: > On Mon, Sep 17, 2018 at 03:36:21PM +0200, Dmitry Vyukov wrote: >> Hi, >> >> I am having some problem with upstream kernel and bpfilter. The >> manifestation is that IPT_SO_GET_INFO on an ipv4 socket works, then >> something (that I can't fully localize but can reproduce) happens and >> then IPT_SO_GET_INFO starts permanently returning 256. > ... >> Now the litmus program always fails with: >> >> getsockopt(3, SOL_IP, 0x40 /* IP_??? */, >> "filter\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., [84]) >> = 256 >> >> I am currently on upstream commit >> 28619527b8a712590c93d0a9e24b4425b9376a8c, my .config is attached. I >> don't know what is bpfilter, I see it mentions some umh, if it >> requires some additional setup I don't it, i.e. I don't install any >> userspace modules/helpers. > > This looks similar to the fallback issue described here: > > https://bugzilla.suse.com/show_bug.cgi?id=1106751#c1 > > Unfortunately I didn't have time to look into it more closely yet. +Takashi But I already have CONFIG_BPFILTER_UMH=y in my config, so it does not help completely. Also in my case it is working initially, but breaks after I run the second program.
