[....] Starting enhanced syslogd: rsyslogd[ 11.177488] audit: type=1400 audit(1514308953.750:5): 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 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: [ 16.046520] audit: type=1400 audit(1514308958.619:6): 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-next-kasan-gce-8,10.128.0.22' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program [ 38.822920] audit: type=1400 audit(1514308981.395:7): avc: denied { map } for pid=3146 comm="syzkaller907950" path="/root/syzkaller907950889" 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 executing program executing program executing program [ 38.849143] audit: type=1400 audit(1514308981.395:8): avc: denied { map } for pid=3146 comm="syzkaller907950" path="/dev/usbmon0" dev="devtmpfs" ino=114 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 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 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 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 executing program [ 39.275176] page:000000004d2ea8be count:0 mapcount:0 mapping: (null) index:0x0 [ 39.283425] flags: 0x2fffc0000000000() [ 39.287410] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 39.295308] raw: ffffea000720b5e0 ffffea0006f26360 0000000000000000 0000000000000000 [ 39.303542] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 39.310629] ------------[ cut here ]------------ [ 39.315353] kernel BUG at ./include/linux/mm.h:844! [ 39.320371] invalid opcode: 0000 [#1] SMP KASAN [ 39.325008] Dumping ftrace buffer: [ 39.328510] (ftrace buffer empty) [ 39.332185] Modules linked in: [ 39.335354] CPU: 1 PID: 3147 Comm: syzkaller907950 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 39.343892] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.353225] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 39.358206] RSP: 0018:ffff8801c8a6f510 EFLAGS: 00010203 [ 39.363543] RAX: 0000000000000000 RBX: 1ffff1003914dea4 RCX: 0000000000000000 [ 39.371395] RDX: 0000000000000000 RSI: 1ffff1003914ddee RDI: ffffed003914de90 [ 39.378632] RBP: ffff8801c8a6f5e8 R08: 1ffff1003914ddb0 R09: 0000000000000000 [ 39.385866] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003914dea8 [ 39.393104] R13: dffffc0000000000 R14: ffff8801c8a6f840 R15: ffffea0006f26400 [ 39.400342] FS: 00007eff921e5700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 39.408533] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.414380] CR2: 0000000020403fb0 CR3: 00000001c8a79002 CR4: 00000000001606e0 [ 39.421618] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.428855] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.436100] Call Trace: [ 39.438667] ? mon_alloc_buff+0x1a0/0x1a0 [ 39.442779] ? find_held_lock+0x35/0x1d0 [ 39.446815] __do_fault+0xeb/0x30f [ 39.450320] ? vma_gap_callbacks_rotate+0x62/0x80 [ 39.455131] ? pte_offset_kernel+0xc7/0xc7 [ 39.459338] ? print_irqtrace_events+0x270/0x270 [ 39.464061] ? rb_insert_color_cached+0x1660/0x1660 [ 39.469046] ? vma_compute_subtree_gap+0x200/0x200 [ 39.473940] ? rb_insert_color_cached+0x1660/0x1660 [ 39.478923] ? check_noncircular+0x20/0x20 [ 39.483126] __handle_mm_fault+0x1d8f/0x3ce0 [ 39.487503] ? __pmd_alloc+0x4e0/0x4e0 [ 39.491360] ? find_held_lock+0x35/0x1d0 [ 39.495390] ? handle_mm_fault+0x2a0/0x930 [ 39.499589] ? lock_downgrade+0x980/0x980 [ 39.503713] handle_mm_fault+0x38f/0x930 [ 39.507741] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 39.512291] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.518140] ? find_vma+0x30/0x150 [ 39.521651] __get_user_pages+0x50c/0x15f0 [ 39.525866] ? follow_page_mask+0x17f0/0x17f0 [ 39.530339] ? vma_link+0xe9/0x170 [ 39.533846] ? lock_acquire+0x1d5/0x580 [ 39.537783] ? lock_acquire+0x1d5/0x580 [ 39.541731] ? __mm_populate+0x2c7/0x450 [ 39.545762] ? lock_release+0xa40/0xa40 [ 39.549701] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.555549] ? rcu_note_context_switch+0x710/0x710 [ 39.560446] populate_vma_page_range+0x20e/0x2f0 [ 39.565172] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 39.570066] ? vmacache_find+0x5f/0x280 [ 39.574004] ? vmacache_update+0xfe/0x130 [ 39.578126] ? find_vma+0x30/0x150 [ 39.581630] __mm_populate+0x23a/0x450 [ 39.585486] ? populate_vma_page_range+0x2f0/0x2f0 [ 39.590390] ? down_read_killable+0x180/0x180 [ 39.594850] ? security_mmap_file+0x143/0x180 [ 39.599325] vm_mmap_pgoff+0x241/0x280 [ 39.603180] ? vma_is_stack_for_current+0xa0/0xa0 [ 39.607990] ? get_unused_fd_flags+0x121/0x190 [ 39.612544] SyS_mmap_pgoff+0x462/0x5f0 [ 39.616486] ? find_mergeable_anon_vma+0xd0/0xd0 [ 39.621206] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.626188] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.630915] SyS_mmap+0x16/0x20 [ 39.634171] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 39.638892] RIP: 0033:0x4496e9 [ 39.642049] RSP: 002b:00007eff921e4cd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 39.649730] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004496e9 [ 39.656975] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 39.664211] RBP: 00000000006dac20 R08: 00000000000001b6 R09: 0000000000000000 [ 39.671448] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 39.678682] R13: 00007ffe454d390f R14: 00007eff921e59c0 R15: 0000000000000009 [ 39.685969] 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 eb f2 96 fd 48 c7 c6 20 1f d1 85 4c 89 ff e8 8c b4 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 f2 96 fd [ 39.705054] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8a6f510 [ 39.711590] ---[ end trace ad1a8b9142b4e663 ]--- [ 39.716539] Kernel panic - not syncing: Fatal exception [ 39.722218] Dumping ftrace buffer: [ 39.725725] (ftrace buffer empty) [ 39.729403] Kernel Offset: disabled [ 39.732998] Rebooting in 86400 seconds..