[....] Starting enhanced syslogd: rsyslogd[ 12.494630] audit: type=1400 audit(1515373656.154:5): avc: denied { syslog } for pid=3342 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: [ 18.230561] audit: type=1400 audit(1515373661.890:6): avc: denied { map } for pid=3481 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 '10.128.15.206' (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 executing program executing program executing program executing program executing program executing program [ 24.425130] audit: type=1400 audit(1515373668.084:7): avc: denied { map } for pid=3495 comm="syzkaller859463" path="/root/syzkaller859463707" 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 [ 24.451061] audit: type=1400 audit(1515373668.092:8): avc: denied { map } for pid=3495 comm="syzkaller859463" path="/dev/usbmon0" dev="devtmpfs" ino=132 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 [ 24.533315] page:ffffea0007005d00 count:0 mapcount:0 mapping: (null) index:0x0 [ 24.541606] flags: 0x2fffc0000000000() [ 24.545545] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.553448] raw: ffffea0007023e60 ffffea000702d9e0 0000000000000000 0000000000000000 [ 24.561356] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.568465] ------------[ cut here ]------------ [ 24.573192] kernel BUG at ./include/linux/mm.h:844! [ 24.578231] invalid opcode: 0000 [#1] SMP KASAN [ 24.582871] Dumping ftrace buffer: [ 24.586379] (ftrace buffer empty) [ 24.590059] Modules linked in: [ 24.593222] CPU: 1 PID: 3496 Comm: syzkaller859463 Not tainted 4.15.0-rc6+ #161 [ 24.600632] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.609968] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 24.614954] RSP: 0018:ffff8801bf937388 EFLAGS: 00010203 [ 24.620284] RAX: 0000000000000000 RBX: 1ffff10037f26e73 RCX: 0000000000000000 [ 24.627527] RDX: 0000000000000000 RSI: 1ffff10037f26dbd RDI: ffffed0037f26e60 [ 24.634763] RBP: ffff8801bf937460 R08: 1ffff10037f26d7f R09: 0000000000000000 [ 24.642005] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037f26e77 [ 24.649247] R13: dffffc0000000000 R14: ffff8801bf9376b8 R15: ffffea0007005d00 [ 24.656489] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f8cb40 [ 24.664688] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 24.670540] CR2: 00000000208be000 CR3: 00000001c0ee3006 CR4: 00000000001606e0 [ 24.677785] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.685035] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.692292] Call Trace: [ 24.694870] ? mon_alloc_buff+0x1a0/0x1a0 [ 24.699017] ? finish_fault+0x1b4/0x2a0 [ 24.702986] ? lock_downgrade+0x980/0x980 [ 24.707116] ? do_swap_page+0x2c50/0x2c50 [ 24.711248] __do_fault+0xeb/0x30f [ 24.714759] ? pte_offset_kernel+0xc7/0xc7 [ 24.718970] ? check_noncircular+0x20/0x20 [ 24.723175] ? _raw_spin_unlock+0x22/0x30 [ 24.727296] __handle_mm_fault+0x1d8f/0x3ce0 [ 24.731676] ? __pmd_alloc+0x4e0/0x4e0 [ 24.735530] ? __save_stack_trace+0x7e/0xd0 [ 24.739822] ? find_held_lock+0x35/0x1d0 [ 24.743855] ? handle_mm_fault+0x248/0x8d0 [ 24.748058] ? lock_downgrade+0x980/0x980 [ 24.752187] handle_mm_fault+0x334/0x8d0 [ 24.756225] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.760776] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.766636] ? find_vma+0x30/0x150 [ 24.770148] __get_user_pages+0x50c/0x15f0 [ 24.774365] ? follow_page_mask+0x17f0/0x17f0 [ 24.778836] ? lock_acquire+0x1d5/0x580 [ 24.782783] ? lock_acquire+0x1d5/0x580 [ 24.786731] ? __mm_populate+0x2c7/0x450 [ 24.790767] ? lock_release+0xa40/0xa40 [ 24.794712] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.800563] ? rcu_note_context_switch+0x710/0x710 [ 24.805467] populate_vma_page_range+0x20e/0x2f0 [ 24.810192] ? get_user_pages+0xc0/0xc0 [ 24.814138] ? vmacache_find+0x5f/0x280 [ 24.818088] ? vmacache_update+0xfe/0x130 [ 24.822222] ? find_vma+0x30/0x150 [ 24.825733] __mm_populate+0x23a/0x450 [ 24.829590] ? populate_vma_page_range+0x2f0/0x2f0 [ 24.834486] ? down_read_killable+0x180/0x180 [ 24.838951] ? security_mmap_file+0x143/0x180 [ 24.843416] vm_mmap_pgoff+0x241/0x280 [ 24.847275] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.852086] ? get_unused_fd_flags+0x121/0x190 [ 24.856634] ? __alloc_fd+0x750/0x750 [ 24.860403] ? kmem_cache_free+0x267/0x2a0 [ 24.864623] SyS_mmap_pgoff+0x462/0x5f0 [ 24.868572] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.873299] ? do_fast_syscall_32+0x156/0xf9d [ 24.877773] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.882517] do_fast_syscall_32+0x3ee/0xf9d [ 24.886826] ? do_int80_syscall_32+0x9d0/0x9d0 [ 24.891382] ? syscall_return_slowpath+0x2ad/0x550 [ 24.896277] ? prepare_exit_to_usermode+0x340/0x340 [ 24.901260] ? sysret32_from_system_call+0x5/0x3b [ 24.906072] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.910896] entry_SYSENTER_compat+0x54/0x63 [ 24.915278] RIP: 0023:0xf7f90c79 [ 24.918611] RSP: 002b:00000000f7f8c1ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 24.926296] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 24.933544] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000082 [ 24.940788] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 24.948038] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 24.955293] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 24.962549] 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 bb 9d 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 cc 8a bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 97 9d 94 fd [ 24.981632] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bf937388 [ 24.988242] ---[ end trace 31349e68c947a2bf ]--- [ 24.992995] Kernel panic - not syncing: Fatal exception [ 24.998363] Dumping ftrace buffer: [ 25.001876] (ftrace buffer empty) [ 25.005553] Kernel Offset: disabled [ 25.009150] Rebooting in 86400 seconds..