[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.674500] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.581318] random: sshd: uninitialized urandom read (32 bytes read) [ 19.938619] random: sshd: uninitialized urandom read (32 bytes read) [ 20.665714] random: sshd: uninitialized urandom read (32 bytes read) [ 20.807414] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.5' (ECDSA) to the list of known hosts. [ 26.254186] random: sshd: uninitialized urandom read (32 bytes read) net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 26.352399] IPVS: ftp: loaded support on port[0] = 21 [ 26.503510] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.509895] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.516901] device bridge_slave_0 entered promiscuous mode [ 26.529963] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.536351] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.543311] device bridge_slave_1 entered promiscuous mode [ 26.556597] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 26.570292] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 26.603309] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 26.618470] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 26.666318] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 26.673402] team0: Port device team_slave_0 added [ 26.685631] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 26.692671] team0: Port device team_slave_1 added [ 26.705319] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 26.720305] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 26.735150] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 26.751508] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 26.841357] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.847737] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.854363] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.860716] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 27.172790] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 27.178892] 8021q: adding VLAN 0 to HW filter on device bond0 [ 27.213397] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 27.247597] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.254862] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 27.284185] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 27.290291] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 27.463249] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 27.615738] ------------[ cut here ]------------ [ 27.620538] do_IRQ(): syz-executor429 has overflown the kernel stack (cur:ffff8801a9110000,sp:ffff88019e1f8c10,irq stk top-bottom:ffff8801daf00080-ffff8801daf08000,exception stk top-bottom:fffffe0000038080-fffffe0000042000,ip:lock_release+0x4dc/0xa30) [ 27.642929] WARNING: CPU: 1 PID: 4721 at arch/x86/kernel/irq_64.c:63 handle_irq+0x1fb/0x2e7 [ 27.651395] Kernel panic - not syncing: panic_on_warn set ... [ 27.651395] [ 27.658751] CPU: 1 PID: 4721 Comm: syz-executor429 Not tainted 4.18.0-rc3-next-20180706+ #1 [ 27.667217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.676557] Call Trace: [ 27.679122] [ 27.681256] dump_stack+0x1c9/0x2b4 [ 27.684867] ? dump_stack_print_info.cold.2+0x52/0x52 [ 27.690042] panic+0x238/0x4e7 [ 27.693216] ? add_taint.cold.5+0x16/0x16 [ 27.697346] ? __warn.cold.8+0x148/0x1ba [ 27.701391] ? __warn.cold.8+0x117/0x1ba [ 27.705431] ? handle_irq+0x1fb/0x2e7 [ 27.709212] __warn.cold.8+0x163/0x1ba [ 27.713088] ? handle_irq+0x1fb/0x2e7 [ 27.716884] report_bug+0x252/0x2d0 [ 27.720489] do_error_trap+0x1fc/0x4d0 [ 27.724354] ? rcu_idle_enter+0x480/0x480 [ 27.728480] ? math_error+0x3e0/0x3e0 [ 27.732261] ? vprintk_default+0x28/0x30 [ 27.736301] ? vprintk_func+0x81/0xe7 [ 27.740079] ? printk+0xa7/0xcf [ 27.743343] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.748165] do_invalid_op+0x1b/0x20 [ 27.751865] invalid_op+0x14/0x20 [ 27.755305] RIP: 0010:handle_irq+0x1fb/0x2e7 [ 27.759684] Code: 00 00 ff b6 80 00 00 00 48 c7 c7 40 bc e4 87 41 54 41 55 65 48 8b 04 25 40 ee 01 00 48 05 68 06 00 00 48 89 c6 e8 25 c0 1c 00 <0f> 0b 48 83 c4 18 e9 3f ff ff ff 48 89 75 e0 e8 11 64 90 00 48 8b [ 27.778804] RSP: 0018:ffff8801daf07f58 EFLAGS: 00010082 [ 27.784146] RAX: 0000000000000000 RBX: ffff8801ce22c480 RCX: 0000000000000000 [ 27.791394] RDX: 0000000000010000 RSI: ffffffff81634381 RDI: 0000000000000001 [ 27.798660] RBP: ffff8801daf07fb0 R08: ffff8801d33584c0 R09: ffffed003b5e3ec2 [ 27.805909] R10: ffffed003b5e3ec2 R11: ffff8801daf1f617 R12: fffffe0000042000 [ 27.813158] R13: fffffe0000038080 R14: 0000000000000027 R15: 0000000000000000 [ 27.820417] ? vprintk_func+0x81/0xe7 [ 27.824201] ? handle_irq+0x1fb/0x2e7 [ 27.827982] ? lock_release+0x4dc/0xa30 [ 27.831939] ? rcu_irq_enter+0xd8/0x110 [ 27.835905] do_IRQ+0x78/0x190 [ 27.839091] common_interrupt+0xf/0xf [ 27.842876] [ 27.845797] Dumping ftrace buffer: [ 27.849325] (ftrace buffer empty) [ 27.853012] Kernel Offset: disabled [ 27.856615] Rebooting in 86400 seconds..