[....] Starting enhanced syslogd: rsyslogd[ 10.671259] audit: type=1400 audit(1514235355.931:5): avc: denied { syslog } for pid=2989 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?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: [ 13.831124] audit: type=1400 audit(1514235359.090:6): avc: denied { map } for pid=3128 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-8,10.128.0.44' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 20.066371] audit: type=1400 audit(1514235365.326:7): avc: denied { map } for pid=3142 comm="syzkaller461068" path="/root/syzkaller461068014" 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 [ 20.092585] audit: type=1400 audit(1514235365.336:8): avc: denied { map } for pid=3142 comm="syzkaller461068" path="/dev/usbmon0" dev="devtmpfs" ino=118 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 20.308188] page:00000000088b89e6 count:0 mapcount:0 mapping: (null) index:0x0 [ 20.316445] flags: 0x2fffc0000000000() [ 20.321107] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 20.329095] raw: ffffea0007215ea0 ffffea0007263520 0000000000000000 0000000000000000 [ 20.336990] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 20.344681] ------------[ cut here ]------------ [ 20.349423] kernel BUG at ./include/linux/mm.h:844! [ 20.354461] invalid opcode: 0000 [#1] SMP KASAN [ 20.359104] Dumping ftrace buffer: [ 20.362614] (ftrace buffer empty) [ 20.366289] Modules linked in: [ 20.369449] CPU: 0 PID: 3143 Comm: syzkaller461068 Not tainted 4.15.0-rc5+ #237 [ 20.376856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.386198] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 20.391176] RSP: 0018:ffff8801c8f0f510 EFLAGS: 00010203 [ 20.396502] RAX: 0000000000000000 RBX: 1ffff100391e1ea4 RCX: 0000000000000000 [ 20.403738] RDX: 0000000000000000 RSI: 1ffff100391e1dee RDI: ffffed00391e1e90 [ 20.410972] RBP: ffff8801c8f0f5e8 R08: 1ffff100391e1db0 R09: 0000000000000000 [ 20.418204] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100391e1ea8 [ 20.425436] R13: dffffc0000000000 R14: ffff8801c8f0f840 R15: ffffea0007213f40 [ 20.432671] FS: 00007f630b02d700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 20.440861] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.446706] CR2: 0000000020001f88 CR3: 00000001d7dbd004 CR4: 00000000001606f0 [ 20.453949] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.461181] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.468413] Call Trace: [ 20.470967] ? mon_alloc_buff+0x1a0/0x1a0 [ 20.475088] ? finish_fault+0x1b4/0x2a0 [ 20.479037] ? lock_downgrade+0x980/0x980 [ 20.483159] ? do_swap_page+0x2c50/0x2c50 [ 20.487280] __do_fault+0xeb/0x30f [ 20.490794] ? pte_offset_kernel+0xc7/0xc7 [ 20.495000] ? check_noncircular+0x20/0x20 [ 20.499198] ? _raw_spin_unlock+0x22/0x30 [ 20.503310] __handle_mm_fault+0x1d8f/0x3ce0 [ 20.507686] ? __pmd_alloc+0x4e0/0x4e0 [ 20.511536] ? __save_stack_trace+0x7e/0xd0 [ 20.515826] ? find_held_lock+0x35/0x1d0 [ 20.519854] ? handle_mm_fault+0x248/0x8d0 [ 20.524052] ? lock_downgrade+0x980/0x980 [ 20.528181] handle_mm_fault+0x334/0x8d0 [ 20.532207] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 20.536753] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 20.542688] ? find_vma+0x30/0x150 [ 20.546196] __get_user_pages+0x50c/0x15f0 [ 20.550408] ? follow_page_mask+0x17f0/0x17f0 [ 20.554870] ? lock_acquire+0x1d5/0x580 [ 20.558808] ? lock_acquire+0x1d5/0x580 [ 20.562744] ? __mm_populate+0x2c7/0x450 [ 20.566772] ? lock_release+0xa40/0xa40 [ 20.571066] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 20.576916] ? rcu_note_context_switch+0x710/0x710 [ 20.581815] populate_vma_page_range+0x20e/0x2f0 [ 20.586539] ? get_user_pages+0xc0/0xc0 [ 20.590478] ? vmacache_find+0x5f/0x280 [ 20.594421] ? vmacache_update+0xfe/0x130 [ 20.598536] ? find_vma+0x30/0x150 [ 20.602041] __mm_populate+0x23a/0x450 [ 20.605895] ? populate_vma_page_range+0x2f0/0x2f0 [ 20.610787] ? down_read_killable+0x180/0x180 [ 20.615246] ? security_mmap_file+0x143/0x180 [ 20.619709] vm_mmap_pgoff+0x241/0x280 [ 20.623562] ? vma_is_stack_for_current+0xa0/0xa0 [ 20.628376] ? selinux_capable+0x40/0x40 [ 20.632406] SyS_mmap_pgoff+0x462/0x5f0 [ 20.636351] ? find_mergeable_anon_vma+0xd0/0xd0 [ 20.641074] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 20.646055] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 20.650779] SyS_mmap+0x16/0x20 [ 20.654024] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 20.658743] RIP: 0033:0x449529 [ 20.661896] RSP: 002b:00007f630b02cd98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 20.669575] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449529 [ 20.676824] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 20.684064] RBP: 00000000006dac20 R08: 0000000000000089 R09: 0000000000000000 [ 20.691307] R10: 0000000000008011 R11: 0000000000000212 R12: 977e79a25a843e8f [ 20.698542] R13: 6273752f7665642f R14: 74656e2f7665642f R15: 000000000000000b [ 20.705783] 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 [ 20.724929] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8f0f510 [ 20.731481] ---[ end trace adcac27d254ff402 ]--- [ 20.736388] Kernel panic - not syncing: Fatal exception [ 20.742156] Dumping ftrace buffer: [ 20.745662] (ftrace buffer empty) [ 20.749342] Kernel Offset: disabled [ 20.752937] Rebooting in 86400 seconds..