[....] Starting enhanced syslogd: rsyslogd[ 12.343335] audit: type=1400 audit(1515558425.933:5): avc: denied { syslog } for pid=3347 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: [ 19.408398] audit: type=1400 audit(1515558432.998:6): avc: denied { map } for pid=3487 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 '10.128.15.219' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 25.571643] audit: type=1400 audit(1515558439.161:7): avc: denied { map } for pid=3501 comm="syzkaller960731" path="/root/syzkaller960731965" 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 [ 25.597727] audit: type=1400 audit(1515558439.169:8): avc: denied { map } for pid=3501 comm="syzkaller960731" path="/dev/usbmon0" dev="devtmpfs" ino=1080 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 [ 25.662396] page:ffffea0007019dc0 count:0 mapcount:0 mapping: (null) index:0x0 [ 25.670666] flags: 0x2fffc0000000000() [ 25.674650] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 25.682553] raw: ffffea00070165e0 ffffea0007001860 0000000000000000 0000000000000000 [ 25.690437] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 25.697542] ------------[ cut here ]------------ [ 25.702270] kernel BUG at ./include/linux/mm.h:844! [ 25.707311] invalid opcode: 0000 [#1] SMP KASAN [ 25.711953] Dumping ftrace buffer: [ 25.715459] (ftrace buffer empty) [ 25.719136] Modules linked in: [ 25.722299] CPU: 0 PID: 3502 Comm: syzkaller960731 Not tainted 4.15.0-rc6-mm1+ #52 [ 25.729978] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.739310] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.744295] RSP: 0018:ffff8801c0587510 EFLAGS: 00010203 [ 25.749626] RAX: 0000000000000000 RBX: 1ffff100380b0ea4 RCX: 0000000000000000 [ 25.756864] RDX: 0000000000000000 RSI: 1ffff10038015db3 RDI: ffffed00380b0e90 [ 25.764103] RBP: ffff8801c05875e8 R08: 1ffff100380b0db0 R09: 0000000000000000 [ 25.771339] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100380b0ea8 [ 25.778575] R13: dffffc0000000000 R14: ffff8801c0587840 R15: ffffea0007019dc0 [ 25.785814] FS: 00007fd7ee8c9700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.794010] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.799861] CR2: 00000000208be000 CR3: 00000001c050a004 CR4: 00000000001606f0 [ 25.807100] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.814335] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.821580] Call Trace: [ 25.824139] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.828263] ? find_held_lock+0x35/0x1d0 [ 25.832301] __do_fault+0xeb/0x30f [ 25.835811] ? vma_gap_callbacks_rotate+0x62/0x80 [ 25.840620] ? pte_offset_kernel+0xc7/0xc7 [ 25.844820] ? print_irqtrace_events+0x270/0x270 [ 25.849541] ? rb_insert_color_cached+0x1660/0x1660 [ 25.854525] ? vma_compute_subtree_gap+0x200/0x200 [ 25.859433] ? rb_insert_color_cached+0x1660/0x1660 [ 25.864415] ? check_noncircular+0x20/0x20 [ 25.868629] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.873017] ? __pmd_alloc+0x4e0/0x4e0 [ 25.876882] ? find_held_lock+0x35/0x1d0 [ 25.880915] ? handle_mm_fault+0x2a0/0x930 [ 25.885117] ? lock_downgrade+0x980/0x980 [ 25.889243] handle_mm_fault+0x38f/0x930 [ 25.893272] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.897821] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.903670] ? find_vma+0x30/0x150 [ 25.907182] __get_user_pages+0x50c/0x15f0 [ 25.911388] ? follow_page_mask+0x17f0/0x17f0 [ 25.915851] ? vma_link+0xe9/0x170 [ 25.919358] ? lock_acquire+0x1d5/0x580 [ 25.923298] ? lock_acquire+0x1d5/0x580 [ 25.927238] ? __mm_populate+0x2c7/0x450 [ 25.931267] ? lock_release+0xa40/0xa40 [ 25.935208] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.941064] ? rcu_note_context_switch+0x710/0x710 [ 25.945964] populate_vma_page_range+0x20e/0x2f0 [ 25.950698] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 25.955591] ? vmacache_find+0x5f/0x280 [ 25.959531] ? vmacache_update+0xfe/0x130 [ 25.963647] ? find_vma+0x30/0x150 [ 25.967154] __mm_populate+0x23a/0x450 [ 25.971012] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.975908] ? down_read_killable+0x180/0x180 [ 25.980381] ? security_mmap_file+0x143/0x180 [ 25.984847] vm_mmap_pgoff+0x241/0x280 [ 25.988704] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.993514] ? putname+0xee/0x130 [ 25.996935] ? rcu_read_lock_sched_held+0x108/0x120 [ 26.001929] ? kmem_cache_free+0x273/0x2b0 [ 26.006136] SyS_mmap_pgoff+0x462/0x5f0 [ 26.010097] ? find_mergeable_anon_vma+0xd0/0xd0 [ 26.014824] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.019810] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.024535] SyS_mmap+0x16/0x20 [ 26.027783] entry_SYSCALL_64_fastpath+0x23/0x9a [ 26.032503] RIP: 0033:0x449249 [ 26.035660] RSP: 002b:00007fd7ee8c8d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 26.043333] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449249 [ 26.050569] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 26.057807] RBP: 0000000000000000 R08: 0000000000000010 R09: 0000000000000000 [ 26.065044] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 26.072281] R13: 6273752f7665642f R14: 00007fd7ee8c99c0 R15: 0000000000000005 [ 26.079527] 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 3b 8b 90 fd 48 c7 c6 a0 0e 13 86 4c 89 ff e8 0c 74 ba fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 17 8b 90 fd [ 26.098595] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c0587510 [ 26.105133] ---[ end trace 1770488fb256485d ]--- [ 26.109946] Kernel panic - not syncing: Fatal exception [ 26.115734] Dumping ftrace buffer: [ 26.119252] (ftrace buffer empty) [ 26.122945] Kernel Offset: disabled [ 26.126541] Rebooting in 86400 seconds..