Hello, syzbot found the following crash on: HEAD commit: 7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1654e385100000 kernel config: https://syzkaller.appspot.com/x/.config?x=be4578b3f1083656 dashboard link: https://syzkaller.appspot.com/bug?extid=e0240f9c36530bda7130 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15f3abc9100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=131b7bb5100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+e0240f9c36530bda7130@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: out-of-bounds in kvm_cpu_cap_get arch/x86/kvm/cpuid.h:292 [inline] BUG: KASAN: out-of-bounds in kvm_cpu_cap_has arch/x86/kvm/cpuid.h:297 [inline] BUG: KASAN: out-of-bounds in kvm_init_msr_list arch/x86/kvm/x86.c:5362 [inline] BUG: KASAN: out-of-bounds in kvm_arch_hardware_setup+0xb05/0xf40 arch/x86/kvm/x86.c:9802 Read of size 4 at addr ffffffff896c3134 by task syz-executor614/6786 CPU: 1 PID: 6786 Comm: syz-executor614 Not tainted 5.7.0-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+0x1e9/0x30e lib/dump_stack.c:118 print_address_description+0x66/0x5a0 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report+0x132/0x1d0 mm/kasan/report.c:530 kvm_cpu_cap_get arch/x86/kvm/cpuid.h:292 [inline] kvm_cpu_cap_has arch/x86/kvm/cpuid.h:297 [inline] kvm_init_msr_list arch/x86/kvm/x86.c:5362 [inline] kvm_arch_hardware_setup+0xb05/0xf40 arch/x86/kvm/x86.c:9802 </IRQ> The buggy address belongs to the variable: kvm_cpu_caps+0x24/0x50 Memory state around the buggy address: ffffffff896c3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff896c3080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffff896c3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffffff896c3180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff896c3200: 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
