Hello, syzbot found the following crash on: HEAD commit: 9786cab6 Merge tag 'selinux-pr-20200416' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1110c920100000 kernel config: https://syzkaller.appspot.com/x/.config?x=5d351a1019ed81a2 dashboard link: https://syzkaller.appspot.com/bug?extid=6ad11779184a3afe9f7e compiler: gcc (GCC) 9.0.0 20181231 (experimental) userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=141f46abe00000 Bisection is inconclusive: the bug happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12b44c73e00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=11b44c73e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=16b44c73e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+6ad11779184a3afe9f7e@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: out-of-bounds in copy_vmcs12_to_enlightened arch/x86/kvm/vmx/nested.c:1820 [inline] BUG: KASAN: out-of-bounds in nested_sync_vmcs12_to_shadow+0x49e3/0x4a60 arch/x86/kvm/vmx/nested.c:2000 Write of size 2 at addr ffffc90004db72e8 by task syz-executor.4/8294 CPU: 1 PID: 8294 Comm: syz-executor.4 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x315 mm/kasan/report.c:382 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511 kasan_report+0x33/0x50 mm/kasan/common.c:625 copy_vmcs12_to_enlightened arch/x86/kvm/vmx/nested.c:1820 [inline] nested_sync_vmcs12_to_shadow+0x49e3/0x4a60 arch/x86/kvm/vmx/nested.c:2000 </IRQ> Memory state around the buggy address: ffffc90004db7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004db7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004db7280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffc90004db7300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004db7380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
