[....] Starting enhanced syslogd: rsyslogd[ 12.484267] audit: type=1400 audit(1514895374.512:5): avc: denied { syslog } for pid=3345 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: [ 17.290800] audit: type=1400 audit(1514895379.319:6): avc: denied { map } for pid=3483 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 '10.128.0.17' (ECDSA) to the list of known hosts. executing program executing program executing program [ 23.519436] audit: type=1400 audit(1514895385.548:7): avc: denied { map } for pid=3498 comm="syzkaller407038" path="/root/syzkaller407038460" 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 [ 23.546842] audit: type=1400 audit(1514895385.575:8): avc: denied { map } for pid=3498 comm="syzkaller407038" path="/dev/usbmon0" dev="devtmpfs" ino=8929 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 [ 23.572517] page:0000000041a65937 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.580792] flags: 0x2fffc0000000000() [ 23.584721] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.592632] raw: ffffea000712e2e0 ffffea0007236f60 0000000000000000 0000000000000000 [ 23.600508] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.607643] ------------[ cut here ]------------ [ 23.612372] kernel BUG at ./include/linux/mm.h:844! [ 23.617410] invalid opcode: 0000 [#1] SMP KASAN [ 23.622049] Dumping ftrace buffer: [ 23.625556] (ftrace buffer empty) [ 23.629232] Modules linked in: [ 23.632396] CPU: 0 PID: 3499 Comm: syzkaller407038 Not tainted 4.15.0-rc6+ #245 [ 23.639806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.649140] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.654132] RSP: 0018:ffff8801c019f510 EFLAGS: 00010203 [ 23.659462] RAX: 0000000000000000 RBX: 1ffff10038033ea4 RCX: 0000000000000000 [ 23.666700] RDX: 0000000000000000 RSI: 1ffff10038033dee RDI: ffffed0038033e90 [ 23.673940] RBP: ffff8801c019f5e8 R08: 1ffff10038033db0 R09: 0000000000000000 [ 23.681184] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038033ea8 [ 23.688424] R13: dffffc0000000000 R14: ffff8801c019f840 R15: ffffea0007238880 [ 23.695665] FS: 00007f8192dff700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.703876] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.709725] CR2: 00005620676b0088 CR3: 00000001c0a19006 CR4: 00000000001606f0 [ 23.716967] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.724206] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.731450] Call Trace: [ 23.734015] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.738134] ? find_held_lock+0x35/0x1d0 [ 23.742172] __do_fault+0xeb/0x30f [ 23.745683] ? vma_gap_callbacks_rotate+0x62/0x80 [ 23.750501] ? pte_offset_kernel+0xc7/0xc7 [ 23.754702] ? print_irqtrace_events+0x270/0x270 [ 23.759426] ? rb_insert_color_cached+0x1660/0x1660 [ 23.764410] ? vma_compute_subtree_gap+0x200/0x200 [ 23.769315] ? check_noncircular+0x20/0x20 [ 23.773520] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.777899] ? __pmd_alloc+0x4e0/0x4e0 [ 23.781754] ? __save_stack_trace+0x7e/0xd0 [ 23.786044] ? find_held_lock+0x35/0x1d0 [ 23.790075] ? handle_mm_fault+0x248/0x8d0 [ 23.794275] ? lock_downgrade+0x980/0x980 [ 23.798400] handle_mm_fault+0x334/0x8d0 [ 23.802429] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.806986] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.812839] ? find_vma+0x30/0x150 [ 23.816350] __get_user_pages+0x50c/0x15f0 [ 23.820558] ? follow_page_mask+0x17f0/0x17f0 [ 23.825026] ? lock_acquire+0x1d5/0x580 [ 23.828965] ? lock_acquire+0x1d5/0x580 [ 23.832904] ? __mm_populate+0x2c7/0x450 [ 23.836950] ? lock_release+0xa40/0xa40 [ 23.840893] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.846752] ? rcu_note_context_switch+0x710/0x710 [ 23.851757] populate_vma_page_range+0x20e/0x2f0 [ 23.856491] ? get_user_pages+0xc0/0xc0 [ 23.860435] ? vmacache_find+0x5f/0x280 [ 23.864383] ? vmacache_update+0xfe/0x130 [ 23.869828] ? find_vma+0x30/0x150 [ 23.873341] __mm_populate+0x23a/0x450 [ 23.877215] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.882116] ? down_read_killable+0x180/0x180 [ 23.886587] ? security_mmap_file+0x143/0x180 [ 23.891064] vm_mmap_pgoff+0x241/0x280 [ 23.894927] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.899746] SyS_mmap_pgoff+0x462/0x5f0 [ 23.903694] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.908428] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.913432] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.918165] SyS_mmap+0x16/0x20 [ 23.921413] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.926136] RIP: 0033:0x4498c9 [ 23.929296] RSP: 002b:00007f8192dfecd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 23.936969] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004498c9 [ 23.944223] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.951460] RBP: 00000000006dac20 R08: 000000000000000e R09: 0000000000000000 [ 23.958703] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 23.965940] R13: 00007fff9f1bb62f R14: 00007f8192dff9c0 R15: 0000000000000009 [ 23.973183] 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 2b b0 94 fd 48 c7 c6 20 b1 12 86 4c 89 ff e8 bc 98 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 07 b0 94 fd [ 23.992345] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c019f510 [ 23.998899] ---[ end trace e9a0a4ff95d4def8 ]--- [ 24.003839] Kernel panic - not syncing: Fatal exception [ 24.009549] Dumping ftrace buffer: [ 24.013065] (ftrace buffer empty) [ 24.016744] Kernel Offset: disabled [ 24.020342] Rebooting in 86400 seconds..