[....] Starting enhanced syslogd: rsyslogd[ 11.881283] audit: type=1400 audit(1514178511.193:5): avc: denied { syslog } for pid=3010 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: [ 18.676309] audit: type=1400 audit(1514178517.987:6): avc: denied { map } for pid=3150 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-5,10.128.0.24' (ECDSA) to the list of known hosts. executing program executing program executing program [ 24.863720] audit: type=1400 audit(1514178524.175:7): avc: denied { map } for pid=3164 comm="syzkaller017173" path="/root/syzkaller017173549" 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 [ 24.889793] audit: type=1400 audit(1514178524.175:8): avc: denied { map } for pid=3164 comm="syzkaller017173" path="/dev/usbmon0" dev="devtmpfs" ino=1078 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbmon_device_t:s0 tclass=chr_file permissive=1 [ 24.923515] page:000000002886cc24 count:0 mapcount:0 mapping: (null) index:0x0 [ 24.931752] flags: 0x2fffc0000000000() [ 24.935656] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.944552] raw: ffffea00071f0220 ffffea00072377e0 0000000000000000 0000000000000000 [ 24.955663] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.963284] ------------[ cut here ]------------ [ 24.968015] kernel BUG at ./include/linux/mm.h:844! [ 24.973065] invalid opcode: 0000 [#1] SMP KASAN [ 24.977734] Dumping ftrace buffer: [ 24.982716] (ftrace buffer empty) [ 24.987641] Modules linked in: [ 24.992111] CPU: 0 PID: 3165 Comm: syzkaller017173 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 25.000650] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.009983] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.014965] RSP: 0018:ffff8801c7d07510 EFLAGS: 00010203 [ 25.020295] RAX: 0000000000000000 RBX: 1ffff10038fa0ea4 RCX: 0000000000000000 [ 25.027537] RDX: 0000000000000000 RSI: 1ffff10038fa0dee RDI: ffffed0038fa0e90 [ 25.034777] RBP: ffff8801c7d075e8 R08: 1ffff10038fa0db0 R09: 0000000000000000 [ 25.042017] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038fa0ea8 [ 25.049254] R13: dffffc0000000000 R14: ffff8801c7d07840 R15: ffffea0007219c40 [ 25.056497] FS: 00007f7837417700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.064693] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.072717] CR2: 0000000020000a71 CR3: 00000001c8cfc005 CR4: 00000000001606f0 [ 25.082733] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.092660] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.102562] Call Trace: [ 25.105908] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.111567] ? finish_fault+0x1b4/0x2a0 [ 25.116899] ? lock_downgrade+0x980/0x980 [ 25.122835] ? do_swap_page+0x2a10/0x2a10 [ 25.128079] __do_fault+0xeb/0x30f [ 25.133062] ? pte_offset_kernel+0xc7/0xc7 [ 25.138654] ? vma_compute_subtree_gap+0x200/0x200 [ 25.143559] ? check_noncircular+0x20/0x20 [ 25.147761] ? _raw_spin_unlock+0x22/0x30 [ 25.151878] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.156257] ? __pmd_alloc+0x4e0/0x4e0 [ 25.160114] ? find_held_lock+0x35/0x1d0 [ 25.164150] ? handle_mm_fault+0x2a0/0x930 [ 25.168352] ? lock_downgrade+0x980/0x980 [ 25.172479] handle_mm_fault+0x38f/0x930 [ 25.176514] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.181062] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.186913] ? find_vma+0x30/0x150 [ 25.190429] __get_user_pages+0x50c/0x15f0 [ 25.194636] ? follow_page_mask+0x17f0/0x17f0 [ 25.199103] ? vma_link+0xe9/0x170 [ 25.202613] ? lock_acquire+0x1d5/0x580 [ 25.206550] ? lock_acquire+0x1d5/0x580 [ 25.210489] ? __mm_populate+0x2c7/0x450 [ 25.214522] ? lock_release+0xa40/0xa40 [ 25.219685] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.226928] ? rcu_note_context_switch+0x710/0x710 [ 25.231829] populate_vma_page_range+0x20e/0x2f0 [ 25.236553] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 25.241446] ? vmacache_find+0x5f/0x280 [ 25.245387] ? vmacache_update+0xfe/0x130 [ 25.249503] ? find_vma+0x30/0x150 [ 25.253015] __mm_populate+0x23a/0x450 [ 25.256880] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.261788] ? down_read_killable+0x180/0x180 [ 25.266253] ? security_mmap_file+0x143/0x180 [ 25.270720] vm_mmap_pgoff+0x241/0x280 [ 25.274578] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.279394] SyS_mmap_pgoff+0x462/0x5f0 [ 25.283339] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.288065] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.294090] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.300575] SyS_mmap+0x16/0x20 [ 25.303827] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 25.308547] RIP: 0033:0x449489 [ 25.311705] RSP: 002b:00007f7837416d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 25.319387] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449489 [ 25.326628] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 25.333866] RBP: 00000000006dac20 R08: 0000000000000010 R09: 0000000000000000 [ 25.341105] R10: 0000000000008011 R11: 0000000000000212 R12: 6361632f6376612f [ 25.348346] R13: 78756e696c65732f R14: 6273752f7665642f R15: 000000000000000d [ 25.355593] Code: 00 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 41 bc 02 00 00 00 eb bb e8 eb f2 96 fd 48 c7 c6 20 1f d1 85 4c 89 ff e8 8c b4 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 f2 96 fd [ 25.374686] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c7d07510 [ 25.383046] ---[ end trace ef1c54706e64b1b0 ]--- [ 25.389727] Kernel panic - not syncing: Fatal exception [ 25.395951] Dumping ftrace buffer: [ 25.399464] (ftrace buffer empty) [ 25.403145] Kernel Offset: disabled [ 25.406741] Rebooting in 86400 seconds..