[....] Starting enhanced syslogd: rsyslogd[ 10.996939] audit: type=1400 audit(1514760359.164:5): avc: denied { syslog } for pid=2994 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: [ 16.930751] audit: type=1400 audit(1514760365.098:6): 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 '10.128.15.216' (ECDSA) to the list of known hosts. executing program [ 23.130540] audit: type=1400 audit(1514760371.298:7): avc: denied { map } for pid=3150 comm="syzkaller313502" path="/root/syzkaller313502066" 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 [ 23.167359] audit: type=1400 audit(1514760371.335:8): avc: denied { map } for pid=3150 comm="syzkaller313502" path="/dev/usbmon0" dev="devtmpfs" ino=8940 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 executing program [ 23.248401] page:ffffea000722aa80 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.256691] flags: 0x2fffc0000000000() [ 23.260831] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffff80 [ 23.268961] raw: ffffea0007208760 ffff88021fffab40 0000000000000000 0000000000000000 [ 23.277387] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.284499] ------------[ cut here ]------------ [ 23.289238] kernel BUG at ./include/linux/mm.h:844! [ 23.294278] invalid opcode: 0000 [#1] SMP KASAN [ 23.298923] Dumping ftrace buffer: [ 23.302431] (ftrace buffer empty) [ 23.306122] Modules linked in: [ 23.309294] CPU: 1 PID: 3154 Comm: syzkaller313502 Not tainted 4.15.0-rc4-mm1+ #49 [ 23.316966] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.326303] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.331301] RSP: 0018:ffff8801c8b17510 EFLAGS: 00010203 [ 23.336632] RAX: 0000000000000000 RBX: 1ffff10039162ea4 RCX: 0000000000000000 [ 23.343876] RDX: 0000000000000000 RSI: 1ffff10039162dee RDI: ffffed0039162e90 [ 23.351122] RBP: ffff8801c8b175e8 R08: 1ffff10039162db0 R09: 0000000000000000 [ 23.358396] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039162ea8 [ 23.365671] R13: dffffc0000000000 R14: ffff8801c8b17840 R15: ffffea000722aa80 [ 23.372920] FS: 00007f0ea737d700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.381121] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.386974] CR2: 00007fdc80ec7000 CR3: 00000001c8b37002 CR4: 00000000001606e0 [ 23.394215] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.401453] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.408696] Call Trace: [ 23.411268] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.415398] ? finish_fault+0x1b4/0x2a0 [ 23.419352] ? lock_downgrade+0x980/0x980 [ 23.423467] ? do_swap_page+0x2a10/0x2a10 [ 23.427941] __do_fault+0xeb/0x30f [ 23.431464] ? pte_offset_kernel+0xc7/0xc7 [ 23.435693] ? vma_compute_subtree_gap+0x200/0x200 [ 23.440617] ? check_noncircular+0x20/0x20 [ 23.445084] ? _raw_spin_unlock+0x22/0x30 [ 23.449211] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.453597] ? __pmd_alloc+0x4e0/0x4e0 [ 23.457461] ? find_held_lock+0x35/0x1d0 [ 23.461500] ? handle_mm_fault+0x2a0/0x930 [ 23.465713] ? lock_downgrade+0x980/0x980 [ 23.469929] handle_mm_fault+0x38f/0x930 [ 23.473968] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.478534] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.484393] ? find_vma+0x30/0x150 [ 23.487917] __get_user_pages+0x50c/0x15f0 [ 23.492131] ? follow_page_mask+0x17f0/0x17f0 [ 23.496609] ? vma_link+0xe9/0x170 [ 23.500126] ? lock_acquire+0x1d5/0x580 [ 23.504067] ? lock_acquire+0x1d5/0x580 [ 23.508012] ? __mm_populate+0x2c7/0x450 [ 23.512145] ? lock_release+0xa40/0xa40 [ 23.516097] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.521951] ? rcu_note_context_switch+0x710/0x710 [ 23.526859] populate_vma_page_range+0x20e/0x2f0 [ 23.531585] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 23.536479] ? vmacache_find+0x5f/0x280 [ 23.540418] ? vmacache_update+0xfe/0x130 [ 23.544535] ? find_vma+0x30/0x150 [ 23.548044] __mm_populate+0x23a/0x450 [ 23.551902] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.556796] ? down_read_killable+0x180/0x180 [ 23.561259] ? security_mmap_file+0x143/0x180 [ 23.565725] vm_mmap_pgoff+0x241/0x280 [ 23.569582] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.574400] ? exit_to_usermode_loop+0x198/0x2f0 [ 23.579130] SyS_mmap_pgoff+0x462/0x5f0 [ 23.583072] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.587806] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.592795] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.597530] SyS_mmap+0x16/0x20 [ 23.600784] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.605511] RIP: 0033:0x449319 [ 23.608669] RSP: 002b:00007f0ea737cd98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 23.616344] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000449319 [ 23.623587] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.630822] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000000 [ 23.638059] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac38 [ 23.645308] R13: 6273752f7665642f R14: 00007f0ea737d9c0 R15: 0000000000000007 [ 23.652552] 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 [ 23.671629] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8b17510 [ 23.678149] ---[ end trace dd87ff7692d4b952 ]--- [ 23.682904] Kernel panic - not syncing: Fatal exception [ 23.688697] Dumping ftrace buffer: [ 23.692209] (ftrace buffer empty) [ 23.695886] Kernel Offset: disabled [ 23.699486] Rebooting in 86400 seconds..