INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-mmots-kasan-gce-3,10.128.0.20' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.760805] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 57.767611] usercopy: kernel memory overwrite attempt detected to ffff8801c1749bd4 (kvm_vcpu) (1320 bytes) [ 57.769087] ------------[ cut here ]------------ [ 57.769721] kernel BUG at mm/usercopy.c:84! [ 57.770329] invalid opcode: 0000 [#1] SMP KASAN [ 57.770950] Dumping ftrace buffer: [ 57.771424] (ftrace buffer empty) [ 57.771918] Modules linked in: [ 57.772351] CPU: 0 PID: 2988 Comm: syzkaller389271 Not tainted 4.14.0-rc5-mm1+ #20 [ 57.773359] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.774577] task: ffff8801d20d4380 task.stack: ffff8801d4a58000 [ 57.775382] RIP: 0010:__check_object_size+0x3a2/0x4f0 [ 57.776067] RSP: 0018:ffff8801d4a5f148 EFLAGS: 00010286 [ 57.776778] RAX: 000000000000005e RBX: ffffffff8511a100 RCX: 0000000000000000 [ 57.777730] RDX: 000000000000005e RSI: 1ffff1003a94bde9 RDI: ffffed003a94be1d [ 57.778698] RBP: ffff8801d4a5f238 R08: 0000000000000001 R09: 0000000000000000 [ 57.779648] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8511a0c0 [ 57.780601] R13: ffff8801c1749bd4 R14: 0000000000000528 R15: ffffea000705d200 [ 57.784597] FS: 000000000117b880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 57.792788] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.798637] CR2: 00007ffeb855ca80 CR3: 00000001d1c37000 CR4: 00000000001426f0 [ 57.805873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.813107] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.820341] Call Trace: [ 57.822897] ? lock_release+0xa40/0xa40 [ 57.826838] ? check_stack_object+0x140/0x140 [ 57.831301] ? check_noncircular+0x20/0x20 [ 57.835504] ? __might_sleep+0x95/0x190 [ 57.839448] kvm_vcpu_ioctl_set_cpuid2+0x75/0x1a0 [ 57.844259] kvm_arch_vcpu_ioctl+0x1718/0x4710 [ 57.848806] ? find_held_lock+0x35/0x1d0 [ 57.852834] ? kvm_arch_vcpu_put+0x3e0/0x3e0 [ 57.857208] ? depot_save_stack+0x3b5/0x490 [ 57.861492] ? lock_downgrade+0x990/0x990 [ 57.865608] ? do_raw_spin_trylock+0x190/0x190 [ 57.870156] ? is_bpf_text_address+0xa4/0x120 [ 57.874616] ? kernel_text_address+0x102/0x140 [ 57.879164] ? __kernel_text_address+0xd/0x40 [ 57.883625] ? unwind_get_return_address+0x61/0xa0 [ 57.888521] ? trace_hardirqs_off+0xd/0x10 [ 57.892720] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 57.897788] ? depot_save_stack+0x3b5/0x490 [ 57.902076] ? __vunmap+0x247/0x2e0 [ 57.905666] ? save_stack+0xa3/0xd0 [ 57.909259] ? lock_acquire+0x1d5/0x580 [ 57.913198] ? lock_acquire+0x1d5/0x580 [ 57.917135] ? vcpu_load+0x1c/0x70 [ 57.920642] ? lock_release+0xa40/0xa40 [ 57.924582] ? trace_event_raw_event_sched_switch+0x8a0/0x8a0 [ 57.930433] ? rcu_note_context_switch+0x710/0x710 [ 57.935330] ? __might_sleep+0x95/0x190 [ 57.939268] ? vcpu_load+0x1c/0x70 [ 57.942774] ? __mutex_lock+0x16f/0x19d0 [ 57.946797] ? vcpu_load+0x1c/0x70 [ 57.950304] ? vcpu_load+0x1c/0x70 [ 57.953809] ? trace_hardirqs_off+0xd/0x10 [ 57.958016] ? mutex_lock_io_nested+0x1880/0x1880 [ 57.962827] ? find_held_lock+0x35/0x1d0 [ 57.966858] ? __might_fault+0x110/0x1d0 [ 57.970885] ? lock_downgrade+0x990/0x990 [ 57.974998] ? vmx_vcpu_load+0x9c6/0xdd0 [ 57.979025] ? handle_invept+0x5f0/0x5f0 [ 57.983055] ? __might_sleep+0x95/0x190 [ 57.986998] ? kasan_check_read+0x11/0x20 [ 57.991110] ? _copy_to_user+0xa2/0xc0 [ 57.994962] ? kvm_arch_dev_ioctl+0xc7/0x3b0 [ 57.999334] ? kvm_vm_ioctl_check_extension+0x510/0x510 [ 58.004666] ? kvm_arch_vcpu_load+0x1c1/0x890 [ 58.009125] ? kvm_arch_vcpu_load+0x4b1/0x890 [ 58.013583] ? find_held_lock+0x35/0x1d0 [ 58.017610] ? kvm_arch_dev_ioctl+0x3b0/0x3b0 [ 58.022071] ? __hrtick_start+0x1d0/0x1d0 [ 58.026189] ? avc_has_extended_perms+0x6e5/0x12c0 [ 58.031085] ? vcpu_load+0x4b/0x70 [ 58.034591] kvm_vcpu_ioctl+0x240/0x1010 [ 58.038617] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 58.043857] ? is_bpf_text_address+0xa4/0x120 [ 58.048334] ? avc_has_extended_perms+0x7fa/0x12c0 [ 58.053225] ? unwind_get_return_address+0x6e/0xa0 [ 58.058127] ? avc_ss_reset+0x110/0x110 [ 58.062071] ? putname+0xee/0x130 [ 58.065488] ? save_stack+0xa3/0xd0 [ 58.069082] ? save_stack+0x43/0xd0 [ 58.072672] ? kasan_slab_free+0x71/0xc0 [ 58.076697] ? kmem_cache_free+0x77/0x280 [ 58.080807] ? putname+0xee/0x130 [ 58.084223] ? do_sys_open+0x31b/0x6d0 [ 58.088077] ? __lock_is_held+0xb6/0x140 [ 58.092112] ? trace_event_raw_event_sched_switch+0x8a0/0x8a0 [ 58.097964] ? rcu_note_context_switch+0x710/0x710 [ 58.102856] ? get_unused_fd_flags+0x190/0x190 [ 58.107406] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 58.112646] do_vfs_ioctl+0x1b1/0x1520 [ 58.116499] ? _cond_resched+0x14/0x30 [ 58.120352] ? ioctl_preallocate+0x2b0/0x2b0 [ 58.124727] ? selinux_capable+0x40/0x40 [ 58.128755] ? putname+0xf3/0x130 [ 58.132175] ? do_sys_open+0x320/0x6d0 [ 58.136032] ? security_file_ioctl+0x89/0xb0 [ 58.140407] SyS_ioctl+0x8f/0xc0 [ 58.143742] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 58.148461] RIP: 0033:0x442f97 [ 58.151616] RSP: 002b:00007ffeb855ca78 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 58.159287] RAX: ffffffffffffffda RBX: 00007ffeb855d150 RCX: 0000000000442f97 [ 58.166522] RDX: 00007ffeb855d150 RSI: 000000004008ae90 RDI: 0000000000000005 [ 58.173758] RBP: 0000000000000082 R08: 0000000000000001 R09: fffffffffffffffe [ 58.180992] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004040b0 [ 58.188228] R13: 0000000000404140 R14: 0000000000000004 R15: 0000000000000000 [ 58.195472] Code: 48 0f 44 da e8 e0 d7 c3 ff 48 8b 85 28 ff ff ff 4d 89 f1 4c 89 e9 4c 89 e2 48 89 de 48 c7 c7 c0 a1 11 85 49 89 c0 e8 33 e3 ad ff <0f> 0b 48 c7 c0 80 9f 11 85 eb 96 48 c7 c0 c0 9f 11 85 eb 8d 48 [ 58.214538] RIP: __check_object_size+0x3a2/0x4f0 RSP: ffff8801d4a5f148 [ 58.221229] ---[ end trace 61e2b8ed34e6b4a7 ]--- [ 58.225968] Kernel panic - not syncing: Fatal exception [ 58.231333] Dumping ftrace buffer: [ 58.234840] (ftrace buffer empty) [ 58.238516] Kernel Offset: disabled [ 58.242109] Rebooting in 86400 seconds..