[....] Starting enhanced syslogd: rsyslogd[ 10.914143] audit: type=1400 audit(1514779633.996:5): avc: denied { syslog } for pid=2998 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: [ 16.225775] audit: type=1400 audit(1514779639.307:6): avc: denied { map } for pid=3141 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 '10.128.15.202' (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 [ 22.390064] audit: type=1400 audit(1514779645.471:7): avc: denied { map } for pid=3155 comm="syzkaller667996" path="/root/syzkaller667996778" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 22.417180] audit: type=1400 audit(1514779645.472:8): avc: denied { map } for pid=3156 comm="syzkaller667996" path="/dev/usbmon0" dev="devtmpfs" ino=103 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 22.592174] page:000000008732fdb9 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.600455] flags: 0x2fffc0000000000() [ 22.604354] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.612250] raw: ffffea00072dd420 ffffea00073ebda0 0000000000000000 0000000000000000 [ 22.620135] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.627811] ------------[ cut here ]------------ [ 22.632539] kernel BUG at ./include/linux/mm.h:844! [ 22.637563] invalid opcode: 0000 [#1] SMP KASAN [ 22.642209] Dumping ftrace buffer: [ 22.645722] (ftrace buffer empty) [ 22.649399] Modules linked in: [ 22.652561] CPU: 0 PID: 3157 Comm: syzkaller667996 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 22.661098] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.670429] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.675409] RSP: 0018:ffff8801c8837510 EFLAGS: 00010203 [ 22.680746] RAX: 0000000000000000 RBX: 1ffff10039106ea4 RCX: 0000000000000000 [ 22.687983] RDX: 0000000000000000 RSI: 1ffff10039106dee RDI: ffffed0039106e90 [ 22.695220] RBP: ffff8801c88375e8 R08: 1ffff10039106db0 R09: 0000000000000000 [ 22.702457] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039106ea8 [ 22.709694] R13: dffffc0000000000 R14: ffff8801c8837840 R15: ffffea00073ea780 [ 22.716933] FS: 00007f1144ee0700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.725149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.731006] CR2: 00000000208be000 CR3: 00000001c7e0d002 CR4: 00000000001606f0 [ 22.738251] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.745487] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.752725] Call Trace: [ 22.755284] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.759402] ? finish_fault+0x1b4/0x2a0 [ 22.763343] ? lock_downgrade+0x980/0x980 [ 22.767457] ? do_swap_page+0x2a10/0x2a10 [ 22.771573] __do_fault+0xeb/0x30f [ 22.775081] ? pte_offset_kernel+0xc7/0xc7 [ 22.779288] ? check_noncircular+0x20/0x20 [ 22.783487] ? _raw_spin_unlock+0x22/0x30 [ 22.787606] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.791983] ? __pmd_alloc+0x4e0/0x4e0 [ 22.795842] ? find_held_lock+0x35/0x1d0 [ 22.799874] ? handle_mm_fault+0x2a0/0x930 [ 22.804078] ? lock_downgrade+0x980/0x980 [ 22.808205] handle_mm_fault+0x38f/0x930 [ 22.812236] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.816787] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.822638] ? find_vma+0x30/0x150 [ 22.826148] __get_user_pages+0x50c/0x15f0 [ 22.830358] ? follow_page_mask+0x17f0/0x17f0 [ 22.834823] ? vma_link+0xe9/0x170 [ 22.838335] ? lock_acquire+0x1d5/0x580 [ 22.842276] ? lock_acquire+0x1d5/0x580 [ 22.846220] ? __mm_populate+0x2c7/0x450 [ 22.850251] ? lock_release+0xa40/0xa40 [ 22.854191] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.860043] ? rcu_note_context_switch+0x710/0x710 [ 22.864943] populate_vma_page_range+0x20e/0x2f0 [ 22.869669] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 22.874564] ? vmacache_find+0x5f/0x280 [ 22.878503] ? vmacache_update+0xfe/0x130 [ 22.882617] ? find_vma+0x30/0x150 [ 22.886123] __mm_populate+0x23a/0x450 [ 22.889979] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.894873] ? down_read_killable+0x180/0x180 [ 22.899335] ? security_mmap_file+0x143/0x180 [ 22.903803] vm_mmap_pgoff+0x241/0x280 [ 22.907660] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.912469] ? lock_downgrade+0x980/0x980 [ 22.916591] SyS_mmap_pgoff+0x462/0x5f0 [ 22.920532] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.925254] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.930240] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.934963] SyS_mmap+0x16/0x20 [ 22.938212] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.942934] RIP: 0033:0x449a69 [ 22.946090] RSP: 002b:00007f1144edfd98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 22.953762] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000449a69 [ 22.960997] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.968237] RBP: 0000000000000000 R08: 0000000000000083 R09: 0000000000000000 [ 22.975474] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dbc20 [ 22.982711] R13: 6273752f7665642f R14: 00007f1144ee09c0 R15: 0000000000000005 [ 22.989954] 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 [ 23.009045] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8837510 [ 23.015578] ---[ end trace 59289bc1e3c33150 ]--- [ 23.020486] Kernel panic - not syncing: Fatal exception [ 23.026287] Dumping ftrace buffer: [ 23.029804] (ftrace buffer empty) [ 23.033482] Kernel Offset: disabled [ 23.037077] Rebooting in 86400 seconds..