[....] Starting enhanced syslogd: rsyslogd[ 10.782588] audit: type=1400 audit(1514137808.873:5): avc: denied { syslog } for pid=2995 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: [ 15.283122] audit: type=1400 audit(1514137813.373:6): avc: denied { map } for pid=3134 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-mmots-kasan-gce-9,10.128.0.22' (ECDSA) to the list of known hosts. executing program executing program executing program [ 21.472065] audit: type=1400 audit(1514137819.562:7): avc: denied { map } for pid=3148 comm="syzkaller190854" path="/root/syzkaller190854105" 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 [ 21.498628] audit: type=1400 audit(1514137819.589:8): avc: denied { map } for pid=3148 comm="syzkaller190854" path="/dev/usbmon0" dev="devtmpfs" ino=8896 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 [ 21.526828] page:ffffea0007284580 count:0 mapcount:0 mapping: (null) index:0x0 [ 21.535054] flags: 0x2fffc0000000000() [ 21.538963] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 21.546848] raw: ffffea00072bc4a0 ffffea0007301fa0 0000000000000000 0000000000000000 [ 21.554731] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 21.561824] ------------[ cut here ]------------ [ 21.566549] kernel BUG at ./include/linux/mm.h:844! [ 21.571698] invalid opcode: 0000 [#1] SMP KASAN [ 21.576364] Dumping ftrace buffer: [ 21.579888] (ftrace buffer empty) [ 21.583576] Modules linked in: [ 21.586750] CPU: 1 PID: 3149 Comm: syzkaller190854 Not tainted 4.15.0-rc4-mm1+ #49 [ 21.594435] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.603781] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 21.608767] RSP: 0018:ffff8801c8d5f510 EFLAGS: 00010203 [ 21.614103] RAX: 0000000000000000 RBX: 1ffff100391abea4 RCX: 0000000000000000 [ 21.621344] RDX: 0000000000000000 RSI: 1ffff100391abdee RDI: ffffed00391abe90 [ 21.628593] RBP: ffff8801c8d5f5e8 R08: 1ffff100391abdb0 R09: 0000000000000000 [ 21.636322] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100391abea8 [ 21.643561] R13: dffffc0000000000 R14: ffff8801c8d5f840 R15: ffffea0007284580 [ 21.650805] FS: 00007feefe802700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 21.659013] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.664862] CR2: 000055b9ea2a7480 CR3: 00000001cb7d3004 CR4: 00000000001606e0 [ 21.672103] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.679347] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.686587] Call Trace: [ 21.689152] ? mon_alloc_buff+0x1a0/0x1a0 [ 21.693272] ? finish_fault+0x1b4/0x2a0 [ 21.697218] ? lock_downgrade+0x980/0x980 [ 21.701331] ? do_swap_page+0x2a10/0x2a10 [ 21.705454] __do_fault+0xeb/0x30f [ 21.708979] ? pte_offset_kernel+0xc7/0xc7 [ 21.713182] ? vma_compute_subtree_gap+0x200/0x200 [ 21.718078] ? check_noncircular+0x20/0x20 [ 21.722285] ? _raw_spin_unlock+0x22/0x30 [ 21.726407] __handle_mm_fault+0x1d8f/0x3ce0 [ 21.730795] ? __pmd_alloc+0x4e0/0x4e0 [ 21.734658] ? find_held_lock+0x35/0x1d0 [ 21.738693] ? handle_mm_fault+0x2a0/0x930 [ 21.742898] ? lock_downgrade+0x980/0x980 [ 21.747034] handle_mm_fault+0x38f/0x930 [ 21.751064] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 21.755611] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 21.761459] ? find_vma+0x30/0x150 [ 21.764969] __get_user_pages+0x50c/0x15f0 [ 21.769178] ? follow_page_mask+0x17f0/0x17f0 [ 21.773637] ? vma_link+0xe9/0x170 [ 21.777148] ? lock_acquire+0x1d5/0x580 [ 21.781089] ? lock_acquire+0x1d5/0x580 [ 21.785034] ? __mm_populate+0x2c7/0x450 [ 21.789065] ? lock_release+0xa40/0xa40 [ 21.793011] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 21.798876] ? rcu_note_context_switch+0x710/0x710 [ 21.803778] populate_vma_page_range+0x20e/0x2f0 [ 21.808502] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 21.813399] ? vmacache_find+0x5f/0x280 [ 21.817342] ? vmacache_update+0xfe/0x130 [ 21.821456] ? find_vma+0x30/0x150 [ 21.824961] __mm_populate+0x23a/0x450 [ 21.828816] ? populate_vma_page_range+0x2f0/0x2f0 [ 21.833709] ? down_read_killable+0x180/0x180 [ 21.838179] ? security_mmap_file+0x143/0x180 [ 21.842644] vm_mmap_pgoff+0x241/0x280 [ 21.846501] ? vma_is_stack_for_current+0xa0/0xa0 [ 21.851316] SyS_mmap_pgoff+0x462/0x5f0 [ 21.855264] ? find_mergeable_anon_vma+0xd0/0xd0 [ 21.859987] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 21.864969] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 21.869692] SyS_mmap+0x16/0x20 [ 21.872940] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 21.877662] RIP: 0033:0x449489 [ 21.880817] RSP: 002b:00007feefe801d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 21.888488] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449489 [ 21.895734] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 21.902975] RBP: 00000000006dac20 R08: 000000000000000c R09: 0000000000000000 [ 21.910217] R10: 0000000000008011 R11: 0000000000000212 R12: 6361632f6376612f [ 21.917454] R13: 78756e696c65732f R14: 6273752f7665642f R15: 000000000000000d [ 21.924700] 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 [ 21.943782] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8d5f510 [ 21.950336] ---[ end trace 161249721e528c55 ]--- [ 21.955190] Kernel panic - not syncing: Fatal exception [ 21.961005] Dumping ftrace buffer: [ 21.964608] (ftrace buffer empty) [ 21.968286] Kernel Offset: disabled [ 21.971878] Rebooting in 86400 seconds..