[....] Starting enhanced syslogd: rsyslogd[ 12.162047] audit: type=1400 audit(1514847722.579:5): avc: denied { syslog } for pid=3321 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: [ 17.977657] audit: type=1400 audit(1514847728.395:6): avc: denied { map } for pid=3461 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 '10.128.15.224' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 24.179453] audit: type=1400 audit(1514847734.597:7): avc: denied { map } for pid=3475 comm="syzkaller196964" path="/root/syzkaller196964062" 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 [ 24.205378] audit: type=1400 audit(1514847734.604:8): avc: denied { map } for pid=3475 comm="syzkaller196964" path="/dev/usbmon0" dev="devtmpfs" ino=1189 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 [ 24.240740] page:00000000d6fe615e count:0 mapcount:0 mapping: (null) index:0x0 [ 24.248962] flags: 0x2fffc0000000000() [ 24.252880] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.260781] raw: ffffea000703fbe0 ffffea000704e3e0 0000000000000000 0000000000000000 [ 24.268667] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.275779] ------------[ cut here ]------------ [ 24.280499] kernel BUG at ./include/linux/mm.h:844! [ 24.285513] invalid opcode: 0000 [#1] SMP KASAN [ 24.290152] Dumping ftrace buffer: [ 24.293655] (ftrace buffer empty) [ 24.297331] Modules linked in: [ 24.300492] CPU: 1 PID: 3476 Comm: syzkaller196964 Not tainted 4.15.0-rc6+ #155 [ 24.308424] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.319313] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 24.324291] RSP: 0018:ffff8801c04df388 EFLAGS: 00010203 [ 24.329621] RAX: 0000000000000000 RBX: 1ffff1003809be73 RCX: 0000000000000000 [ 24.336868] RDX: 0000000000000000 RSI: 1ffff1003809bdbd RDI: ffffed003809be60 [ 24.344114] RBP: ffff8801c04df460 R08: 1ffff1003809bd7f R09: 0000000000000000 [ 24.351351] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003809be77 [ 24.358588] R13: dffffc0000000000 R14: ffff8801c04df6b8 R15: ffffea000704e380 [ 24.365832] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f05b40 [ 24.374024] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 24.379875] CR2: 00000000208be000 CR3: 00000001c0f0b004 CR4: 00000000001606e0 [ 24.387117] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.394353] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.401588] Call Trace: [ 24.404149] ? mon_alloc_buff+0x1a0/0x1a0 [ 24.408266] ? find_held_lock+0x35/0x1d0 [ 24.412309] __do_fault+0xeb/0x30f [ 24.415818] ? pte_offset_kernel+0xc7/0xc7 [ 24.420020] ? rb_insert_color_cached+0x1660/0x1660 [ 24.425018] ? rcutorture_record_progress+0x10/0x10 [ 24.430014] ? check_noncircular+0x20/0x20 [ 24.434217] __handle_mm_fault+0x1d8f/0x3ce0 [ 24.438595] ? __pmd_alloc+0x4e0/0x4e0 [ 24.442448] ? __save_stack_trace+0x7e/0xd0 [ 24.446739] ? find_held_lock+0x35/0x1d0 [ 24.450771] ? handle_mm_fault+0x248/0x8d0 [ 24.454973] ? lock_downgrade+0x980/0x980 [ 24.459101] handle_mm_fault+0x334/0x8d0 [ 24.463134] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.467683] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.473532] ? find_vma+0x30/0x150 [ 24.477054] __get_user_pages+0x50c/0x15f0 [ 24.481270] ? follow_page_mask+0x17f0/0x17f0 [ 24.485736] ? lock_acquire+0x1d5/0x580 [ 24.489677] ? lock_acquire+0x1d5/0x580 [ 24.493618] ? __mm_populate+0x2c7/0x450 [ 24.497647] ? lock_release+0xa40/0xa40 [ 24.501586] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.507441] ? rcu_note_context_switch+0x710/0x710 [ 24.512341] populate_vma_page_range+0x20e/0x2f0 [ 24.517076] ? get_user_pages+0xc0/0xc0 [ 24.521031] ? vmacache_find+0x5f/0x280 [ 24.524986] ? vmacache_update+0xfe/0x130 [ 24.529114] ? find_vma+0x30/0x150 [ 24.532621] __mm_populate+0x23a/0x450 [ 24.536494] ? populate_vma_page_range+0x2f0/0x2f0 [ 24.541389] ? down_read_killable+0x180/0x180 [ 24.545852] ? security_mmap_file+0x143/0x180 [ 24.550316] vm_mmap_pgoff+0x241/0x280 [ 24.554171] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.558979] ? putname+0xee/0x130 [ 24.562401] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.567386] ? kmem_cache_free+0x267/0x2a0 [ 24.571600] SyS_mmap_pgoff+0x462/0x5f0 [ 24.575547] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.580274] ? do_fast_syscall_32+0x156/0xf9d [ 24.584738] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.589460] do_fast_syscall_32+0x3ee/0xf9d [ 24.593751] ? do_int80_syscall_32+0x9d0/0x9d0 [ 24.598302] ? syscall_return_slowpath+0x2ad/0x550 [ 24.603208] ? prepare_exit_to_usermode+0x340/0x340 [ 24.608192] ? sysret32_from_system_call+0x5/0x3b [ 24.613009] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.617820] entry_SYSENTER_compat+0x54/0x63 [ 24.622193] RIP: 0023:0xf7f09c79 [ 24.625522] RSP: 002b:00000000f7f051ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 24.633194] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 24.640435] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000e [ 24.647672] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 24.654935] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 24.662183] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 24.669433] 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 2b b0 94 fd 48 c7 c6 20 b1 12 86 4c 89 ff e8 bc 98 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 07 b0 94 fd [ 24.688535] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c04df388 [ 24.695053] ---[ end trace 145c7f1d41b13a9f ]--- [ 24.699787] Kernel panic - not syncing: Fatal exception [ 24.705155] Dumping ftrace buffer: [ 24.708663] (ftrace buffer empty) [ 24.712351] Kernel Offset: disabled [ 24.715945] Rebooting in 86400 seconds..