[....] Starting enhanced syslogd: rsyslogd[ 10.516116] audit: type=1400 audit(1514197115.667:5): avc: denied { syslog } for pid=2989 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 16.524991] audit: type=1400 audit(1514197121.676:6): avc: denied { map } for pid=3130 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-4,10.128.0.63' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 39.804888] audit: type=1400 audit(1514197144.956:7): avc: denied { map } for pid=3148 comm="syzkaller200506" path="/root/syzkaller200506582" 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 [ 39.830803] audit: type=1400 audit(1514197144.980:8): avc: denied { map } for pid=3148 comm="syzkaller200506" path="/dev/usbmon0" dev="devtmpfs" ino=8877 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 [ 39.858029] page:00000000bb7c9b70 count:0 mapcount:0 mapping: (null) index:0x0 [ 39.866224] flags: 0x2fffc0000000000() [ 39.870116] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 39.877995] raw: ffffea000723c020 ffffea000725bc20 0000000000000000 0000000000000000 [ 39.885864] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 39.892936] ------------[ cut here ]------------ [ 39.897656] kernel BUG at ./include/linux/mm.h:844! [ 39.902672] invalid opcode: 0000 [#1] SMP KASAN [ 39.907310] Dumping ftrace buffer: [ 39.910814] (ftrace buffer empty) [ 39.914490] Modules linked in: [ 39.917651] CPU: 1 PID: 3149 Comm: syzkaller200506 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 39.926189] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.935517] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 39.940498] RSP: 0018:ffff8801c85ef510 EFLAGS: 00010203 [ 39.945829] RAX: 0000000000000000 RBX: 1ffff100390bdea4 RCX: 0000000000000000 [ 39.953065] RDX: 0000000000000000 RSI: 1ffff100390bddee RDI: ffffed00390bde90 [ 39.960304] RBP: ffff8801c85ef5e8 R08: 1ffff100390bddb0 R09: 0000000000000000 [ 39.967543] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100390bdea8 [ 39.974777] R13: dffffc0000000000 R14: ffff8801c85ef840 R15: ffffea0007291480 [ 39.982014] FS: 00007fac34bc9700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 39.990211] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.996058] CR2: 000055f2f3caf0b8 CR3: 00000001cc40c005 CR4: 00000000001606e0 [ 40.003300] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.010537] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.017777] Call Trace: [ 40.020335] ? mon_alloc_buff+0x1a0/0x1a0 [ 40.024452] ? finish_fault+0x1b4/0x2a0 [ 40.028393] ? lock_downgrade+0x980/0x980 [ 40.032507] ? do_swap_page+0x2a10/0x2a10 [ 40.036622] __do_fault+0xeb/0x30f [ 40.040129] ? pte_offset_kernel+0xc7/0xc7 [ 40.044345] ? vma_compute_subtree_gap+0x200/0x200 [ 40.049243] ? check_noncircular+0x20/0x20 [ 40.053443] ? _raw_spin_unlock+0x22/0x30 [ 40.057643] __handle_mm_fault+0x1d8f/0x3ce0 [ 40.062021] ? __pmd_alloc+0x4e0/0x4e0 [ 40.065878] ? find_held_lock+0x35/0x1d0 [ 40.069909] ? handle_mm_fault+0x2a0/0x930 [ 40.074110] ? lock_downgrade+0x980/0x980 [ 40.078234] handle_mm_fault+0x38f/0x930 [ 40.082261] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 40.086808] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 40.092655] ? find_vma+0x30/0x150 [ 40.096163] __get_user_pages+0x50c/0x15f0 [ 40.100368] ? follow_page_mask+0x17f0/0x17f0 [ 40.104829] ? vma_link+0xe9/0x170 [ 40.108339] ? lock_acquire+0x1d5/0x580 [ 40.112275] ? lock_acquire+0x1d5/0x580 [ 40.116217] ? __mm_populate+0x2c7/0x450 [ 40.120245] ? lock_release+0xa40/0xa40 [ 40.124182] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 40.130032] ? rcu_note_context_switch+0x710/0x710 [ 40.134931] populate_vma_page_range+0x20e/0x2f0 [ 40.139653] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 40.144543] ? vmacache_find+0x5f/0x280 [ 40.148479] ? vmacache_update+0xfe/0x130 [ 40.152591] ? find_vma+0x30/0x150 [ 40.156096] __mm_populate+0x23a/0x450 [ 40.159952] ? populate_vma_page_range+0x2f0/0x2f0 [ 40.164847] ? down_read_killable+0x180/0x180 [ 40.169308] ? security_mmap_file+0x143/0x180 [ 40.173775] vm_mmap_pgoff+0x241/0x280 [ 40.177629] ? vma_is_stack_for_current+0xa0/0xa0 [ 40.182436] ? exit_to_usermode_loop+0x198/0x2f0 [ 40.187159] ? kmem_cache_free+0x267/0x2a0 [ 40.191365] SyS_mmap_pgoff+0x462/0x5f0 [ 40.195305] ? find_mergeable_anon_vma+0xd0/0xd0 [ 40.200026] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 40.205006] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 40.209727] SyS_mmap+0x16/0x20 [ 40.212972] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 40.217690] RIP: 0033:0x449479 [ 40.220845] RSP: 002b:00007fac34bc8cd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 40.228517] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449479 [ 40.235752] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 40.242987] RBP: 00000000006dac20 R08: 000000000000000d R09: 0000000000000000 [ 40.250222] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 40.257459] R13: 00007ffeb449354f R14: 00007fac34bc99c0 R15: 0000000000000007 [ 40.264700] 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 [ 40.283768] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c85ef510 [ 40.290289] ---[ end trace 6f59c4987f491f9a ]--- [ 40.295172] Kernel panic - not syncing: Fatal exception [ 40.300539] Dumping ftrace buffer: [ 40.304047] (ftrace buffer empty) [ 40.307722] Kernel Offset: disabled [ 40.311315] Rebooting in 86400 seconds..