Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 10.654460] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 11.765466] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.85' (ECDSA) to the list of known hosts. 2019/08/16 09:09:24 parsed 1 programs 2019/08/16 09:09:27 executed programs: 0 syzkaller login: [ 37.667236] audit: type=1400 audit(1565946567.438:5): avc: denied { associate } for pid=2067 comm="syz-executor.0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 [ 38.009919] ------------[ cut here ]------------ [ 38.014676] kernel BUG at ./include/linux/skbuff.h:1294! [ 38.020098] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 38.025430] Modules linked in: [ 38.028715] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.189+ #1 [ 38.034916] task: 00000000a9eb28ed task.stack: 00000000099611de [ 38.040943] RIP: 0010:[] [<000000005d970085>] tcp_fragment+0x1266/0x1390 [ 38.049556] RSP: 0018:ffff8801db707b90 EFLAGS: 00010206 [ 38.054980] RAX: ffff8801da6b2f80 RBX: ffff8801d1790000 RCX: 1ffff1003a2f207d [ 38.062223] RDX: 0000000000000100 RSI: ffffffff8252ad76 RDI: ffff8801cb6c1b88 [ 38.069465] RBP: ffff8801db707be0 R08: 0000000002080020 R09: ffff8801cb6c1ba8 [ 38.076709] R10: ffff88021fffd050 R11: 0000000953c6deec R12: 0000000000000000 [ 38.083951] R13: ffff8801d17901f0 R14: ffff8801cb6c1b80 R15: ffff8801d1790244 [ 38.091193] FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 [ 38.099400] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.105254] CR2: 000000000075c000 CR3: 00000001ceb61000 CR4: 00000000001606b0 [ 38.112500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.119763] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.127009] Stack: [ 38.129132] ffff8801cb6c1b80 ffff8801d17901f0 ffff8801cb6c1bf8 ffff880102080020 [ 38.137124] 000068000000ffcb 0000000000006800 ffff8801d1790000 ffff8801cb6c1b80 [ 38.145116] 000000000000ffcb ffff8801cb6c1bb4 ffff8801db707c30 ffffffff8253e6d5 [ 38.153132] Call Trace: [ 38.155688] [ 38.157731] [<00000000a83f95e1>] tcp_write_wakeup+0x345/0x5b0 [ 38.163710] [<000000009332ab88>] tcp_send_probe0+0x4b/0x400 [ 38.169492] [<000000005978249b>] tcp_write_timer_handler+0x6a0/0x7a0 [ 38.176042] [<0000000006619ca6>] tcp_write_timer+0xc5/0x190 [ 38.181820] [<00000000767b5718>] call_timer_fn+0x167/0x6d0 [ 38.187503] [<00000000853f71c5>] ? call_timer_fn+0xde/0x6d0 [ 38.193274] [<000000004709f587>] ? free_object+0x2b0/0x2b0 [ 38.198969] [<00000000fd25a9d4>] ? tcp_write_timer_handler+0x7a0/0x7a0 [ 38.205700] [<000000004dfc7480>] ? process_timeout+0x20/0x20 [ 38.211558] [<000000006967054f>] ? _raw_spin_unlock_irq+0x28/0x60 [ 38.217851] [<00000000fd25a9d4>] ? tcp_write_timer_handler+0x7a0/0x7a0 [ 38.224579] [<000000000ae0bba6>] ? trace_hardirqs_on_caller+0x260/0x5a0 [ 38.231392] [<00000000fd25a9d4>] ? tcp_write_timer_handler+0x7a0/0x7a0 [ 38.238117] [<000000004b4a58ad>] expire_timers+0x25b/0x5c0 [ 38.243801] [<00000000c0ae8e27>] run_timer_softirq+0x1ff/0x620 [ 38.249841] [<0000000032103250>] ? expire_timers+0x5c0/0x5c0 [ 38.255708] [<00000000d91f6ca8>] ? check_preemption_disabled+0x3c/0x200 [ 38.262522] [<00000000d91f6ca8>] ? check_preemption_disabled+0x3c/0x200 [ 38.269336] [<000000001d60fcc2>] __do_softirq+0x22d/0x964 [ 38.274938] [<00000000c966bad5>] ? hrtimer_interrupt+0x34b/0x450 [ 38.281187] [<00000000d91f6ca8>] ? check_preemption_disabled+0x3c/0x200 [ 38.288009] [<000000000f4de382>] irq_exit+0x119/0x160 [ 38.293263] [<000000001c4148b4>] smp_apic_timer_interrupt+0x7e/0xb0 [ 38.299727] [<000000008e94ac25>] apic_timer_interrupt+0xa5/0xb0 [ 38.305842] [ 38.307883] [<00000000f490af06>] ? native_safe_halt+0x41/0x60 [ 38.313847] [<00000000ebd30c63>] default_idle+0x56/0x370 [ 38.319360] [<00000000599e5156>] arch_cpu_idle+0x10/0x20 [ 38.324880] [<000000000a7609e3>] default_idle_call+0x36/0x60 [ 38.330741] [<000000000390f32e>] cpu_startup_entry+0x283/0x3a0 [ 38.336797] [<0000000080d03cf7>] ? cpu_in_idle+0x20/0x20 [ 38.342348] [<00000000dc26dc52>] start_secondary+0x31c/0x410 [ 38.348210] [<0000000081950d95>] ? set_cpu_sibling_map+0x1290/0x1290 [ 38.354757] Code: c1 ea 03 80 3c 02 00 0f 85 3a 01 00 00 4c 8b ab f8 01 00 00 ba 00 00 00 00 4c 3b 6d b8 4c 0f 44 ea e9 f9 fc ff ff e8 fa 75 df fe <0f> 0b e8 33 37 fd fe e9 6e f0 ff ff e8 29 37 fd fe e9 68 f3 ff [ 38.381691] RIP [<000000005d970085>] tcp_fragment+0x1266/0x1390 [ 38.387940] RSP [ 38.391588] ---[ end trace aa12cf99faae09b4 ]--- [ 38.396332] Kernel panic - not syncing: Fatal exception in interrupt [ 38.403225] Kernel Offset: disabled [ 38.406839] Rebooting in 86400 seconds..