[....] Starting enhanced syslogd: rsyslogd[ 10.200789] audit: type=1400 audit(1514442585.540:5): avc: denied { syslog } for pid=2988 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 15.578939] audit: type=1400 audit(1514442590.918:6): avc: denied { map } for pid=3128 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 '10.128.0.39' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 21.742246] audit: type=1400 audit(1514442597.081:7): avc: denied { map } for pid=3142 comm="syzkaller855594" path="/root/syzkaller855594825" 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 [ 21.768688] audit: type=1400 audit(1514442597.082:8): avc: denied { map } for pid=3142 comm="syzkaller855594" path="/dev/usbmon0" dev="devtmpfs" ino=8945 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 [ 21.826221] page:ffffea0007354800 count:0 mapcount:0 mapping: (null) index:0x0 [ 21.834464] flags: 0x2fffc0000000000() [ 21.838378] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 21.846282] raw: ffffea00073ea020 ffffea00072510e0 0000000000000000 0000000000000000 [ 21.854188] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 21.861285] ------------[ cut here ]------------ [ 21.866007] kernel BUG at ./include/linux/mm.h:844! [ 21.871130] invalid opcode: 0000 [#1] SMP KASAN [ 21.875769] Dumping ftrace buffer: [ 21.879272] (ftrace buffer empty) [ 21.882951] Modules linked in: [ 21.886111] CPU: 0 PID: 3143 Comm: syzkaller855594 Not tainted 4.15.0-rc4-mm1+ #49 [ 21.893783] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.903113] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 21.908091] RSP: 0018:ffff8801c8827510 EFLAGS: 00010203 [ 21.913419] RAX: 0000000000000000 RBX: 1ffff10039104ea4 RCX: 0000000000000000 [ 21.920657] RDX: 0000000000000000 RSI: 1ffff10039104dee RDI: ffffed0039104e90 [ 21.927893] RBP: ffff8801c88275e8 R08: 1ffff10039104db0 R09: 0000000000000000 [ 21.935130] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039104ea8 [ 21.942367] R13: dffffc0000000000 R14: ffff8801c8827840 R15: ffffea0007354800 [ 21.949607] FS: 00007f82db249700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 21.957801] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.963653] CR2: 00000000208be000 CR3: 00000001ca6c6005 CR4: 00000000001606f0 [ 21.970893] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.978132] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.985368] Call Trace: [ 21.987926] ? mon_alloc_buff+0x1a0/0x1a0 [ 21.992038] ? find_held_lock+0x35/0x1d0 [ 21.996074] __do_fault+0xeb/0x30f [ 21.999583] ? vma_gap_callbacks_rotate+0x62/0x80 [ 22.004392] ? pte_offset_kernel+0xc7/0xc7 [ 22.008604] ? print_irqtrace_events+0x270/0x270 [ 22.013328] ? rb_insert_color_cached+0x1660/0x1660 [ 22.018311] ? vma_compute_subtree_gap+0x200/0x200 [ 22.023206] ? rb_insert_color_cached+0x1660/0x1660 [ 22.028194] ? check_noncircular+0x20/0x20 [ 22.032398] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.036775] ? __pmd_alloc+0x4e0/0x4e0 [ 22.040630] ? find_held_lock+0x35/0x1d0 [ 22.044660] ? handle_mm_fault+0x2a0/0x930 [ 22.048877] ? lock_downgrade+0x980/0x980 [ 22.053002] handle_mm_fault+0x38f/0x930 [ 22.057056] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.061603] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.067455] ? find_vma+0x30/0x150 [ 22.070973] __get_user_pages+0x50c/0x15f0 [ 22.075190] ? follow_page_mask+0x17f0/0x17f0 [ 22.079649] ? vma_link+0xe9/0x170 [ 22.083155] ? lock_acquire+0x1d5/0x580 [ 22.087093] ? lock_acquire+0x1d5/0x580 [ 22.091033] ? __mm_populate+0x2c7/0x450 [ 22.095061] ? lock_release+0xa40/0xa40 [ 22.099000] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.104849] ? rcu_note_context_switch+0x710/0x710 [ 22.109744] populate_vma_page_range+0x20e/0x2f0 [ 22.114466] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 22.119358] ? vmacache_find+0x5f/0x280 [ 22.123744] ? vmacache_update+0xfe/0x130 [ 22.127868] ? find_vma+0x30/0x150 [ 22.131373] __mm_populate+0x23a/0x450 [ 22.135235] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.140130] ? down_read_killable+0x180/0x180 [ 22.144589] ? security_mmap_file+0x143/0x180 [ 22.149053] vm_mmap_pgoff+0x241/0x280 [ 22.152909] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.157717] ? putname+0xee/0x130 [ 22.161137] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.166117] ? kmem_cache_free+0x267/0x2a0 [ 22.170323] SyS_mmap_pgoff+0x462/0x5f0 [ 22.174264] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.178984] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.183966] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.188688] SyS_mmap+0x16/0x20 [ 22.191932] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.196652] RIP: 0033:0x449269 [ 22.199805] RSP: 002b:00007f82db248d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 22.207476] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449269 [ 22.214711] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.221953] RBP: 0000000000000000 R08: 000000000000000f R09: 0000000000000000 [ 22.229196] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 22.236431] R13: 6273752f7665642f R14: 00007f82db2499c0 R15: 0000000000000005 [ 22.243675] 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 [ 22.262742] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8827510 [ 22.269263] ---[ end trace 9f48127a0df651c5 ]--- [ 22.274058] Kernel panic - not syncing: Fatal exception [ 22.279449] Dumping ftrace buffer: [ 22.282960] (ftrace buffer empty) [ 22.286641] Kernel Offset: disabled [ 22.290235] Rebooting in 86400 seconds..