[....] Starting enhanced syslogd: rsyslogd[ 13.211705] audit: type=1400 audit(1515337493.262:5): avc: denied { syslog } for pid=3344 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: [ 17.628667] audit: type=1400 audit(1515337497.679:6): avc: denied { map } for pid=3484 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 23.886568] audit: type=1400 audit(1515337503.937:7): avc: denied { map } for pid=3498 comm="syzkaller097126" path="/root/syzkaller097126283" 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 [ 23.913518] audit: type=1400 audit(1515337503.942:8): avc: denied { map } for pid=3498 comm="syzkaller097126" path="/dev/usbmon0" dev="devtmpfs" ino=8849 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 [ 23.951427] page:ffffea0006fab700 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.959774] flags: 0x2fffc0000000000() [ 23.963713] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffff80 [ 23.971666] raw: ffff88021fffab40 ffff88021fffab40 0000000000000000 0000000000000000 [ 23.979606] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.986735] ------------[ cut here ]------------ [ 23.991469] kernel BUG at ./include/linux/mm.h:844! [ 23.996526] invalid opcode: 0000 [#1] SMP KASAN [ 24.001190] Dumping ftrace buffer: [ 24.004713] (ftrace buffer empty) [ 24.008403] Modules linked in: [ 24.011574] CPU: 1 PID: 3499 Comm: syzkaller097126 Not tainted 4.15.0-rc6+ #250 [ 24.018986] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.028324] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 24.033308] RSP: 0018:ffff8801bedcf510 EFLAGS: 00010203 [ 24.038639] RAX: 0000000000000000 RBX: 1ffff10037db9ea4 RCX: 0000000000000000 [ 24.045878] RDX: 0000000000000000 RSI: 1ffff10037db9dee RDI: ffffed0037db9e90 [ 24.053125] RBP: ffff8801bedcf5e8 R08: 1ffff10037db9db0 R09: 0000000000000000 [ 24.060549] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037db9ea8 [ 24.067804] R13: dffffc0000000000 R14: ffff8801bedcf840 R15: ffffea0006fab700 [ 24.075048] FS: 00007fa8f031b700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 24.083241] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.089094] CR2: 00000000208be000 CR3: 00000001be910006 CR4: 00000000001606e0 [ 24.096336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.103576] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.110814] Call Trace: [ 24.113380] ? mon_alloc_buff+0x1a0/0x1a0 [ 24.117500] ? find_held_lock+0x35/0x1d0 [ 24.121548] __do_fault+0xeb/0x30f [ 24.125061] ? vma_gap_callbacks_rotate+0x62/0x80 [ 24.129871] ? pte_offset_kernel+0xc7/0xc7 [ 24.134074] ? print_irqtrace_events+0x270/0x270 [ 24.138801] ? rb_insert_color_cached+0x1660/0x1660 [ 24.143786] ? vma_compute_subtree_gap+0x200/0x200 [ 24.148692] ? check_noncircular+0x20/0x20 [ 24.152898] __handle_mm_fault+0x1d8f/0x3ce0 [ 24.157277] ? __pmd_alloc+0x4e0/0x4e0 [ 24.161134] ? __save_stack_trace+0x7e/0xd0 [ 24.165428] ? find_held_lock+0x35/0x1d0 [ 24.169460] ? handle_mm_fault+0x248/0x8d0 [ 24.173680] ? lock_downgrade+0x980/0x980 [ 24.177809] handle_mm_fault+0x334/0x8d0 [ 24.181840] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.186394] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.192246] ? find_vma+0x30/0x150 [ 24.195759] __get_user_pages+0x50c/0x15f0 [ 24.199969] ? follow_page_mask+0x17f0/0x17f0 [ 24.204437] ? lock_acquire+0x1d5/0x580 [ 24.208381] ? lock_acquire+0x1d5/0x580 [ 24.212335] ? __mm_populate+0x2c7/0x450 [ 24.216379] ? lock_release+0xa40/0xa40 [ 24.220325] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.226181] ? rcu_note_context_switch+0x710/0x710 [ 24.231089] populate_vma_page_range+0x20e/0x2f0 [ 24.235833] ? get_user_pages+0xc0/0xc0 [ 24.239779] ? vmacache_find+0x5f/0x280 [ 24.243722] ? vmacache_update+0xfe/0x130 [ 24.247840] ? find_vma+0x30/0x150 [ 24.251357] __mm_populate+0x23a/0x450 [ 24.255217] ? populate_vma_page_range+0x2f0/0x2f0 [ 24.260221] ? down_read_killable+0x180/0x180 [ 24.264691] ? security_mmap_file+0x143/0x180 [ 24.269160] vm_mmap_pgoff+0x241/0x280 [ 24.273026] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.277839] ? putname+0xee/0x130 [ 24.281260] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.286244] ? kmem_cache_free+0x267/0x2a0 [ 24.290451] SyS_mmap_pgoff+0x462/0x5f0 [ 24.294395] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.299119] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.304107] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.308834] SyS_mmap+0x16/0x20 [ 24.312084] entry_SYSCALL_64_fastpath+0x23/0x9a [ 24.316807] RIP: 0033:0x449229 [ 24.319965] RSP: 002b:00007fa8f031ad98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 24.327642] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449229 [ 24.334882] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 24.342121] RBP: 0000000000000000 R08: 000000000000000b R09: 0000000000000000 [ 24.349361] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 24.356610] R13: 6273752f7665642f R14: 00007fa8f031b9c0 R15: 0000000000000005 [ 24.363869] 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 fb a3 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 8c 8c bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 d7 a3 94 fd [ 24.382947] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bedcf510 [ 24.389475] ---[ end trace 0d0766b9fdbeeb7b ]--- [ 24.394250] Kernel panic - not syncing: Fatal exception [ 24.400028] Dumping ftrace buffer: [ 24.403551] (ftrace buffer empty) [ 24.407243] Kernel Offset: disabled [ 24.410840] Rebooting in 86400 seconds..