[....] Starting enhanced syslogd: rsyslogd[ 10.141582] audit: type=1400 audit(1514716870.715:5): avc: denied { syslog } for pid=2999 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: [ 12.688254] audit: type=1400 audit(1514716873.262:6): avc: denied { map } for pid=3137 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 '10.128.0.60' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 22.008411] audit: type=1400 audit(1514716882.582:7): avc: denied { map } for pid=3152 comm="syzkaller134832" path="/root/syzkaller134832490" 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 [ 22.034310] audit: type=1400 audit(1514716882.590:8): avc: denied { map } for pid=3152 comm="syzkaller134832" path="/dev/usbmon0" dev="devtmpfs" ino=1138 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 [ 22.069112] page:0000000016b828f7 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.077357] flags: 0x2fffc0000000000() [ 22.081260] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.089154] raw: ffffea000723be60 ffffea00072516e0 0000000000000000 0000000000000000 [ 22.097038] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.104141] ------------[ cut here ]------------ [ 22.108866] kernel BUG at ./include/linux/mm.h:844! [ 22.113898] invalid opcode: 0000 [#1] SMP KASAN [ 22.118536] Dumping ftrace buffer: [ 22.122040] (ftrace buffer empty) [ 22.125717] Modules linked in: [ 22.128880] CPU: 0 PID: 3153 Comm: syzkaller134832 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 22.137416] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.146746] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.151725] RSP: 0018:ffff8801c859f510 EFLAGS: 00010203 [ 22.157054] RAX: 0000000000000000 RBX: 1ffff100390b3ea4 RCX: 0000000000000000 [ 22.164289] RDX: 0000000000000000 RSI: 1ffff100390b3dee RDI: ffffed00390b3e90 [ 22.171526] RBP: ffff8801c859f5e8 R08: 1ffff100390b3db0 R09: 0000000000000000 [ 22.178764] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100390b3ea8 [ 22.186012] R13: dffffc0000000000 R14: ffff8801c859f840 R15: ffffea000726de00 [ 22.193248] FS: 00007fb3d4c83700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.201437] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.207285] CR2: 00000000208be000 CR3: 00000001cac31001 CR4: 00000000001606f0 [ 22.214523] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.221763] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.229005] Call Trace: [ 22.231565] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.235680] ? finish_fault+0x1b4/0x2a0 [ 22.239624] ? lock_downgrade+0x980/0x980 [ 22.243736] ? do_swap_page+0x2a10/0x2a10 [ 22.247852] __do_fault+0xeb/0x30f [ 22.251358] ? pte_offset_kernel+0xc7/0xc7 [ 22.255559] ? vma_compute_subtree_gap+0x200/0x200 [ 22.260460] ? check_noncircular+0x20/0x20 [ 22.264658] ? _raw_spin_unlock+0x22/0x30 [ 22.268774] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.273151] ? __pmd_alloc+0x4e0/0x4e0 [ 22.277007] ? find_held_lock+0x35/0x1d0 [ 22.281038] ? handle_mm_fault+0x2a0/0x930 [ 22.285243] ? lock_downgrade+0x980/0x980 [ 22.289366] handle_mm_fault+0x38f/0x930 [ 22.293392] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.297940] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.303795] ? find_vma+0x30/0x150 [ 22.307302] __get_user_pages+0x50c/0x15f0 [ 22.311505] ? follow_page_mask+0x17f0/0x17f0 [ 22.315965] ? vma_link+0xe9/0x170 [ 22.319471] ? lock_acquire+0x1d5/0x580 [ 22.323407] ? lock_acquire+0x1d5/0x580 [ 22.327343] ? __mm_populate+0x2c7/0x450 [ 22.331373] ? lock_release+0xa40/0xa40 [ 22.335313] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.341163] ? rcu_note_context_switch+0x710/0x710 [ 22.346060] populate_vma_page_range+0x20e/0x2f0 [ 22.350781] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 22.355680] ? vmacache_find+0x5f/0x280 [ 22.359617] ? vmacache_update+0xfe/0x130 [ 22.363732] ? find_vma+0x30/0x150 [ 22.367239] __mm_populate+0x23a/0x450 [ 22.371101] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.376002] ? down_read_killable+0x180/0x180 [ 22.380465] ? security_mmap_file+0x143/0x180 [ 22.384931] vm_mmap_pgoff+0x241/0x280 [ 22.388790] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.393597] ? putname+0xee/0x130 [ 22.397013] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.401993] ? kmem_cache_free+0x267/0x2a0 [ 22.406195] SyS_mmap_pgoff+0x462/0x5f0 [ 22.410135] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.414857] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.419844] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.424568] SyS_mmap+0x16/0x20 [ 22.427814] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.432537] RIP: 0033:0x449269 [ 22.435693] RSP: 002b:00007fb3d4c82d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 22.443368] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449269 [ 22.450607] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.457845] RBP: 00000000006dac20 R08: 0000000000000019 R09: 0000000000000000 [ 22.465083] R10: 0000000000008011 R11: 0000000000000212 R12: 6273752f7665642f [ 22.472330] R13: 702f74656e2f666c R14: 65732f636f72702f R15: 0000000000000005 [ 22.479590] 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 [ 22.498658] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c859f510 [ 22.505176] ---[ end trace 3af6d1d038d6aa5f ]--- [ 22.509918] Kernel panic - not syncing: Fatal exception [ 22.515582] Dumping ftrace buffer: [ 22.519086] (ftrace buffer empty) [ 22.522762] Kernel Offset: disabled [ 22.526356] Rebooting in 86400 seconds..