[....] Starting enhanced syslogd: rsyslogd[ 10.588004] audit: type=1400 audit(1514209648.767:5): avc: denied { syslog } for pid=2997 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: [ 15.777183] audit: type=1400 audit(1514209653.956:6): avc: denied { map } for pid=3137 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-3,10.128.0.18' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 21.952960] audit: type=1400 audit(1514209660.132:7): avc: denied { map } for pid=3151 comm="syzkaller093189" path="/root/syzkaller093189423" 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 [ 21.979232] audit: type=1400 audit(1514209660.138:8): avc: denied { map } for pid=3151 comm="syzkaller093189" path="/dev/usbmon0" dev="devtmpfs" ino=8916 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 [ 22.009617] page:ffffea0007257400 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.018042] flags: 0x2fffc0000000000() [ 22.021939] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.029828] raw: ffffea00072354a0 ffffea00072ccba0 0000000000000000 0000000000000000 [ 22.037743] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.044847] ------------[ cut here ]------------ [ 22.049577] kernel BUG at ./include/linux/mm.h:844! [ 22.054631] invalid opcode: 0000 [#1] SMP KASAN [ 22.059268] Dumping ftrace buffer: [ 22.062773] (ftrace buffer empty) [ 22.066448] Modules linked in: [ 22.069610] CPU: 0 PID: 3152 Comm: syzkaller093189 Not tainted 4.15.0-rc4-mm1+ #49 [ 22.077281] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.086612] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.091602] RSP: 0018:ffff8801c850f510 EFLAGS: 00010203 [ 22.096932] RAX: 0000000000000000 RBX: 1ffff100390a1ea4 RCX: 0000000000000000 [ 22.104169] RDX: 0000000000000000 RSI: 1ffff100390a1dee RDI: ffffed00390a1e90 [ 22.111406] RBP: ffff8801c850f5e8 R08: 1ffff100390a1db0 R09: 0000000000000000 [ 22.118643] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100390a1ea8 [ 22.125880] R13: dffffc0000000000 R14: ffff8801c850f840 R15: ffffea0007257400 [ 22.133118] FS: 00007f02f5e26700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.141323] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.147174] CR2: 0000000020000000 CR3: 00000001d99f6004 CR4: 00000000001606f0 [ 22.154413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.161650] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.168886] Call Trace: [ 22.171452] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.175569] ? find_held_lock+0x35/0x1d0 [ 22.179608] __do_fault+0xeb/0x30f [ 22.183115] ? vma_gap_callbacks_rotate+0x62/0x80 [ 22.187923] ? pte_offset_kernel+0xc7/0xc7 [ 22.192124] ? print_irqtrace_events+0x270/0x270 [ 22.196845] ? rb_insert_color_cached+0x1660/0x1660 [ 22.201827] ? vma_compute_subtree_gap+0x200/0x200 [ 22.206737] ? rb_insert_color_cached+0x1660/0x1660 [ 22.211720] ? check_noncircular+0x20/0x20 [ 22.215924] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.220311] ? __pmd_alloc+0x4e0/0x4e0 [ 22.224169] ? find_held_lock+0x35/0x1d0 [ 22.228198] ? handle_mm_fault+0x2a0/0x930 [ 22.232398] ? lock_downgrade+0x980/0x980 [ 22.236524] handle_mm_fault+0x38f/0x930 [ 22.240553] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.245115] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.250975] ? find_vma+0x30/0x150 [ 22.254487] __get_user_pages+0x50c/0x15f0 [ 22.258698] ? follow_page_mask+0x17f0/0x17f0 [ 22.263163] ? vma_link+0xe9/0x170 [ 22.266672] ? lock_acquire+0x1d5/0x580 [ 22.270611] ? lock_acquire+0x1d5/0x580 [ 22.274556] ? __mm_populate+0x2c7/0x450 [ 22.278588] ? lock_release+0xa40/0xa40 [ 22.282528] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.288379] ? rcu_note_context_switch+0x710/0x710 [ 22.293282] populate_vma_page_range+0x20e/0x2f0 [ 22.298019] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 22.302916] ? vmacache_find+0x5f/0x280 [ 22.306855] ? vmacache_update+0xfe/0x130 [ 22.310974] ? find_vma+0x30/0x150 [ 22.314480] __mm_populate+0x23a/0x450 [ 22.318337] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.323234] ? down_read_killable+0x180/0x180 [ 22.327701] ? security_mmap_file+0x143/0x180 [ 22.332166] vm_mmap_pgoff+0x241/0x280 [ 22.336027] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.340835] ? putname+0xee/0x130 [ 22.344266] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.349261] ? kmem_cache_free+0x267/0x2a0 [ 22.353470] SyS_mmap_pgoff+0x462/0x5f0 [ 22.357413] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.362138] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.367123] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.371851] SyS_mmap+0x16/0x20 [ 22.375102] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.379834] RIP: 0033:0x4497d9 [ 22.382989] RSP: 002b:00007f02f5e25cd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 22.390662] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004497d9 [ 22.397914] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.405151] RBP: 00000000006dac20 R08: 000000000000000a R09: 0000000000000000 [ 22.412385] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 22.419621] R13: 00007ffd1f5fd36f R14: 00007f02f5e269c0 R15: 0000000000000009 [ 22.426863] 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 [ 22.445940] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c850f510 [ 22.452493] ---[ end trace cb5711f24697f05e ]--- [ 22.457407] Kernel panic - not syncing: Fatal exception [ 22.463123] Dumping ftrace buffer: [ 22.466636] (ftrace buffer empty) [ 22.470322] Kernel Offset: disabled [ 22.473917] Rebooting in 86400 seconds..