On Fri, Sep 7, 2018 at 8:19 AM, Dmitry Vyukov <dvyu...@google.com> wrote: > On Fri, Sep 7, 2018 at 5:17 PM, syzbot > <syzbot+a3c9d2673837ccc0f...@syzkaller.appspotmail.com> wrote: >> Hello, >> >> syzbot found the following crash on: >> >> HEAD commit: 28619527b8a7 Merge git://git.kernel.org/pub/scm/linux/kern.. >> git tree: bpf >> console output: https://syzkaller.appspot.com/x/log.txt?x=1618ac21400000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=62e9b447c16085cf >> dashboard link: https://syzkaller.appspot.com/bug?extid=a3c9d2673837ccc0f22b >> compiler: gcc (GCC) 8.0.1 20180413 (experimental) >> >> Unfortunately, I don't have any reproducer for this crash yet. >> >> IMPORTANT: if you fix the bug, please add the following tag to the commit: >> Reported-by: syzbot+a3c9d2673837ccc0f...@syzkaller.appspotmail.com > > +Kees, looks like false positive?
Basically, yes. CONFIG_HARDENED_USERCOPY_PAGESPAN=y should not be used -- it's for tracking down these cases (not really for general-purpose "debugging"), but no one is currently working on solving them. -Kees -- Kees Cook Pixel Security
