2017/08/16 22:16:00 parsed 1 programs 2017/08/16 22:16:00 executed programs: 0 syzkaller login: [ 97.921623] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 97.940214] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 97.946364] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 97.952511] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 97.959027] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 97.966599] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 97.974399] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 97.981407] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 97.989942] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 97.997393] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.004341] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.010487] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.016760] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.022900] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.037316] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.056390] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.068388] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.082206] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.089532] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.099060] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.111106] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.124472] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.132446] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.144048] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.166259] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.190442] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.202995] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.214593] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.222217] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.229422] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.235823] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.243642] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.251130] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.260425] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.288505] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.296633] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.302613] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.309383] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.317490] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.326163] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.334406] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.344920] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.355306] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.369105] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.375498] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.385321] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.392885] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.402294] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.410151] TCP: request_sock_TCP: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. [ 98.413886] kasan: CONFIG_KASAN_INLINE enabled [ 98.414588] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 98.415265] general protection fault: 0000 [#1] SMP KASAN [ 98.415990] Dumping ftrace buffer: [ 98.416338] (ftrace buffer empty) [ 98.416987] Modules linked in: [ 98.417554] CPU: 2 PID: 3217 Comm: syz-executor0 Not tainted 4.13.0-rc5-next-20170816+ #4 [ 98.419006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 98.420344] task: ffff88003b90c580 task.stack: ffff88003be78000 [ 98.421845] RIP: 0010:skb_release_data+0x26c/0x790 [ 98.422394] RSP: 0018:ffff88003be7eda8 EFLAGS: 00010206 [ 98.422939] RAX: 01d22b4e8de7cac9 RBX: dffffc0000000000 RCX: 1ffff100077cfde4 [ 98.423516] RDX: 0000000000000000 RSI: ffff88006aaec87c RDI: 0e915a746f3e564b [ 98.424036] RBP: ffff88003be7eec8 R08: 0000000000000001 R09: 000060ff91e0d670 [ 98.424710] R10: ffff88003be7f6b0 R11: ffffffff85b34c40 R12: ffff88003c1701b0 [ 98.425274] R13: ffffed00077cfdcc R14: 1ffff100077cfdc4 R15: 0e915a746f3e562b [ 98.425953] FS: 00007f6d8fbba700(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000 [ 98.426680] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.427227] CR2: 0000000020013000 CR3: 000000006a050000 CR4: 00000000000006e0 [ 98.427880] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.428549] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.429131] Call Trace: [ 98.429383] ? skb_tx_error+0x2c0/0x2c0 [ 98.429768] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 98.430220] ? uncharge_batch+0x340/0x340 [ 98.430563] ? kfree_skbmem+0xe2/0x1d0 [ 98.430933] ? should_fail+0x23b/0xa40 [ 98.431330] ? skb_to_sgvec_nomark+0x40/0x40 [ 98.431712] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 98.432128] skb_release_all+0x4a/0x60 [ 98.432432] kfree_skb+0x15d/0x4c0 [ 98.432720] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 98.433188] ? ip_rcv+0x40a/0x17d0 [ 98.433527] ? __kfree_skb+0x20/0x20 [ 98.433804] ? lock_acquire+0x1d5/0x580 [ 98.434128] ? lock_acquire+0x1d5/0x580 [ 98.434402] ? __is_insn_slot_addr+0x1fc/0x330 [ 98.434734] ? lock_downgrade+0x990/0x990 [ 98.435071] ? lock_release+0xa40/0xa40 [ 98.435346] ? __read_once_size_nocheck.constprop.8+0x10/0x10 [ 98.435803] ? entry_SYSCALL_64_fastpath+0x1f/0xbe [ 98.436181] ? bpf_prog_kallsyms_find+0xbd/0x440 [ 98.436556] ip_rcv+0x40a/0x17d0 [ 98.436804] ? lock_acquire+0x1d5/0x580 [ 98.437116] ? ip_local_deliver+0x6d0/0x6d0 [ 98.437453] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 98.437883] ? lock_release+0xa40/0xa40 [ 98.438163] ? __free_insn_slot+0x5c0/0x5c0 [ 98.438520] ? unwind_dump+0x4c0/0x4c0 [ 98.438830] ? ip_local_deliver+0x6d0/0x6d0 [ 98.439170] __netif_receive_skb_core+0x19af/0x33d0 [ 98.439584] ? unwind_get_return_address+0x61/0xa0 [ 98.440009] ? nf_ingress+0x9f0/0x9f0 [ 98.440343] ? save_stack+0xa3/0xd0 [ 98.440668] ? save_stack_trace+0x16/0x20 [ 98.441029] ? save_stack+0x43/0xd0 [ 98.441350] ? kasan_kmalloc+0xad/0xe0 [ 98.441682] ? kasan_slab_alloc+0x12/0x20 [ 98.442410] ? kmem_cache_alloc+0x12e/0x760 [ 98.442762] ? __build_skb+0x9d/0x450 [ 98.443112] ? build_skb+0x6f/0x260 [ 98.443457] ? tun_get_user+0x1db7/0x2150 [ 98.443820] ? tun_chr_write_iter+0xd8/0x190 [ 98.444188] ? __vfs_write+0x684/0x970 [ 98.444483] ? vfs_write+0x189/0x510 [ 98.444802] ? SyS_write+0xef/0x220 [ 98.445139] ? entry_SYSCALL_64_fastpath+0x1f/0xbe [ 98.445558] ? skb_copy_bits+0x4a5/0x6c0 [ 98.445915] ? __skb_flow_dissect+0xfa6/0x3ad0 [ 98.446318] ? __sched_text_start+0x8/0x8 [ 98.446679] ? __skb_flow_get_ports+0x400/0x400 [ 98.447088] ? lock_acquire+0x1d5/0x580 [ 98.447440] ? netif_receive_skb_internal+0x1d7/0x5e0 [ 98.447896] ? lock_downgrade+0x990/0x990 [ 98.448259] ? pvclock_read_flags+0x160/0x160 [ 98.448643] ? __build_skb+0x325/0x450 [ 98.448981] ? lock_acquire+0x1d5/0x580 [ 98.449324] ? lock_acquire+0x1d5/0x580 [ 98.449664] ? netif_receive_skb_internal+0x93/0x5e0 [ 98.450102] ? ktime_get_with_offset+0x2c1/0x420 [ 98.450507] ? lock_release+0xa40/0xa40 [ 98.450831] ? do_gettimeofday+0x190/0x190 [ 98.451122] ? __build_skb+0x450/0x450 [ 98.451386] __netif_receive_skb+0x2c/0x1b0 [ 98.451680] ? __netif_receive_skb+0x2c/0x1b0 [ 98.451983] netif_receive_skb_internal+0x10b/0x5e0 [ 98.452343] ? dev_cpu_dead+0xb00/0xb00 [ 98.452611] ? tun_device_event+0xca0/0xca0 [ 98.452980] ? futex_wake+0x680/0x680 [ 98.453339] ? drop_futex_key_refs.isra.13+0x63/0xb0 [ 98.453781] netif_receive_skb+0xae/0x390 [ 98.454138] ? netif_receive_skb_internal+0x5e0/0x5e0 [ 98.454581] ? futex_wait_setup+0x3d0/0x3d0 [ 98.454954] ? tun_rx_batched.isra.43+0x5bd/0x860 [ 98.455368] tun_rx_batched.isra.43+0x5e7/0x860 [ 98.455796] ? skb_get_hash_perturb+0x9d0/0x9d0 [ 98.456193] ? tun_sock_write_space+0x370/0x370 [ 98.456613] ? inet_csk_get_port+0xd81/0x1eb0 [ 98.457018] ? tun_free_netdev+0x1b0/0x1b0 [ 98.457395] tun_get_user+0x11dd/0x2150 [ 98.457748] ? tun_flow_update+0xf70/0xf70 [ 98.458111] ? lock_acquire+0x1d5/0x580 [ 98.458454] ? lock_acquire+0x1d5/0x580 [ 98.458792] ? __tun_get+0x1ab/0x2e0 [ 98.459111] ? lock_downgrade+0x990/0x990 [ 98.459474] ? lock_release+0xa40/0xa40 [ 98.459818] ? __fget+0x35c/0x570 [ 98.460116] ? __fget+0x35c/0x570 [ 98.460419] ? __tun_get+0x1d4/0x2e0 [ 98.460736] ? tun_chr_close+0x60/0x60 [ 98.461071] ? release_sock+0x1d4/0x2a0 [ 98.461410] tun_chr_write_iter+0xd8/0x190 [ 98.461773] __vfs_write+0x684/0x970 [ 98.462097] ? default_llseek+0x290/0x290 [ 98.462460] ? _cond_resched+0x14/0x30 [ 98.462803] ? avc_policy_seqno+0x9/0x20 [ 98.463154] ? selinux_file_permission+0x82/0x460 [ 98.463835] ? rw_verify_area+0xe5/0x2b0 [ 98.464182] ? __fdget_raw+0x20/0x20 [ 98.464505] vfs_write+0x189/0x510 [ 98.464812] SyS_write+0xef/0x220 [ 98.465113] ? SyS_read+0x220/0x220 [ 98.465425] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 98.465833] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 98.466237] RIP: 0033:0x40bab1 [ 98.466506] RSP: 002b:00007f6d8fbb9c00 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [ 98.467156] RAX: ffffffffffffffda RBX: 0000000000000011 RCX: 000000000040bab1 [ 98.467788] RDX: 0000000000000011 RSI: 000000002001df3f RDI: 0000000000000003 [ 98.468412] RBP: 000000000000003a R08: 0000000000000000 R09: 0000000000000000 [ 98.469033] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff [ 98.469651] R13: 0000000000005590 R14: 00000000006e7650 R15: 0000000000000002 [ 98.470273] Code: c6 e8 c9 68 8d fd 4c 89 e0 48 c1 e8 03 80 3c 18 00 0f 85 93 04 00 00 4d 8b 3c 24 41 c6 45 00 00 49 8d 7f 20 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 6b 04 00 00 41 80 7d 00 00 49 8b 47 20 0f 85 [ 98.471974] RIP: skb_release_data+0x26c/0x790 RSP: ffff88003be7eda8 [ 98.472545] ---[ end trace 6ed34ccdad0c850e ]--- [ 98.472949] Kernel panic - not syncing: Fatal exception in interrupt [ 98.473527] Dumping ftrace buffer: [ 98.473829] (ftrace buffer empty) [ 98.474143] Kernel Offset: disabled [ 98.474453] Rebooting in 86400 seconds..