[....] Starting enhanced syslogd: rsyslogd[ 11.395424] audit: type=1400 audit(1514811240.554:5): avc: denied { syslog } for pid=3339 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: [ 15.996727] audit: type=1400 audit(1514811245.155:6): avc: denied { map } for pid=3478 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 '10.128.0.2' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 22.217349] audit: type=1400 audit(1514811251.376:7): avc: denied { map } for pid=3492 comm="syzkaller955310" path="/root/syzkaller955310161" 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 [ 22.243448] audit: type=1400 audit(1514811251.385:8): avc: denied { map } for pid=3492 comm="syzkaller955310" path="/dev/usbmon0" dev="devtmpfs" ino=8943 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 [ 22.272338] page:0000000015dae083 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.280581] flags: 0x2fffc0000000000() [ 22.284588] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.292506] raw: ffffea00070088a0 ffffea0007008b60 0000000000000000 0000000000000000 [ 22.300388] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.307522] ------------[ cut here ]------------ [ 22.312256] kernel BUG at ./include/linux/mm.h:844! [ 22.317312] invalid opcode: 0000 [#1] SMP KASAN [ 22.321956] Dumping ftrace buffer: [ 22.325472] (ftrace buffer empty) [ 22.329148] Modules linked in: [ 22.332308] CPU: 0 PID: 3493 Comm: syzkaller955310 Not tainted 4.15.0-rc6+ #245 [ 22.339714] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.349039] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.354021] RSP: 0018:ffff8801c032f510 EFLAGS: 00010203 [ 22.359348] RAX: 0000000000000000 RBX: 1ffff10038065ea4 RCX: 0000000000000000 [ 22.366583] RDX: 0000000000000000 RSI: 1ffff10038065dee RDI: ffffed0038065e90 [ 22.373818] RBP: ffff8801c032f5e8 R08: 1ffff10038065db0 R09: 0000000000000000 [ 22.381060] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038065ea8 [ 22.388296] R13: dffffc0000000000 R14: ffff8801c032f840 R15: ffffea0007008b00 [ 22.395532] FS: 00007f4acf6cf700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.403737] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.409583] CR2: 00000000208be000 CR3: 00000001c16e7001 CR4: 00000000001606f0 [ 22.416821] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.424057] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.431290] Call Trace: [ 22.433846] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.437965] ? find_held_lock+0x35/0x1d0 [ 22.441998] __do_fault+0xeb/0x30f [ 22.445508] ? vma_gap_callbacks_rotate+0x62/0x80 [ 22.450315] ? pte_offset_kernel+0xc7/0xc7 [ 22.454517] ? print_irqtrace_events+0x270/0x270 [ 22.459244] ? rb_insert_color_cached+0x1660/0x1660 [ 22.464226] ? vma_compute_subtree_gap+0x200/0x200 [ 22.469121] ? check_noncircular+0x20/0x20 [ 22.473324] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.477699] ? __pmd_alloc+0x4e0/0x4e0 [ 22.481551] ? __save_stack_trace+0x7e/0xd0 [ 22.485840] ? find_held_lock+0x35/0x1d0 [ 22.489868] ? handle_mm_fault+0x248/0x8d0 [ 22.494068] ? lock_downgrade+0x980/0x980 [ 22.498202] handle_mm_fault+0x334/0x8d0 [ 22.502231] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.506778] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.512627] ? find_vma+0x30/0x150 [ 22.516135] __get_user_pages+0x50c/0x15f0 [ 22.520345] ? follow_page_mask+0x17f0/0x17f0 [ 22.524811] ? lock_acquire+0x1d5/0x580 [ 22.528748] ? lock_acquire+0x1d5/0x580 [ 22.532686] ? __mm_populate+0x2c7/0x450 [ 22.536728] ? lock_release+0xa40/0xa40 [ 22.540679] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.546534] ? rcu_note_context_switch+0x710/0x710 [ 22.551432] populate_vma_page_range+0x20e/0x2f0 [ 22.556154] ? get_user_pages+0xc0/0xc0 [ 22.560093] ? vmacache_find+0x5f/0x280 [ 22.564033] ? vmacache_update+0xfe/0x130 [ 22.568150] ? find_vma+0x30/0x150 [ 22.571656] __mm_populate+0x23a/0x450 [ 22.575510] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.580408] ? down_read_killable+0x180/0x180 [ 22.584882] ? security_mmap_file+0x143/0x180 [ 22.589347] vm_mmap_pgoff+0x241/0x280 [ 22.593206] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.598017] ? putname+0xee/0x130 [ 22.601439] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.606420] ? kmem_cache_free+0x267/0x2a0 [ 22.610626] SyS_mmap_pgoff+0x462/0x5f0 [ 22.614573] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.619295] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.624277] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.629000] SyS_mmap+0x16/0x20 [ 22.632251] entry_SYSCALL_64_fastpath+0x23/0x9a [ 22.636973] RIP: 0033:0x449229 [ 22.640129] RSP: 002b:00007f4acf6ced98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 22.647802] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449229 [ 22.655040] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.662275] RBP: 0000000000000000 R08: 000000000000000c R09: 0000000000000000 [ 22.669510] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 22.676750] R13: 6273752f7665642f R14: 00007f4acf6cf9c0 R15: 0000000000000005 [ 22.683993] 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 [ 22.703077] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c032f510 [ 22.709590] ---[ end trace 7f73308565cb576d ]--- [ 22.714351] Kernel panic - not syncing: Fatal exception [ 22.719735] Dumping ftrace buffer: [ 22.723244] (ftrace buffer empty) [ 22.726930] Kernel Offset: disabled [ 22.730523] Rebooting in 86400 seconds..