[....] Starting enhanced syslogd: rsyslogd[ 10.379837] audit: type=1400 audit(1514768392.453:5): avc: denied { syslog } for pid=2991 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: [ 15.647196] audit: type=1400 audit(1514768397.721:6): 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 '10.128.15.215' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.414054] audit: type=1400 audit(1514768415.487:7): avc: denied { map } for pid=3148 comm="syzkaller087144" path="/root/syzkaller087144159" 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 [ 33.440169] audit: type=1400 audit(1514768415.488:8): avc: denied { map } for pid=3148 comm="syzkaller087144" path="/dev/usbmon0" dev="devtmpfs" ino=8931 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 [ 33.469198] page:ffffea0007295000 count:0 mapcount:0 mapping: (null) index:0x0 [ 33.477443] flags: 0x2fffc0000000000() [ 33.481376] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 33.489263] raw: ffffea0007243d60 ffffea0007291aa0 0000000000000000 0000000000000000 [ 33.497156] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 33.504260] ------------[ cut here ]------------ [ 33.508988] kernel BUG at ./include/linux/mm.h:844! [ 33.514137] invalid opcode: 0000 [#1] SMP KASAN [ 33.518781] Dumping ftrace buffer: [ 33.522304] (ftrace buffer empty) [ 33.525987] Modules linked in: [ 33.529153] CPU: 1 PID: 3149 Comm: syzkaller087144 Not tainted 4.15.0-rc4-mm1+ #49 [ 33.536825] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.546156] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 33.551139] RSP: 0018:ffff8801c9397510 EFLAGS: 00010203 [ 33.556469] RAX: 0000000000000000 RBX: 1ffff10039272ea4 RCX: 0000000000000000 [ 33.563713] RDX: 0000000000000000 RSI: 1ffff10039272dee RDI: ffffed0039272e90 [ 33.570951] RBP: ffff8801c93975e8 R08: 1ffff10039272db0 R09: 0000000000000000 [ 33.578198] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039272ea8 [ 33.585439] R13: dffffc0000000000 R14: ffff8801c9397840 R15: ffffea0007295000 [ 33.592677] FS: 00007f5b5c87a700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 33.600870] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.606719] CR2: 00007fc6758d2518 CR3: 00000001c85af004 CR4: 00000000001606e0 [ 33.613982] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.621229] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.628466] Call Trace: [ 33.631036] ? mon_alloc_buff+0x1a0/0x1a0 [ 33.635167] ? finish_fault+0x1b4/0x2a0 [ 33.639111] ? lock_downgrade+0x980/0x980 [ 33.643224] ? do_swap_page+0x2a10/0x2a10 [ 33.647351] __do_fault+0xeb/0x30f [ 33.650859] ? pte_offset_kernel+0xc7/0xc7 [ 33.655064] ? vma_compute_subtree_gap+0x200/0x200 [ 33.659963] ? check_noncircular+0x20/0x20 [ 33.664168] ? _raw_spin_unlock+0x22/0x30 [ 33.668290] __handle_mm_fault+0x1d8f/0x3ce0 [ 33.672682] ? __pmd_alloc+0x4e0/0x4e0 [ 33.676539] ? find_held_lock+0x35/0x1d0 [ 33.680569] ? handle_mm_fault+0x2a0/0x930 [ 33.684782] ? lock_downgrade+0x980/0x980 [ 33.688917] handle_mm_fault+0x38f/0x930 [ 33.692949] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 33.697502] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.703355] ? find_vma+0x30/0x150 [ 33.706874] __get_user_pages+0x50c/0x15f0 [ 33.711092] ? follow_page_mask+0x17f0/0x17f0 [ 33.715554] ? vma_link+0xe9/0x170 [ 33.719063] ? lock_acquire+0x1d5/0x580 [ 33.723001] ? lock_acquire+0x1d5/0x580 [ 33.726939] ? __mm_populate+0x2c7/0x450 [ 33.730969] ? lock_release+0xa40/0xa40 [ 33.734911] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.740773] ? rcu_note_context_switch+0x710/0x710 [ 33.745677] populate_vma_page_range+0x20e/0x2f0 [ 33.750411] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 33.755314] ? vmacache_find+0x5f/0x280 [ 33.759255] ? vmacache_update+0xfe/0x130 [ 33.763368] ? find_vma+0x30/0x150 [ 33.766886] __mm_populate+0x23a/0x450 [ 33.770752] ? populate_vma_page_range+0x2f0/0x2f0 [ 33.775648] ? down_read_killable+0x180/0x180 [ 33.780115] ? security_mmap_file+0x143/0x180 [ 33.784584] vm_mmap_pgoff+0x241/0x280 [ 33.788443] ? vma_is_stack_for_current+0xa0/0xa0 [ 33.793254] ? lock_downgrade+0x980/0x980 [ 33.797379] SyS_mmap_pgoff+0x462/0x5f0 [ 33.801333] ? find_mergeable_anon_vma+0xd0/0xd0 [ 33.806081] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.811071] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.815795] SyS_mmap+0x16/0x20 [ 33.819042] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 33.823764] RIP: 0033:0x449229 [ 33.826922] RSP: 002b:00007f5b5c879d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 33.834597] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449229 [ 33.841846] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 33.849084] RBP: 0000000000000000 R08: 000000000000001b R09: 0000000000000000 [ 33.856419] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 33.863671] R13: 6273752f7665642f R14: 00007f5b5c87a9c0 R15: 0000000000000005 [ 33.870954] 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 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd [ 33.890029] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c9397510 [ 33.896544] ---[ end trace 0cd3a05fe2d27805 ]--- [ 33.901284] Kernel panic - not syncing: Fatal exception [ 33.906967] Dumping ftrace buffer: [ 33.910476] (ftrace buffer empty) [ 33.914157] Kernel Offset: disabled [ 33.917751] Rebooting in 86400 seconds..