[....] Starting enhanced syslogd: rsyslogd[ 14.069396] audit: type=1400 audit(1512722324.240:5): 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: [ 35.198285] audit: type=1400 audit(1512722345.368:6): avc: denied { map } for pid=3144 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-net-kasan-gce-2,10.128.0.12' (ECDSA) to the list of known hosts. [ 41.428236] audit: type=1400 audit(1512722351.599:7): avc: denied { map } for pid=3157 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2017/12/08 08:39:12 parsed 1 programs 2017/12/08 08:39:12 executed programs: 0 [ 41.901115] audit: type=1400 audit(1512722352.071:8): avc: denied { map } for pid=3157 comm="syz-execprog" path="/root/syzkaller-shm094515464" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 42.004087] skbuff: skb_over_panic: text:0000000007e415b1 len:196 put:20 head:000000001dd4bd1e data:00000000bcbe57b9 tail:0xd4 end:0xc0 dev:lo [ 42.018646] ------------[ cut here ]------------ [ 42.023414] kernel BUG at net/core/skbuff.c:104! [ 42.028211] invalid opcode: 0000 [#1] SMP KASAN [ 42.032852] Dumping ftrace buffer: [ 42.036359] (ftrace buffer empty) [ 42.040037] Modules linked in: [ 42.043209] CPU: 1 PID: 3172 Comm: syz-executor0 Not tainted 4.15.0-rc2+ #146 [ 42.050454] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.059781] task: 000000007e002c32 task.stack: 000000008ed6ae59 [ 42.065812] RIP: 0010:skb_panic+0x15c/0x1f0 [ 42.070098] RSP: 0000:ffff8801db507508 EFLAGS: 00010286 [ 42.075432] RAX: 0000000000000082 RBX: ffff8801c5ee3d00 RCX: 0000000000000000 [ 42.082670] RDX: 0000000000000082 RSI: 1ffff1003b6a0e61 RDI: ffffed003b6a0e95 [ 42.089914] RBP: ffff8801db507570 R08: 1ffff1003b6a0e23 R09: 0000000000000000 [ 42.097152] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff857d1be0 [ 42.104390] R13: ffffffff84737492 R14: 0000000000000014 R15: ffff8801c3ac0540 [ 42.111647] FS: 0000000001013940(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 42.119971] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.125844] CR2: 0000000020d09f80 CR3: 00000001c47bd000 CR4: 00000000001406e0 [ 42.133099] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.140354] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.147612] Call Trace: [ 42.150177] [ 42.152322] ? handle_mm_fault+0x334/0x8d0 [ 42.156542] ? __do_page_fault+0x5c9/0xc90 [ 42.160757] ? do_page_fault+0xee/0x720 [ 42.164710] ? add_grhead.isra.24+0x42/0x3b0 [ 42.169101] skb_put+0x181/0x1c0 [ 42.172452] add_grhead.isra.24+0x42/0x3b0 [ 42.176670] add_grec+0xa55/0x1060 [ 42.180191] ? check_noncircular+0x20/0x20 [ 42.184436] ? mld_sendpack+0xcc0/0xcc0 [ 42.188402] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 42.193405] ? trace_hardirqs_on+0xd/0x10 [ 42.197549] mld_ifc_timer_expire+0x4d2/0x770 [ 42.202038] call_timer_fn+0x23b/0x840 [ 42.205915] ? mld_dad_timer_expire+0x100/0x100 [ 42.210567] ? process_timeout+0x40/0x40 [ 42.214614] ? print_usage_bug+0x3f0/0x3f0 [ 42.218836] ? lock_downgrade+0x980/0x980 [ 42.222967] ? __run_timers+0x1ce/0xb60 [ 42.226925] ? lock_release+0xda0/0xda0 [ 42.230886] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 42.235887] ? mld_dad_timer_expire+0x100/0x100 [ 42.240542] ? mld_dad_timer_expire+0x100/0x100 [ 42.245197] __run_timers+0x7e1/0xb60 [ 42.248992] ? del_timer_sync+0x240/0x240 [ 42.253124] ? timerqueue_add+0x1e9/0x280 [ 42.257256] ? enqueue_hrtimer+0x162/0x490 [ 42.261484] ? find_held_lock+0x39/0x1d0 [ 42.265538] ? check_noncircular+0x20/0x20 [ 42.269765] ? print_usage_bug+0x3f0/0x3f0 [ 42.273988] ? lock_downgrade+0x980/0x980 [ 42.278118] ? lock_acquire+0x1d5/0x580 [ 42.282072] ? clockevents_program_event+0x163/0x2e0 [ 42.287159] ? __lock_is_held+0xbc/0x140 [ 42.291204] run_timer_softirq+0x4c/0xb0 [ 42.295251] __do_softirq+0x29d/0xbb2 [ 42.299046] ? __irqentry_text_end+0x4/0x4 [ 42.303267] ? do_timer+0x50/0x50 [ 42.306708] ? tick_nohz_handler+0x130/0x130 [ 42.311121] ? native_apic_msr_write+0x5c/0x80 [ 42.315697] ? do_raw_spin_trylock+0x190/0x190 [ 42.320269] ? lapic_next_event+0x54/0x80 [ 42.324410] ? clockevents_program_event+0x108/0x2e0 [ 42.329523] ? tick_program_event+0x83/0x100 [ 42.333929] ? __lock_is_held+0xbc/0x140 [ 42.337991] irq_exit+0x1d3/0x210 [ 42.341441] smp_apic_timer_interrupt+0x16b/0x700 [ 42.346289] ? smp_reschedule_interrupt+0xe6/0x670 [ 42.351218] ? smp_call_function_single_interrupt+0x640/0x640 [ 42.357084] ? _raw_spin_lock+0x32/0x40 [ 42.361056] ? handle_edge_irq+0x2b4/0x7c0 [ 42.365278] ? task_prio+0x40/0x40 [ 42.368807] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.373643] apic_timer_interrupt+0x9d/0xb0 [ 42.377944] [ 42.380161] RIP: 0010:___might_sleep+0x2a/0x470 [ 42.384803] RSP: 0000:ffff8801c38f7628 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11 [ 42.392486] RAX: dffffc0000000000 RBX: 1ffff1003871eec5 RCX: ffffffff819b7bac [ 42.399738] RDX: 0000000000000000 RSI: 00000000000011ef RDI: ffffffff853166a0 [ 42.406992] RBP: ffff8801c38f76a8 R08: 0000160000000000 R09: 0000000000000000 [ 42.415132] R10: ffffffffffffffe8 R11: 0000000000000000 R12: 0000000000000000 [ 42.422385] R13: ffffffff853166a0 R14: 00000000000011ef R15: ffffffff853166a0 [ 42.429651] ? clear_huge_page+0x18c/0x730 [ 42.433873] ? rcu_note_context_switch+0x710/0x710 [ 42.438791] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 42.444674] ? __might_sleep+0x95/0x190 [ 42.448646] clear_huge_page+0x19b/0x730 [ 42.452699] ? __raw_spin_lock_init+0x2d/0x100 [ 42.457272] do_huge_pmd_anonymous_page+0x59c/0x1b00 [ 42.462376] ? __thp_get_unmapped_area+0x130/0x130 [ 42.467303] ? __lock_acquire+0x6e9/0x47f0 [ 42.471530] ? __lock_acquire+0x6e9/0x47f0 [ 42.475760] ? futex_wait+0x69e/0x990 [ 42.479561] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 42.484739] ? __lock_acquire+0x6e9/0x47f0 [ 42.488957] ? __hrtimer_init+0x140/0x140 [ 42.493093] ? check_noncircular+0x20/0x20 [ 42.497325] __handle_mm_fault+0x1b9f/0x3e20 [ 42.501727] ? check_noncircular+0x20/0x20 [ 42.505944] ? __pmd_alloc+0x4e0/0x4e0 [ 42.509811] ? find_held_lock+0x39/0x1d0 [ 42.513859] ? lock_downgrade+0x980/0x980 [ 42.517986] ? __lock_is_held+0xbc/0x140 [ 42.522041] handle_mm_fault+0x334/0x8d0 [ 42.526080] ? down_read_trylock+0xdb/0x170 [ 42.530393] ? __do_page_fault+0x32d/0xc90 [ 42.535325] ? __handle_mm_fault+0x3e20/0x3e20 [ 42.539900] ? vmacache_find+0x5f/0x280 [ 42.543947] ? vmacache_update+0xfe/0x130 [ 42.548076] ? find_vma+0x30/0x150 [ 42.551604] __do_page_fault+0x5c9/0xc90 [ 42.555649] ? mm_fault_error+0x2c0/0x2c0 [ 42.559781] ? ktime_get_resolution_ns+0x300/0x300 [ 42.564695] ? __might_sleep+0x95/0x190 [ 42.568748] do_page_fault+0xee/0x720 [ 42.572561] ? __do_page_fault+0xc90/0xc90 [ 42.576798] ? SyS_futex+0x269/0x390 [ 42.580515] ? do_futex+0x2280/0x2280 [ 42.584303] ? entry_SYSCALL_64_fastpath+0x4b/0x96 [ 42.589222] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.597717] page_fault+0x22/0x30 [ 42.601214] RIP: 0033:0x439ed7 [ 42.604390] RSP: 002b:00007ffcf22a9878 EFLAGS: 00010202 [ 42.609745] RAX: 0000000020d09f80 RBX: 0000000000000002 RCX: 000000006cd355ff [ 42.616996] RDX: 0000000000000014 RSI: 00000000007601a8 RDI: 0000000020d09f80 [ 42.624246] RBP: 0000000000000014 R08: 0000000000000000 R09: 0000000000000000 [ 42.631503] R10: 00007ffcf22a9840 R11: 0000000000000206 R12: fffffffffffffffe [ 42.638760] R13: 0000000020d09f80 R14: 000000000000a407 R15: 0000000000000001 [ 42.646017] Code: 03 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 78 41 57 48 c7 c7 60 14 7d 85 52 56 4c 89 ea 41 50 4c 89 e6 45 89 f0 e8 c9 37 3f fd <0f> 0b 4c 89 4d b8 4c 89 45 c0 48 89 75 c8 48 89 55 d0 e8 4d f5 [ 42.665101] RIP: skb_panic+0x15c/0x1f0 RSP: ffff8801db507508 [ 42.670920] ---[ end trace 9770ba578c084242 ]--- [ 42.675682] Kernel panic - not syncing: Fatal exception in interrupt [ 42.682521] Dumping ftrace buffer: [ 42.686043] (ftrace buffer empty) [ 42.689732] Kernel Offset: disabled [ 42.693346] Rebooting in 86400 seconds..