[....] Starting enhanced syslogd: rsyslogd[ 11.411964] audit: type=1400 audit(1514142995.121:5): avc: denied { syslog } for pid=2999 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: [ 18.476900] audit: type=1400 audit(1514143002.186:6): avc: denied { map } for pid=3138 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 'ci-upstream-kasan-gce-4,10.128.15.224' (ECDSA) to the list of known hosts. executing program executing program executing program [ 27.223986] audit: type=1400 audit(1514143010.933:7): avc: denied { map } for pid=3153 comm="syzkaller216357" path="/root/syzkaller216357766" 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 [ 27.250061] audit: type=1400 audit(1514143010.933:8): avc: denied { map } for pid=3153 comm="syzkaller216357" 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 [ 27.280455] page:000000007f2cc12d count:0 mapcount:0 mapping: (null) index:0x0 [ 27.288776] flags: 0x2fffc0000000000() [ 27.292688] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 27.300568] raw: ffffea0007225da0 ffffea0007273ce0 0000000000000000 0000000000000000 [ 27.308450] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 27.315544] ------------[ cut here ]------------ [ 27.320279] kernel BUG at ./include/linux/mm.h:844! [ 27.325295] invalid opcode: 0000 [#1] SMP KASAN [ 27.329957] Dumping ftrace buffer: [ 27.333464] (ftrace buffer empty) [ 27.337140] Modules linked in: [ 27.340301] CPU: 0 PID: 3154 Comm: syzkaller216357 Not tainted 4.15.0-rc5+ #237 [ 27.347711] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.357043] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 27.362025] RSP: 0018:ffff8801c88bf510 EFLAGS: 00010203 [ 27.367365] RAX: 0000000000000000 RBX: 1ffff10039117ea4 RCX: 0000000000000000 [ 27.374602] RDX: 0000000000000000 RSI: 1ffff10039117dee RDI: ffffed0039117e90 [ 27.381837] RBP: ffff8801c88bf5e8 R08: 1ffff10039117db0 R09: 0000000000000000 [ 27.389071] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039117ea8 [ 27.396306] R13: dffffc0000000000 R14: ffff8801c88bf840 R15: ffffea0007282fc0 [ 27.403543] FS: 00007f1b37c89700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 27.411742] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.417591] CR2: 0000000020d15ff8 CR3: 00000001c912e006 CR4: 00000000001606f0 [ 27.424835] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.432073] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.439310] Call Trace: [ 27.441870] ? mon_alloc_buff+0x1a0/0x1a0 [ 27.445986] ? finish_fault+0x1b4/0x2a0 [ 27.449928] ? lock_downgrade+0x980/0x980 [ 27.454043] ? do_swap_page+0x2c50/0x2c50 [ 27.458158] __do_fault+0xeb/0x30f [ 27.461667] ? pte_offset_kernel+0xc7/0xc7 [ 27.465874] ? check_noncircular+0x20/0x20 [ 27.470077] ? _raw_spin_unlock+0x22/0x30 [ 27.474191] __handle_mm_fault+0x1d8f/0x3ce0 [ 27.478567] ? __pmd_alloc+0x4e0/0x4e0 [ 27.482420] ? __save_stack_trace+0x7e/0xd0 [ 27.486712] ? find_held_lock+0x35/0x1d0 [ 27.490743] ? handle_mm_fault+0x248/0x8d0 [ 27.494947] ? lock_downgrade+0x980/0x980 [ 27.499071] handle_mm_fault+0x334/0x8d0 [ 27.503098] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 27.507652] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 27.513500] ? find_vma+0x30/0x150 [ 27.517014] __get_user_pages+0x50c/0x15f0 [ 27.521225] ? follow_page_mask+0x17f0/0x17f0 [ 27.525692] ? lock_acquire+0x1d5/0x580 [ 27.529644] ? lock_acquire+0x1d5/0x580 [ 27.533585] ? __mm_populate+0x2c7/0x450 [ 27.537615] ? lock_release+0xa40/0xa40 [ 27.541561] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 27.547413] ? rcu_note_context_switch+0x710/0x710 [ 27.552312] populate_vma_page_range+0x20e/0x2f0 [ 27.557035] ? get_user_pages+0xc0/0xc0 [ 27.560976] ? vmacache_find+0x5f/0x280 [ 27.564919] ? vmacache_update+0xfe/0x130 [ 27.569038] ? find_vma+0x30/0x150 [ 27.572547] __mm_populate+0x23a/0x450 [ 27.576413] ? populate_vma_page_range+0x2f0/0x2f0 [ 27.581311] ? down_read_killable+0x180/0x180 [ 27.585774] ? security_mmap_file+0x143/0x180 [ 27.590238] vm_mmap_pgoff+0x241/0x280 [ 27.594101] ? vma_is_stack_for_current+0xa0/0xa0 [ 27.598916] ? putname+0xee/0x130 [ 27.602337] ? rcu_read_lock_sched_held+0x108/0x120 [ 27.607319] ? kmem_cache_free+0x267/0x2a0 [ 27.611527] SyS_mmap_pgoff+0x462/0x5f0 [ 27.615468] ? find_mergeable_anon_vma+0xd0/0xd0 [ 27.620189] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.625172] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.629897] SyS_mmap+0x16/0x20 [ 27.633143] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 27.637862] RIP: 0033:0x4497d9 [ 27.641021] RSP: 002b:00007f1b37c88cd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 27.648695] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004497d9 [ 27.655931] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 27.663168] RBP: 00000000006dac20 R08: 0000000000000008 R09: 0000000000000000 [ 27.670402] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 27.677640] R13: 00007ffe4f567f8f R14: 00007f1b37c899c0 R15: 0000000000000009 [ 27.684881] 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 bf a4 fd 48 c7 c6 c0 c0 70 85 4c 89 ff e8 2c a3 cd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 17 bf a4 fd [ 27.703944] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c88bf510 [ 27.710455] ---[ end trace 47993344f7bab0fe ]--- [ 27.715355] Kernel panic - not syncing: Fatal exception [ 27.721078] Dumping ftrace buffer: [ 27.724593] (ftrace buffer empty) [ 27.728270] Kernel Offset: disabled [ 27.731861] Rebooting in 86400 seconds..