[....] Starting enhanced syslogd: rsyslogd[ 12.007855] audit: type=1400 audit(1515562372.973:5): avc: denied { syslog } for pid=3348 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: [ 18.502618] audit: type=1400 audit(1515562379.468:6): avc: denied { map } for pid=3488 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 '10.128.15.248' (ECDSA) to the list of known hosts. executing program executing program executing program [ 36.226639] audit: type=1400 audit(1515562397.192:7): avc: denied { map } for pid=3505 comm="syzkaller319557" path="/root/syzkaller319557721" 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 [ 36.261308] audit: type=1400 audit(1515562397.227:8): avc: denied { map } for pid=3505 comm="syzkaller319557" path="/dev/usbmon0" dev="devtmpfs" ino=8934 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 [ 36.289581] page:ffffea0007016040 count:0 mapcount:0 mapping: (null) index:0x0 [ 36.297825] flags: 0x2fffc0000000000() [ 36.301965] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 36.309905] raw: ffffea000701d6a0 ffffea0006ff5060 0000000000000000 0000000000000000 [ 36.317828] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 36.324963] ------------[ cut here ]------------ [ 36.329695] kernel BUG at ./include/linux/mm.h:844! [ 36.334773] invalid opcode: 0000 [#1] SMP KASAN [ 36.339441] Dumping ftrace buffer: [ 36.342966] (ftrace buffer empty) [ 36.346651] Modules linked in: [ 36.349820] CPU: 0 PID: 3506 Comm: syzkaller319557 Not tainted 4.15.0-rc6-mm1+ #52 [ 36.357507] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.366845] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 36.371840] RSP: 0018:ffff8801bf867510 EFLAGS: 00010203 [ 36.377175] RAX: 0000000000000000 RBX: 1ffff10037f0cea4 RCX: 0000000000000000 [ 36.384419] RDX: 0000000000000000 RSI: 1ffff10037f0cdb8 RDI: ffffed0037f0ce90 [ 36.391660] RBP: ffff8801bf8675e8 R08: 1ffff10037f0cdb0 R09: 0000000000000000 [ 36.398901] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037f0cea8 [ 36.406155] R13: dffffc0000000000 R14: ffff8801bf867840 R15: ffffea0007016040 [ 36.413403] FS: 00007fa9791dd700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 36.421600] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.427460] CR2: 00000000208be000 CR3: 00000001bffa1001 CR4: 00000000001606f0 [ 36.434702] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.441952] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.449212] Call Trace: [ 36.451781] ? mon_alloc_buff+0x1a0/0x1a0 [ 36.455921] ? perf_trace_run_bpf_submit+0x206/0x330 [ 36.461011] ? memset+0x31/0x40 [ 36.464274] __do_fault+0xeb/0x30f [ 36.467797] ? perf_tp_event+0xae0/0xae0 [ 36.471853] ? pte_offset_kernel+0xc7/0xc7 [ 36.476066] ? trace_event_raw_event_lock+0x340/0x340 [ 36.481244] ? check_noncircular+0x20/0x20 [ 36.485469] __handle_mm_fault+0x1d8f/0x3ce0 [ 36.489860] ? __pmd_alloc+0x4e0/0x4e0 [ 36.493735] ? find_held_lock+0x35/0x1d0 [ 36.497784] ? handle_mm_fault+0x2a0/0x930 [ 36.501994] ? lock_downgrade+0x980/0x980 [ 36.506166] handle_mm_fault+0x38f/0x930 [ 36.510206] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 36.514759] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 36.520614] ? find_vma+0x30/0x150 [ 36.524141] __get_user_pages+0x50c/0x15f0 [ 36.528372] ? follow_page_mask+0x17f0/0x17f0 [ 36.532842] ? vma_link+0xe9/0x170 [ 36.536366] ? lock_acquire+0x1d5/0x580 [ 36.540309] ? lock_acquire+0x1d5/0x580 [ 36.544274] ? __mm_populate+0x2c7/0x450 [ 36.548339] ? lock_release+0xa40/0xa40 [ 36.552287] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 36.558151] ? rcu_note_context_switch+0x710/0x710 [ 36.563074] populate_vma_page_range+0x20e/0x2f0 [ 36.567811] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 36.572722] ? vmacache_find+0x5f/0x280 [ 36.576671] ? vmacache_update+0xfe/0x130 [ 36.580797] ? find_vma+0x30/0x150 [ 36.584317] __mm_populate+0x23a/0x450 [ 36.588203] ? populate_vma_page_range+0x2f0/0x2f0 [ 36.593107] ? down_read_killable+0x180/0x180 [ 36.597576] ? security_mmap_file+0x143/0x180 [ 36.602059] vm_mmap_pgoff+0x241/0x280 [ 36.605932] ? vma_is_stack_for_current+0xa0/0xa0 [ 36.610765] ? do_page_fault+0xee/0x720 [ 36.614736] SyS_mmap_pgoff+0x462/0x5f0 [ 36.618693] ? find_mergeable_anon_vma+0xd0/0xd0 [ 36.623424] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.628417] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.633156] SyS_mmap+0x16/0x20 [ 36.636408] entry_SYSCALL_64_fastpath+0x23/0x9a [ 36.641134] RIP: 0033:0x4493a9 [ 36.644294] RSP: 002b:00007fa9791dcd98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 36.651982] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004493a9 [ 36.659224] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 36.666463] RBP: 0000000000000000 R08: 0000000000000016 R09: 0000000000000000 [ 36.673702] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 36.680941] R13: 64696d2f7665642f R14: 6273752f7665642f R15: 0000000000000007 [ 36.688219] 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 [ 36.707447] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bf867510 [ 36.714053] ---[ end trace c929c2262b07a93f ]--- [ 36.719082] Kernel panic - not syncing: Fatal exception [ 36.724826] Dumping ftrace buffer: [ 36.728342] (ftrace buffer empty) [ 36.732025] Kernel Offset: disabled [ 36.735622] Rebooting in 86400 seconds..