[....] Starting enhanced syslogd: rsyslogd[ 12.713417] audit: type=1400 audit(1515546685.675:5): avc: denied { syslog } for pid=3343 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: [ 18.731415] audit: type=1400 audit(1515546691.693:6): avc: denied { map } for pid=3482 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 '10.128.15.206' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 24.937427] audit: type=1400 audit(1515546697.899:7): avc: denied { map } for pid=3496 comm="syzkaller539310" path="/root/syzkaller539310989" 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 [ 24.963370] audit: type=1400 audit(1515546697.910:8): avc: denied { map } for pid=3496 comm="syzkaller539310" path="/dev/usbmon0" dev="devtmpfs" ino=8877 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 [ 24.993124] page:ffffea00070178c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 25.001383] flags: 0x2fffc0000000000() [ 25.005311] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 25.013286] raw: ffffea000701c1e0 ffffea00070178a0 0000000000000000 0000000000000000 [ 25.021210] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 25.028334] ------------[ cut here ]------------ [ 25.033068] kernel BUG at ./include/linux/mm.h:844! [ 25.038103] invalid opcode: 0000 [#1] SMP KASAN [ 25.042752] Dumping ftrace buffer: [ 25.046261] (ftrace buffer empty) [ 25.049940] Modules linked in: [ 25.053102] CPU: 1 PID: 3497 Comm: syzkaller539310 Not tainted 4.15.0-rc7+ #165 [ 25.060516] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.069847] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.074829] RSP: 0018:ffff8801c075f388 EFLAGS: 00010203 [ 25.080161] RAX: 0000000000000000 RBX: 1ffff100380ebe73 RCX: 0000000000000000 [ 25.087405] RDX: 0000000000000000 RSI: 1ffff100380ebdbd RDI: ffffed00380ebe60 [ 25.094643] RBP: ffff8801c075f460 R08: 1ffff100380ebd7f R09: 0000000000000000 [ 25.101879] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100380ebe77 [ 25.109115] R13: dffffc0000000000 R14: ffff8801c075f6b8 R15: ffffea00070178c0 [ 25.116353] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f3eb40 [ 25.124543] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.130409] CR2: 0000000020000ffc CR3: 00000001c11ea004 CR4: 00000000001606e0 [ 25.137650] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.144886] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.152136] Call Trace: [ 25.154700] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.158822] ? find_held_lock+0x35/0x1d0 [ 25.162871] __do_fault+0xeb/0x30f [ 25.166381] ? pte_offset_kernel+0xc7/0xc7 [ 25.170586] ? rb_insert_color_cached+0x1660/0x1660 [ 25.175578] ? rcutorture_record_progress+0x10/0x10 [ 25.180560] ? check_noncircular+0x20/0x20 [ 25.184777] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.189160] ? __pmd_alloc+0x4e0/0x4e0 [ 25.193019] ? __save_stack_trace+0x7e/0xd0 [ 25.197317] ? find_held_lock+0x35/0x1d0 [ 25.201362] ? handle_mm_fault+0x248/0x8d0 [ 25.205582] ? lock_downgrade+0x980/0x980 [ 25.209715] handle_mm_fault+0x334/0x8d0 [ 25.213743] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.218292] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.224145] ? find_vma+0x30/0x150 [ 25.227662] __get_user_pages+0x50c/0x15f0 [ 25.231869] ? follow_page_mask+0x17f0/0x17f0 [ 25.236336] ? lock_acquire+0x1d5/0x580 [ 25.240285] ? lock_acquire+0x1d5/0x580 [ 25.244236] ? __mm_populate+0x2c7/0x450 [ 25.248273] ? lock_release+0xa40/0xa40 [ 25.252226] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.258098] ? rcu_note_context_switch+0x710/0x710 [ 25.262998] populate_vma_page_range+0x20e/0x2f0 [ 25.267728] ? get_user_pages+0xc0/0xc0 [ 25.271673] ? vmacache_find+0x5f/0x280 [ 25.275626] ? vmacache_update+0xfe/0x130 [ 25.279747] ? find_vma+0x30/0x150 [ 25.283257] __mm_populate+0x23a/0x450 [ 25.287128] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.292032] ? down_read_killable+0x180/0x180 [ 25.296498] ? security_mmap_file+0x143/0x180 [ 25.300972] vm_mmap_pgoff+0x241/0x280 [ 25.304840] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.309653] ? handle_mm_fault+0x410/0x8d0 [ 25.313860] ? memset+0x31/0x40 [ 25.317114] SyS_mmap_pgoff+0x462/0x5f0 [ 25.321064] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.325789] ? compat_SyS_ioctl+0x77/0x2a30 [ 25.330088] ? do_fast_syscall_32+0x156/0xf9d [ 25.334552] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.339276] do_fast_syscall_32+0x3ee/0xf9d [ 25.343569] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.348118] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.353627] ? syscall_return_slowpath+0x2ad/0x550 [ 25.358525] ? sysret32_from_system_call+0x5/0x3b [ 25.363335] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.368153] entry_SYSENTER_compat+0x54/0x63 [ 25.372526] RIP: 0023:0xf7f42c79 [ 25.375855] RSP: 002b:00000000f7f3e11c EFLAGS: 00000296 ORIG_RAX: 00000000000000c0 [ 25.383528] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 25.390768] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000a [ 25.398009] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.405257] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.412495] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.419739] 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 cb 9c 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 dc 89 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 a7 9c 94 fd [ 25.438807] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c075f388 [ 25.445324] ---[ end trace da0dd690fbe2eb7c ]--- [ 25.450089] Kernel panic - not syncing: Fatal exception [ 25.455888] Dumping ftrace buffer: [ 25.459405] (ftrace buffer empty) [ 25.463090] Kernel Offset: disabled [ 25.466684] Rebooting in 86400 seconds..