[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.565895] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.160224] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 26.663315] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 27.390297] random: sshd: uninitialized urandom read (32 bytes read, 76 bits of entropy available) [ 106.565451] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. [ 111.963567] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available) 2018/08/15 06:17:25 parsed 1 programs [ 113.269506] random: cc1: uninitialized urandom read (8 bytes read, 110 bits of entropy available) 2018/08/15 06:17:26 executed programs: 0 [ 114.325262] IPVS: Creating netns size=2552 id=1 [ 114.385763] IPVS: Creating netns size=2552 id=2 [ 114.435500] IPVS: Creating netns size=2552 id=3 [ 114.498109] IPVS: Creating netns size=2552 id=4 [ 114.574900] IPVS: Creating netns size=2552 id=5 [ 114.695036] IPVS: Creating netns size=2552 id=6 [ 114.802149] IPVS: Creating netns size=2552 id=7 [ 114.810131] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 114.882298] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 114.885834] IPVS: Creating netns size=2552 id=8 [ 115.062126] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 115.110408] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 115.128033] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 115.157974] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 115.256864] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 115.317079] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 115.463240] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 115.495568] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 115.505714] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 115.543644] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 115.568916] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 115.578014] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 115.626321] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 115.655353] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 115.721027] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 115.750815] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 115.780766] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 115.797707] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 115.853252] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 115.863070] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 115.905019] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 115.997511] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 116.038723] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 116.047454] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 116.096091] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 116.108649] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 116.125647] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 116.184147] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 116.275505] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 116.288245] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 116.300607] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 116.313551] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 116.374948] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 116.388664] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 116.397662] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 116.412031] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 116.467303] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 116.556286] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 116.570620] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 116.648934] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 116.669173] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 116.767044] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 116.784198] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 116.851204] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 116.862866] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 116.873610] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 116.912611] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 116.945803] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 117.021699] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 117.033890] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 117.073179] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 117.093707] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 117.110025] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 117.222919] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 117.483325] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 117.546800] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 117.583672] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 117.654203] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 117.676152] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 117.738790] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 117.771571] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 117.835588] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes [ 121.457685] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 121.684311] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 121.747704] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 121.935042] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 121.981143] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 122.041981] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 122.138333] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 122.190060] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 122.300912] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 122.401016] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 122.436082] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 122.681804] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 122.944038] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 122.974884] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 123.192570] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 123.270025] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 2018/08/15 06:17:36 executed programs: 8 [ 125.912364] l2tp_core: tunl 4: sockfd_lookup(fd=5) returned -9 [ 127.950532] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 127.958824] IP: [] l2tp_session_create+0x948/0x1030 [ 127.965555] PGD b12e6067 PUD afc26067 PMD 0 [ 127.970352] Oops: 0002 [#1] PREEMPT SMP KASAN [ 127.975385] Dumping ftrace buffer: [ 127.978917] (ftrace buffer empty) [ 127.982604] Modules linked in: [ 127.985893] CPU: 1 PID: 7375 Comm: syz-executor3 Not tainted 4.4.147-ga5fc665 #16 [ 127.993489] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 128.002821] task: ffff8800bb08b000 task.stack: ffff8801d86f0000 [ 128.008853] RIP: 0010:[] [] l2tp_session_create+0x948/0x1030 [ 128.018003] RSP: 0018:ffff8801d86f7ad0 EFLAGS: 00010246 [ 128.023456] RAX: 0000000000000000 RBX: ffff8800b9cbea00 RCX: 0000000000000000 [ 128.030705] RDX: 1ffff10017397d70 RSI: ffffffff835a1033 RDI: ffff8800b9cbeb80 [ 128.037957] RBP: ffff8801d86f7b40 R08: ffff8800bb08b900 R09: 0000000000000000 [ 128.045207] R10: 0000000000000000 R11: ffffffff8463a1e0 R12: ffff8800b469c5a8 [ 128.052501] R13: ffff8801d86f7c58 R14: ffff8800b469c500 R15: ffffffff835a0b10 [ 128.059754] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f77f2b40 [ 128.067974] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 128.073852] CR2: 0000000000000080 CR3: 00000000b6755000 CR4: 00000000001606f0 [ 128.081108] Stack: [ 128.083236] ffffffff8113fc2a ffff8800b9cbea20 ffff8800b469c658 ffff8800b469c510 [ 128.091227] ffffffff838c85b0 ffff8800b469c5b0 ffff8800b469c650 ffff8800b9cbeae0 [ 128.099237] ffffffff00000000 ffff8801d9084400 0000000000000000 ffff8801d9084430 [ 128.107237] Call Trace: [ 128.109827] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 128.116129] [] ? _raw_read_unlock_bh+0x30/0x40 [ 128.122345] [] pppol2tp_connect+0x10f0/0x1910 [ 128.128472] [] ? pppol2tp_recv+0x320/0x320 [ 128.134348] [] ? security_socket_connect+0x8f/0xc0 [ 128.140911] [] SYSC_connect+0x1b8/0x300 [ 128.146515] [] ? SYSC_bind+0x280/0x280 [ 128.152032] [] ? get_unused_fd_flags+0xd0/0xd0 [ 128.158247] [] ? compat_SyS_get_robust_list+0x310/0x310 [ 128.165246] [] ? SyS_socket+0x121/0x1b0 [ 128.170940] [] ? move_addr_to_kernel+0x50/0x50 [ 128.177169] [] SyS_connect+0x24/0x30 [ 128.182529] [] ? SyS_accept+0x30/0x30 [ 128.187963] [] do_fast_syscall_32+0x324/0x8b0 [ 128.194096] [] sysenter_flags_fixed+0xd/0x1a [ 128.200162] Code: 00 00 48 8d bb 80 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 36 06 00 00 48 8b 83 80 01 00 00 ff 80 80 00 00 00 48 8d 43 20 48 89 c7 48 89 45 b0 e8 f1 13 [ 128.227274] RIP [] l2tp_session_create+0x948/0x1030 [ 128.234062] RSP [ 128.237689] CR2: 0000000000000080 [ 128.241702] ---[ end trace f8406555c50619d3 ]--- [ 128.246473] Kernel panic - not syncing: Fatal exception [ 128.252105] Dumping ftrace buffer: [ 128.255647] (ftrace buffer empty) [ 128.259336] Kernel Offset: disabled [ 128.262941] Rebooting in 86400 seconds..