[....] Starting enhanced syslogd: rsyslogd[ 12.337902] audit: type=1400 audit(1514895380.181:5): avc: denied { syslog } for pid=3343 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: [ 18.988250] audit: type=1400 audit(1514895386.832:6): 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 '10.128.15.239' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 25.213631] audit: type=1400 audit(1514895393.057:7): avc: denied { map } for pid=3497 comm="syzkaller397061" path="/root/syzkaller397061565" 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 [ 25.239586] audit: type=1400 audit(1514895393.057:8): avc: denied { map } for pid=3497 comm="syzkaller397061" 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 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 [ 25.480935] page:00000000a771f65b count:0 mapcount:0 mapping: (null) index:0x0 [ 25.489223] flags: 0x2fffc0000000000() [ 25.493153] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 25.501091] raw: ffffea00074c5720 ffffea000703d560 0000000000000000 0000000000000000 [ 25.509024] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 25.516125] ------------[ cut here ]------------ [ 25.520849] kernel BUG at ./include/linux/mm.h:844! [ 25.525883] invalid opcode: 0000 [#1] SMP KASAN [ 25.530542] Dumping ftrace buffer: [ 25.534057] (ftrace buffer empty) [ 25.537746] Modules linked in: [ 25.540908] CPU: 0 PID: 3498 Comm: syzkaller397061 Not tainted 4.15.0-rc6+ #155 [ 25.548323] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.557652] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.562636] RSP: 0018:ffff8801c4237388 EFLAGS: 00010203 [ 25.567965] RAX: 0000000000000000 RBX: 1ffff10038846e73 RCX: 0000000000000000 [ 25.575205] RDX: 0000000000000000 RSI: 1ffff10038846dbd RDI: ffffed0038846e60 [ 25.582441] RBP: ffff8801c4237460 R08: 1ffff10038846d7f R09: 0000000000000000 [ 25.589679] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038846e77 [ 25.596924] R13: dffffc0000000000 R14: ffff8801c42376b8 R15: ffffea0006ff5ec0 [ 25.604163] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7fbcb40 [ 25.612356] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.618205] CR2: 00000000208be000 CR3: 00000001c03cb002 CR4: 00000000001606f0 [ 25.625446] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.632686] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.639920] Call Trace: [ 25.642482] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.646601] ? finish_fault+0x1b4/0x2a0 [ 25.650543] ? lock_downgrade+0x980/0x980 [ 25.654670] ? do_swap_page+0x2c50/0x2c50 [ 25.658793] __do_fault+0xeb/0x30f [ 25.662307] ? pte_offset_kernel+0xc7/0xc7 [ 25.666510] ? check_noncircular+0x20/0x20 [ 25.670715] ? _raw_spin_unlock+0x22/0x30 [ 25.674830] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.679206] ? __pmd_alloc+0x4e0/0x4e0 [ 25.683060] ? __save_stack_trace+0x7e/0xd0 [ 25.687353] ? find_held_lock+0x35/0x1d0 [ 25.691382] ? handle_mm_fault+0x248/0x8d0 [ 25.695589] ? lock_downgrade+0x980/0x980 [ 25.699713] handle_mm_fault+0x334/0x8d0 [ 25.703740] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.708288] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.714136] ? find_vma+0x30/0x150 [ 25.717645] __get_user_pages+0x50c/0x15f0 [ 25.721851] ? follow_page_mask+0x17f0/0x17f0 [ 25.726315] ? lock_acquire+0x1d5/0x580 [ 25.730253] ? lock_acquire+0x1d5/0x580 [ 25.734190] ? __mm_populate+0x2c7/0x450 [ 25.738225] ? lock_release+0xa40/0xa40 [ 25.742172] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.748021] ? rcu_note_context_switch+0x710/0x710 [ 25.752918] populate_vma_page_range+0x20e/0x2f0 [ 25.757646] ? get_user_pages+0xc0/0xc0 [ 25.761593] ? vmacache_find+0x5f/0x280 [ 25.765533] ? vmacache_update+0xfe/0x130 [ 25.769653] ? find_vma+0x30/0x150 [ 25.773162] __mm_populate+0x23a/0x450 [ 25.777019] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.781915] ? down_read_killable+0x180/0x180 [ 25.786378] ? security_mmap_file+0x143/0x180 [ 25.790848] vm_mmap_pgoff+0x241/0x280 [ 25.794707] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.799515] ? kmem_cache_free+0x267/0x2a0 [ 25.803722] SyS_mmap_pgoff+0x462/0x5f0 [ 25.807668] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.812390] ? compat_SyS_ioctl+0x77/0x2a30 [ 25.816679] ? do_fast_syscall_32+0x156/0xf9d [ 25.821143] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.825863] do_fast_syscall_32+0x3ee/0xf9d [ 25.830153] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.834699] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.840202] ? syscall_return_slowpath+0x2ad/0x550 [ 25.845105] ? sysret32_from_system_call+0x5/0x3b [ 25.849915] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.854732] entry_SYSENTER_compat+0x54/0x63 [ 25.859105] RIP: 0023:0xf7fc0c79 [ 25.862435] RSP: 002b:00000000f7fbc11c EFLAGS: 00000296 ORIG_RAX: 00000000000000c0 [ 25.870113] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 25.877350] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000084 [ 25.884587] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.891831] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.899074] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.906315] 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 [ 25.925384] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c4237388 [ 25.931916] ---[ end trace e430145cc8e1257d ]--- [ 25.936828] Kernel panic - not syncing: Fatal exception [ 25.942187] Dumping ftrace buffer: [ 25.945693] (ftrace buffer empty) [ 25.949368] Kernel Offset: disabled [ 25.952961] Rebooting in 86400 seconds..