[....] Starting enhanced syslogd: rsyslogd[ 11.187812] audit: type=1400 audit(1513782715.960:5): avc: denied { syslog } for pid=2996 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.357273] audit: type=1400 audit(1513782721.130:6): avc: denied { map } for pid=3136 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added 'ci-upstream-next-kasan-gce-7,10.128.15.248' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program [ 22.613205] audit: type=1400 audit(1513782727.386:7): avc: denied { map } for pid=3150 comm="syzkaller244813" path="/root/syzkaller244813524" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program [ 22.658190] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 23.919441] kasan: CONFIG_KASAN_INLINE enabled [ 23.924167] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.931570] general protection fault: 0000 [#1] SMP KASAN [ 23.937097] Dumping ftrace buffer: [ 23.940617] (ftrace buffer empty) [ 23.944306] Modules linked in: [ 23.947478] CPU: 0 PID: 4227 Comm: syzkaller244813 Not tainted 4.15.0-rc4-next-20171220+ #77 [ 23.956030] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program executing program [ 23.965379] RIP: 0010:finish_task_switch+0x42d/0x740 [ 23.970469] RSP: 0018:ffff8801c284f3b8 EFLAGS: 00010a06 [ 23.975822] RAX: dffffc0000000000 RBX: ffff8801db22c900 RCX: 1bd5a00000000022 [ 23.983162] RDX: 0000000000000000 RSI: 1ffff10038509e20 RDI: dead000000000110 [ 23.990418] RBP: ffff8801c284f468 R08: 1ffff10038661af3 R09: 0000000000000000 [ 23.997678] R10: ffff8801c284f390 R11: 0000000000000000 R12: ffff8801c2eca100 [ 24.004941] R13: 1ffff10038509e7c R14: dffffc0000000000 R15: dead000000000100 executing program executing program [ 24.012198] FS: 00007f7f034c8700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.020409] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.026272] CR2: 00007f7ee8491e78 CR3: 00000001ca6c9003 CR4: 00000000001626f0 [ 24.033528] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.040789] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.048053] Call Trace: [ 24.050637] ? copy_overflow+0x20/0x20 [ 24.054530] __schedule+0x8f3/0x2060 [ 24.058248] ? __sched_text_start+0x8/0x8 [ 24.062392] ? page_mapping+0x382/0x530 executing program executing program executing program [ 24.066356] ? mem_cgroup_uncharge+0xe0/0xe0 [ 24.070762] ? __lock_acquire+0x664/0x3e00 [ 24.074990] ? __lock_is_held+0xb6/0x140 [ 24.079047] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.084933] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.090115] preempt_schedule_common+0x22/0x60 [ 24.094685] _cond_resched+0x1d/0x30 [ 24.098384] unmap_page_range+0x872/0x22e0 [ 24.102605] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.107606] ? check_noncircular+0x20/0x20 [ 24.111838] ? vm_normal_page_pmd+0x2c0/0x2c0 [ 24.116315] ? check_noncircular+0x20/0x20 executing program executing program executing program [ 24.120534] ? check_noncircular+0x20/0x20 [ 24.124754] ? __lock_is_held+0xb6/0x140 [ 24.128805] ? check_noncircular+0x20/0x20 [ 24.133031] ? __lock_is_held+0xb6/0x140 [ 24.137085] ? __gfn_to_hva_many+0x154/0x1b0 [ 24.141487] ? find_held_lock+0x35/0x1d0 [ 24.145545] ? find_held_lock+0x35/0x1d0 [ 24.149601] ? __mmu_notifier_invalidate_range_start+0x209/0x2d0 [ 24.155732] ? lock_downgrade+0x980/0x980 [ 24.159883] ? kvm_mmu_notifier_invalidate_range_start+0x104/0x140 executing program executing program executing program [ 24.166204] ? __mmu_notifier_invalidate_range_start+0x238/0x2d0 [ 24.172353] ? mmu_notifier_unregister+0x5c0/0x5c0 [ 24.177269] ? pagevec_lru_move_fn+0x1ce/0x260 [ 24.181841] ? get_kernel_page+0x110/0x110 [ 24.186081] unmap_single_vma+0x15f/0x2d0 [ 24.190227] zap_page_range+0x35c/0x5f0 [ 24.194192] ? unmap_vmas+0x1b0/0x1b0 [ 24.197977] ? SyS_madvise+0x1021/0x13d0 [ 24.202029] ? lock_release+0xa40/0xa40 [ 24.205996] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.211869] ? blk_start_plug+0xbb/0x370 [ 24.215914] ? rcu_note_context_switch+0x710/0x710 executing program executing program executing program [ 24.220838] ? blk_lld_busy+0x60/0x60 [ 24.224643] ? vmacache_find+0x5f/0x280 [ 24.228607] ? vmacache_update+0xfe/0x130 [ 24.232742] ? find_vma+0x30/0x150 [ 24.236279] SyS_madvise+0xf9e/0x13d0 [ 24.240088] ? madvise_free_pte_range+0x1ea0/0x1ea0 [ 24.245102] ? __close_fd+0x222/0x360 [ 24.248894] ? syscall_return_slowpath+0x2ad/0x550 [ 24.253822] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.258570] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.263309] RIP: 0033:0x448fe7 executing program executing program executing program [ 24.266477] RSP: 002b:00007f7f034c7dd8 EFLAGS: 00000206 ORIG_RAX: 000000000000001c [ 24.274174] RAX: ffffffffffffffda RBX: 00007f7f034c6970 RCX: 0000000000448fe7 [ 24.281434] RDX: 0000000000000004 RSI: 00000000007fb000 RDI: 00007f7f02cc8000 [ 24.288693] RBP: 000000000000003f R08: 0000000000000012 R09: 0000000000000000 [ 24.295956] R10: 00008c0000500000 R11: 0000000000000206 R12: 0000000000000000 [ 24.303215] R13: 00000000ffffffff R14: ffffffffffffffff R15: 00000000206a2000 [ 24.310502] ? entry_SYSCALL_64_fastpath+0x1f/0x96 executing program executing program [ 24.315427] Code: ff 11 4c 89 f9 48 c1 e9 03 42 80 3c 31 00 0f 85 1b 02 00 00 4d 8b 3f 4d 85 ff 0f 84 c0 fd ff ff 49 8d 7f 10 48 89 f9 48 c1 e9 03 <42> 80 3c 31 00 74 ae e8 a7 cc 5b 00 eb a7 4c 89 fe 4c 89 e7 e8 [ 24.334588] RIP: finish_task_switch+0x42d/0x740 RSP: ffff8801c284f3b8 [ 24.341235] ---[ end trace 4048fa81110fa823 ]--- [ 24.346008] Kernel panic - not syncing: Fatal exception [ 24.351803] Dumping ftrace buffer: [ 24.355322] (ftrace buffer empty) [ 24.358999] Kernel Offset: disabled [ 24.362604] Rebooting in 86400 seconds..