[....] Starting enhanced syslogd: rsyslogd[ 10.265208] audit: type=1400 audit(1514261275.401:5): avc: denied { syslog } for pid=2984 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: [ 12.678487] audit: type=1400 audit(1514261277.814:6): avc: denied { map } for pid=3123 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-mmots-kasan-gce-2,10.128.0.39' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 18.917617] audit: type=1400 audit(1514261284.053:7): avc: denied { map } for pid=3137 comm="syzkaller658040" path="/root/syzkaller658040012" 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 executing program executing program executing program [ 18.943898] audit: type=1400 audit(1514261284.064:8): avc: denied { map } for pid=3137 comm="syzkaller658040" path="/dev/usbmon0" dev="devtmpfs" ino=1059 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 19.103381] page:ffffea0007337d00 count:0 mapcount:0 mapping: (null) index:0x0 [ 19.111638] flags: 0x2fffc0000000000() [ 19.115610] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 19.123515] raw: ffffea0007223f60 ffffea00074bc3a0 0000000000000000 0000000000000000 [ 19.131426] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 19.138531] ------------[ cut here ]------------ [ 19.143268] kernel BUG at ./include/linux/mm.h:844! [ 19.148311] invalid opcode: 0000 [#1] SMP KASAN [ 19.152961] Dumping ftrace buffer: [ 19.156477] (ftrace buffer empty) [ 19.160156] Modules linked in: [ 19.163318] CPU: 1 PID: 3138 Comm: syzkaller658040 Not tainted 4.15.0-rc4-mm1+ #49 [ 19.170988] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.180317] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 19.185304] RSP: 0018:ffff8801c934f510 EFLAGS: 00010203 [ 19.190633] RAX: 0000000000000000 RBX: 1ffff10039269ea4 RCX: 0000000000000000 [ 19.197878] RDX: 0000000000000000 RSI: 1ffff10039269dee RDI: ffffed0039269e90 [ 19.205130] RBP: ffff8801c934f5e8 R08: 1ffff10039269db0 R09: 0000000000000000 [ 19.212366] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039269ea8 [ 19.220179] R13: dffffc0000000000 R14: ffff8801c934f840 R15: ffffea0007337d00 [ 19.227431] FS: 00007fc46a1be700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 19.236145] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 19.241993] CR2: 00000000205e4ff3 CR3: 00000001ca715001 CR4: 00000000001606e0 [ 19.249235] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.256470] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.263706] Call Trace: [ 19.266274] ? mon_alloc_buff+0x1a0/0x1a0 [ 19.270406] ? finish_fault+0x1b4/0x2a0 [ 19.274372] ? lock_downgrade+0x980/0x980 [ 19.278929] ? do_swap_page+0x2a10/0x2a10 [ 19.283047] __do_fault+0xeb/0x30f [ 19.286556] ? pte_offset_kernel+0xc7/0xc7 [ 19.290757] ? vma_compute_subtree_gap+0x200/0x200 [ 19.295664] ? check_noncircular+0x20/0x20 [ 19.299868] ? _raw_spin_unlock+0x22/0x30 [ 19.303983] __handle_mm_fault+0x1d8f/0x3ce0 [ 19.308371] ? __pmd_alloc+0x4e0/0x4e0 [ 19.312228] ? find_held_lock+0x35/0x1d0 [ 19.316259] ? handle_mm_fault+0x2a0/0x930 [ 19.320462] ? lock_downgrade+0x980/0x980 [ 19.324592] handle_mm_fault+0x38f/0x930 [ 19.328623] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 19.333172] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.339024] ? find_vma+0x30/0x150 [ 19.342534] __get_user_pages+0x50c/0x15f0 [ 19.346749] ? follow_page_mask+0x17f0/0x17f0 [ 19.351216] ? vma_link+0xe9/0x170 [ 19.354724] ? lock_acquire+0x1d5/0x580 [ 19.358674] ? lock_acquire+0x1d5/0x580 [ 19.362623] ? __mm_populate+0x2c7/0x450 [ 19.366652] ? lock_release+0xa40/0xa40 [ 19.370592] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.376452] ? rcu_note_context_switch+0x710/0x710 [ 19.381359] populate_vma_page_range+0x20e/0x2f0 [ 19.386099] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 19.391008] ? vmacache_find+0x5f/0x280 [ 19.394954] ? vmacache_update+0xfe/0x130 [ 19.399072] ? find_vma+0x30/0x150 [ 19.402580] __mm_populate+0x23a/0x450 [ 19.406437] ? populate_vma_page_range+0x2f0/0x2f0 [ 19.411334] ? down_read_killable+0x180/0x180 [ 19.415807] ? security_mmap_file+0x143/0x180 [ 19.420274] vm_mmap_pgoff+0x241/0x280 [ 19.424133] ? vma_is_stack_for_current+0xa0/0xa0 [ 19.428957] ? ___sys_recvmsg+0x640/0x640 [ 19.433072] ? rcu_read_lock_sched_held+0x108/0x120 [ 19.438054] ? kmem_cache_free+0x267/0x2a0 [ 19.442260] SyS_mmap_pgoff+0x462/0x5f0 [ 19.446206] ? find_mergeable_anon_vma+0xd0/0xd0 [ 19.450931] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 19.455918] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 19.460658] SyS_mmap+0x16/0x20 [ 19.463908] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 19.468630] RIP: 0033:0x449529 [ 19.471787] RSP: 002b:00007fc46a1bdd98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 19.479462] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449529 [ 19.486699] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 19.493944] RBP: 00000000006dac20 R08: 000000000000005f R09: 0000000000000000 [ 19.501183] R10: 0000000000008011 R11: 0000000000000212 R12: 977e79a25a843e8f [ 19.508431] R13: 6273752f7665642f R14: 74656e2f7665642f R15: 000000000000000b [ 19.515687] 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 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd [ 19.534760] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c934f510 [ 19.541315] ---[ end trace 9d8f5761f192ca13 ]--- [ 19.546256] Kernel panic - not syncing: Fatal exception [ 19.552074] Dumping ftrace buffer: [ 19.555598] (ftrace buffer empty) [ 19.559288] Kernel Offset: disabled [ 19.562882] Rebooting in 86400 seconds..