[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.500576] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.249492] random: sshd: uninitialized urandom read (32 bytes read) [ 23.663175] random: sshd: uninitialized urandom read (32 bytes read) [ 24.497771] random: sshd: uninitialized urandom read (32 bytes read) [ 24.650739] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. [ 30.137161] random: sshd: uninitialized urandom read (32 bytes read) 2018/06/29 12:32:04 parsed 1 programs [ 31.622308] random: cc1: uninitialized urandom read (8 bytes read) 2018/06/29 12:32:06 executed programs: 0 [ 32.775430] IPVS: ftp: loaded support on port[0] = 21 [ 32.960638] bridge0: port 1(bridge_slave_0) entered blocking state [ 32.967116] bridge0: port 1(bridge_slave_0) entered disabled state [ 32.974594] device bridge_slave_0 entered promiscuous mode [ 32.990772] bridge0: port 2(bridge_slave_1) entered blocking state [ 32.997167] bridge0: port 2(bridge_slave_1) entered disabled state [ 33.004465] device bridge_slave_1 entered promiscuous mode [ 33.019391] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 33.034689] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 33.073940] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 33.092114] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 33.152323] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 33.159539] team0: Port device team_slave_0 added [ 33.173683] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 33.180763] team0: Port device team_slave_1 added [ 33.195517] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 33.212879] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 33.230180] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 33.246343] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 33.361780] bridge0: port 2(bridge_slave_1) entered blocking state [ 33.368226] bridge0: port 2(bridge_slave_1) entered forwarding state [ 33.375176] bridge0: port 1(bridge_slave_0) entered blocking state [ 33.381546] bridge0: port 1(bridge_slave_0) entered forwarding state [ 33.773731] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 33.779855] 8021q: adding VLAN 0 to HW filter on device bond0 [ 33.820883] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 33.861844] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 33.870089] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 33.906642] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 33.912757] 8021q: adding VLAN 0 to HW filter on device team0 [ 33.919447] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 34.154498] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 34.162516] PGD 1adf7c067 P4D 1adf7c067 PUD 1cebc6067 PMD 0 [ 34.168328] Oops: 0010 [#1] SMP KASAN [ 34.172111] CPU: 0 PID: 4809 Comm: syz-executor0 Not tainted 4.18.0-rc2+ #24 [ 34.179270] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.188610] RIP: 0010: (null) [ 34.192476] Code: Bad RIP value. [ 34.195828] RSP: 0018:ffff8801ad6bf518 EFLAGS: 00010246 [ 34.201169] RAX: 0000000000000000 RBX: ffff8801d4fa9ac0 RCX: ffffffff85ec9112 [ 34.208415] RDX: ffff8801ad6bf770 RSI: ffff8801d4fa9ac0 RDI: ffff8801d8360cc0 [ 34.215662] RBP: ffff8801ad6bf5c0 R08: ffff8801aa748140 R09: ffffed003b5c46d6 [ 34.222907] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: ffff8801ad6bf770 [ 34.230155] R13: ffff8801d8360cc0 R14: ffffffff8818a920 R15: ffff8801cfe47600 [ 34.237666] FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:0000000009a0c900 [ 34.245866] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 34.251726] CR2: ffffffffffffffd6 CR3: 00000001d7566000 CR4: 00000000001406f0 [ 34.258978] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.266224] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.273467] Call Trace: [ 34.276040] ? sock_poll+0x2e1/0x490 [ 34.279737] ? kernel_sendpage_locked+0x120/0x120 [ 34.284570] ? __lock_is_held+0xb5/0x140 [ 34.288611] ? kernel_sendpage_locked+0x120/0x120 [ 34.293442] ep_item_poll.isra.14+0x15c/0x400 [ 34.297925] ? ep_eventpoll_poll+0x200/0x200 [ 34.302315] ep_insert+0x6c1/0x1c20 [ 34.305922] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 34.311092] ? ep_send_events_proc+0xf00/0xf00 [ 34.315659] ? lock_release+0xa30/0xa30 [ 34.319619] ? check_same_owner+0x340/0x340 [ 34.323919] ? clear_tfile_check_list+0x3a0/0x3a0 [ 34.328742] ? rcu_note_context_switch+0x730/0x730 [ 34.333654] ? kasan_check_write+0x14/0x20 [ 34.337872] ? __mutex_lock+0x7e8/0x1820 [ 34.341929] ? __ia32_sys_epoll_ctl+0x7ea/0x10a0 [ 34.346667] ? do_futex+0x249/0x27d0 [ 34.350357] ? do_huge_pmd_anonymous_page+0x519/0x1b60 [ 34.355619] ? mutex_trylock+0x2b0/0x2b0 [ 34.359668] ? __thp_get_unmapped_area+0x180/0x180 [ 34.364585] ? exit_robust_list+0x290/0x290 [ 34.368886] ? lockdep_init_map+0x9/0x10 [ 34.372931] ? debug_mutex_init+0x2d/0x60 [ 34.377066] ? __mutex_init+0x1f7/0x290 [ 34.381031] ? graph_lock+0x170/0x170 [ 34.384820] ? pud_val+0x88/0x100 [ 34.388249] ? pmd_val+0x100/0x100 [ 34.391769] ? find_held_lock+0x36/0x1c0 [ 34.395817] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.401332] ? __fget_light+0x2f7/0x440 [ 34.405289] ? fget_raw+0x20/0x20 [ 34.408731] __ia32_sys_epoll_ctl+0xf00/0x10a0 [ 34.413294] ? __x64_sys_epoll_ctl+0x10a0/0x10a0 [ 34.418039] ? __ia32_compat_sys_futex+0x3e6/0x5f0 [ 34.422951] ? __x32_compat_sys_get_robust_list+0x430/0x430 [ 34.428642] ? mm_fault_error+0x380/0x380 [ 34.432770] ? do_fast_syscall_32+0x150/0xfb2 [ 34.437248] do_fast_syscall_32+0x34d/0xfb2 [ 34.441548] ? do_int80_syscall_32+0x890/0x890 [ 34.446109] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 34.450847] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.456371] ? syscall_return_slowpath+0x31d/0x5e0 [ 34.461287] ? sysret32_from_system_call+0x5/0x46 [ 34.466115] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.470937] entry_SYSENTER_compat+0x70/0x7f [ 34.475321] RIP: 0023:0xf7f03cb9 [ 34.478667] Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 34.497786] RSP: 002b:00000000ffd82ebc EFLAGS: 00000286 ORIG_RAX: 00000000000000ff [ 34.505474] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000001 [ 34.512721] RDX: 0000000000000003 RSI: 0000000020000080 RDI: 0000000000000000 [ 34.519967] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 34.527222] R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 [ 34.534478] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 34.541729] Modules linked in: [ 34.544902] Dumping ftrace buffer: [ 34.548415] (ftrace buffer empty) [ 34.552102] CR2: 0000000000000000 [ 34.555621] ---[ end trace fbc5fd93adca504c ]--- [ 34.560393] RIP: 0010: (null) [ 34.564290] Code: Bad RIP value. [ 34.567669] RSP: 0018:ffff8801ad6bf518 EFLAGS: 00010246 [ 34.573042] RAX: 0000000000000000 RBX: ffff8801d4fa9ac0 RCX: ffffffff85ec9112 [ 34.580320] RDX: ffff8801ad6bf770 RSI: ffff8801d4fa9ac0 RDI: ffff8801d8360cc0 [ 34.587594] RBP: ffff8801ad6bf5c0 R08: ffff8801aa748140 R09: ffffed003b5c46d6 [ 34.594879] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: ffff8801ad6bf770 [ 34.602157] R13: ffff8801d8360cc0 R14: ffffffff8818a920 R15: ffff8801cfe47600 [ 34.609432] FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:0000000009a0c900 [ 34.617667] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 34.623556] CR2: ffffffffffffffd6 CR3: 00000001d7566000 CR4: 00000000001406f0 [ 34.630843] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.638127] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.645407] Kernel panic - not syncing: Fatal exception [ 34.651415] Dumping ftrace buffer: [ 34.654936] (ftrace buffer empty) [ 34.658632] Kernel Offset: disabled [ 34.662237] Rebooting in 86400 seconds..