On Sun, Dec 3, 2017 at 3:33 PM, syzbot <bot+c2f0aae104fa230ae495207c9108dafcdfff6...@syzkaller.appspotmail.com> wrote: > Hello, > > syzkaller hit the following crash on > fb20eb9d798d2f4c1a75b7fe981d72dfa8d7270d > git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > > Unfortunately, I don't have any reproducer for this bug yet. > > > kvm: pic: non byte read > BUG: unable to handle kernel paging request at 00000000ceaade8f > IP: lock_acquire+0x183/0x580 kernel/locking/lockdep.c:4002 > PGD 5e28067 P4D 5e28067 PUD 5e2a067 PMD 0 > Oops: 0002 [#1] SMP KASAN > Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: > CPU: 1 PID: 3607 Comm: syz-executor6 Not tainted 4.15.0-rc1-next-20171201+ > #57 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > task: 0000000065c3b570 task.stack: 0000000059ab470a > RIP: 0010:lock_acquire+0x183/0x580 kernel/locking/lockdep.c:4002 > RSP: 0018:ffff8801db507cc0 EFLAGS: 00010046 > RAX: 0000000000000007 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: ffff8801d8500080 RSI: 0000000000000000 RDI: ffff8801d8500904 > RBP: ffff8801db507db8 R08: 0000000000000001 R09: 0000000000000000 > R10: 1ffff1003b6a0f9e R11: 0000000000000000 R12: 1ffff1003b6a0f9e > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 > FS: 00007fc4d51b2700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: fffffffffffffff8 CR3: 00000001d8bae000 CR4: 00000000001426e0 > Call Trace: > <IRQ> > __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] > _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:159 > hrtimer_interrupt+0xc2/0x6f0 kernel/time/hrtimer.c:1450 > local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline] > smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050 > apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:907 > </IRQ> > RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:777 > [inline] > RIP: 0010:console_unlock+0x954/0xd70 kernel/printk/printk.c:2235 > RSP: 0018:ffff8801d8516ce8 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff11 > RAX: 0000000000010000 RBX: 0000000000000000 RCX: ffffffff8159c42b > RDX: 00000000000045d5 RSI: ffffc900032ec000 RDI: 0000000000000212 > RBP: ffff8801d8516dd0 R08: 1ffff1003b0a2d6b R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 > R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff83a24260 > vprintk_emit+0x4ad/0x590 kernel/printk/printk.c:1757 > vprintk_default+0x28/0x30 kernel/printk/printk.c:1796 > vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:379 > printk+0xaa/0xca kernel/printk/printk.c:1829 > picdev_read+0x53c/0x610 arch/x86/kvm/i8259.c:488 > picdev_slave_read+0x31/0x40 arch/x86/kvm/i8259.c:536 > kvm_iodevice_read include/kvm/iodev.h:59 [inline] > __kvm_io_bus_read arch/x86/kvm/../../../virt/kvm/kvm_main.c:3534 [inline] > kvm_io_bus_read+0x3e0/0x740 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3560 > kernel_pio+0xeb/0x240 arch/x86/kvm/x86.c:4912 > emulator_pio_in_out arch/x86/kvm/x86.c:4934 [inline] > emulator_pio_in_emulated+0x1e7/0x840 arch/x86/kvm/x86.c:4961 > pio_in_emulated arch/x86/kvm/emulate.c:1481 [inline] > em_in+0x562/0xa30 arch/x86/kvm/emulate.c:3834 > x86_emulate_insn+0x55d/0x3cf0 arch/x86/kvm/emulate.c:5522 > x86_emulate_instruction+0x411/0x1ad0 arch/x86/kvm/x86.c:5771 > emulate_instruction arch/x86/include/asm/kvm_host.h:1164 [inline] > handle_io+0xa4/0xd0 arch/x86/kvm/vmx.c:6028 > vmx_handle_exit+0x25d/0x1ce0 arch/x86/kvm/vmx.c:8893 > vcpu_enter_guest arch/x86/kvm/x86.c:7084 [inline] > vcpu_run arch/x86/kvm/x86.c:7146 [inline] > kvm_arch_vcpu_ioctl_run+0x1cb4/0x5c60 arch/x86/kvm/x86.c:7314 > kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2574 > vfs_ioctl fs/ioctl.c:46 [inline] > do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686 > SYSC_ioctl fs/ioctl.c:701 [inline] > SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 > entry_SYSCALL_64_fastpath+0x1f/0x96 > RIP: 0033:0x4529d9 > RSP: 002b:00007fc4d51b1c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007fc4d51b0810 RCX: 00000000004529d9 > RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000017 > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000019 > R13: 0000000020aad000 R14: 00007fc4d51b26d4 R15: 0000000000000000 > Code: df 48 89 f9 48 c1 e9 03 0f b6 0c 01 48 89 f8 83 e0 07 83 c0 03 38 c8 > 7c 08 84 c9 0f 85 fe 02 00 00 c7 82 84 08 00 00 01 00 00 00 <cc> 1f 44 00 00 > 65 8b 05 b1 c9 aa 7e 89 c0 48 0f a3 05 37 5f 08 > RIP: lock_acquire+0x183/0x580 kernel/locking/lockdep.c:4002 RSP: > ffff8801db507cc0 > CR2: fffffffffffffff8 > ---[ end trace 12ded351949fdf5b ]---
#syz dup: BUG: unable to handle kernel paging request in __switch_to > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkal...@googlegroups.com. > Please credit me with: Reported-by: syzbot <syzkal...@googlegroups.com> > > syzbot will keep track of this bug report. > Once a fix for this bug is committed, please reply to this email with: > #syz fix: exact-commit-title > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line in the email body. > > -- > 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+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/001a1143e6cc96ff49055f707aad%40google.com. > For more options, visit https://groups.google.com/d/optout.
