On Wed, Nov 6, 2019 at 4:30 PM Daniel Vetter <daniel@xxxxxxxx> wrote: > > On Wed, Nov 6, 2019 at 4:20 PM syzbot > <syzbot+fb77e97ebf0612ee6914@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > > syzbot has bisected this bug to: > > > > commit 9e5a64c71b2f70ba530f8156046dd7dfb8a7a0ba > > Author: Kees Cook <keescook@xxxxxxxxxxxx> > > Date: Mon Nov 4 22:57:23 2019 +0000 > > > > uaccess: disallow > INT_MAX copy sizes > > Ah cool, this explains it. > > fwiw I never managed to get the WARNING in the backtrace to lign up > with any code. No idea what's been going on. > > I'll type a patch to paper over this. > -Daniel If I get: git checkout 8ada228a then include/linux/thread_info.h:150 points right to: if (WARN_ON_ONCE(bytes > INT_MAX)) Is the size user-controllable here? > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=125fe6dce00000 > > start commit: 51309b9d Add linux-next specific files for 20191105 > > git tree: linux-next > > final crash: https://syzkaller.appspot.com/x/report.txt?x=115fe6dce00000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=165fe6dce00000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=a9b1a641c1f1fc52 > > dashboard link: https://syzkaller.appspot.com/bug?extid=fb77e97ebf0612ee6914 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1212dc3ae00000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=145f604ae00000 > > > > Reported-by: syzbot+fb77e97ebf0612ee6914@xxxxxxxxxxxxxxxxxxxxxxxxx > > Fixes: 9e5a64c71b2f ("uaccess: disallow > INT_MAX copy sizes") > > > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > > > > -- > Daniel Vetter > Software Engineer, Intel Corporation > +41 (0) 79 365 57 48 - http://blog.ffwll.ch > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CAKMK7uFQt%2B%3D7XMo9jvz77QvDWLAAU_V7-_qZ%3DiKe-GXG7cqeJg%40mail.gmail.com. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
