[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.753614] 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: [ 21.580774] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.823270] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.649491] random: sshd: uninitialized urandom read (32 bytes read, 88 bits of entropy available) [ 39.047257] random: sshd: uninitialized urandom read (32 bytes read, 100 bits of entropy available) Warning: Permanently added '10.128.15.218' (ECDSA) to the list of known hosts. [ 44.395977] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available) net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 44.506943] IPVS: Creating netns size=2552 id=1 net.ipv6.conf.syz2.accept_dad = 0 [ 44.554182] IPVS: Creating netns size=2552 id=2 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz6.accept_dad = 0 [ 44.588892] IPVS: Creating netns size=2552 id=3 net.ipv6.conf.syz6.router_solicitations = 0 [ 44.632033] IPVS: Creating netns size=2552 id=4 RTNETLINK answers: Operation not supported net.ipv6.conf.syz4.accept_dad = 0 RTNETLINK answers: Operation not supported net.ipv6.conf.syz4.router_solicitations = 0 [ 44.682641] IPVS: Creating netns size=2552 id=5 RTNETLINK answers: Operation not supported net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz1.router_solicitations = 0 [ 44.742633] IPVS: Creating netns size=2552 id=6 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz7.router_solicitations = 0 RTNETLINK answers: Operation not supported [ 44.816050] IPVS: Creating netns size=2552 id=7 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported net.ipv6.conf.syz3.accept_dad = 0 RTNETLINK answers: Operation not supported net.ipv6.conf.syz3.router_solicitations = 0 [ 44.894897] IPVS: Creating netns size=2552 id=8 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported net.ipv6.conf.syz5.accept_dad = 0 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported net.ipv6.conf.syz5.router_solicitations = 0 RTNETLINK answers: Operation not supported Cannot find device "bridge0" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "bridge0" RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "bridge0" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "vcan0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "gre0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "bridge0" Cannot find device "gre0" Cannot find device "vcan0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "bridge0" Cannot find device "bridge0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "gre0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "gretap0" Cannot find device "vcan0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "gretap0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "vcan0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "vcan0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "vcan0" Cannot find device "gre0" Cannot find device "vcan0" Cannot find device "gre0" Cannot find device "ip_vti0" RTNETLINK answers: Operation not supported Cannot find device "gretap0" Cannot find device "gre0" Cannot find device "vcan0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "gretap0" Cannot find device "gretap0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "ip_vti0" RTNETLINK answers: Operation not supported Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gre0" Cannot find device "ip_vti0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip6_vti0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gre0" Cannot find device "ip_vti0" Cannot find device "gretap0" Cannot find device "ip6_vti0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "gre0" Cannot find device "ip_vti0" Cannot find device "gretap0" Cannot find device "gre0" Cannot find device "ip6_vti0" Cannot find device "ip_vti0" Cannot find device "gre0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "gretap0" Cannot find device "gre0" Cannot find device "ip6_vti0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip6tnl0" Cannot find device "ip_vti0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "gretap0" Cannot find device "ip6_vti0" Cannot find device "ip_vti0" Cannot find device "gretap0" Cannot find device "ip6tnl0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip_vti0" Cannot find device "ip6tnl0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "gretap0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip_vti0" Cannot find device "ip6tnl0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip6gre0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6gre0" Cannot find device "ip6tnl0" Cannot find device "ip6_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6_vti0" Cannot find device "ip_vti0" Cannot find device "ip6gre0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6_vti0" Cannot find device "ip6gre0" Cannot find device "ip_vti0" Cannot find device "ip6tnl0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gretap0" Cannot find device "ip6tnl0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6_vti0" Cannot find device "ip6gretap0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6_vti0" Cannot find device "ip6gre0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6_vti0" Cannot find device "ip6gre0" Cannot find device "ip6tnl0" Cannot find device "ip6gretap0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6_vti0" Cannot find device "ip6gre0" Cannot find device "ip6_vti0" Cannot find device "erspan0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6tnl0" Cannot find device "ip6gretap0" Cannot find device "ip6tnl0" Cannot find device "erspan0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6tnl0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gre0" Cannot find device "ip6tnl0" Cannot find device "erspan0" Cannot find device "ip6gretap0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gretap0" Cannot find device "ip6gre0" Cannot find device "erspan0" Cannot find device "ip6gre0" Cannot find device "ip6tnl0" executing program Cannot find device "ip6tnl0" Cannot find device "ip6gretap0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" executing program Cannot find device "ip6gretap0" Cannot find device "ip6tnl0" Cannot find device "ip6gretap0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" executing program Cannot find device "erspan0" Cannot find device "ip6gretap0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" executing program Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "erspan0" Cannot find device "erspan0" executing program Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" executing program Cannot find device "ip6gre0" Cannot find device "erspan0" Cannot find device "ip6gre0" Cannot find device "erspan0" executing program Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" executing program Cannot find device "ip6gre0" Cannot find device "erspan0" Cannot find device "erspan0" executing program Cannot find device "ip6gretap0" Cannot find device "ip6gre0" Cannot find device "erspan0" executing program Cannot find device "erspan0" executing program Cannot find device "ip6gretap0" Cannot find device "erspan0" executing program executing program Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" executing program executing program Cannot find device "erspan0" Cannot find device "ip6gretap0" executing program Cannot find device "ip6gretap0" Cannot find device "erspan0" [ 48.424662] ------------[ cut here ]------------ [ 48.429487] WARNING: CPU: 0 PID: 4968 at include/net/sock.h:628 udp_lib_unhash+0x545/0x6a0() [ 48.438197] Kernel panic - not syncing: panic_on_warn set ... [ 48.438197] [ 48.445563] CPU: 0 PID: 4968 Comm: syzkaller742045 Not tainted 4.4.112-g3fc4284 #32 [ 48.453345] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.462694] 0000000000000000 803ff35879798751 ffff8800b1b2fa30 ffffffff81d054ed Cannot find device "ip6gretap0" Cannot find device "erspan0" [ 48.470728] ffffffff83843200 ffff8800b1b2fb08 ffffffff83cf1d40 0000000000000009 [ 48.478760] 0000000000000274 ffff8800b1b2faf8 ffffffff81419dca 0000000041b58ab3 [ 48.486782] Call Trace: [ 48.489366] [] dump_stack+0xc1/0x124 [ 48.494727] [] panic+0x1aa/0x388 [ 48.499739] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 48.506658] [] ? pm_qos_get_value.part.4+0xb/0xb [ 48.513057] [] ? warn_slowpath_common+0x10a/0x140 Cannot find device "erspan0" executing program Cannot find device "ip6gretap0" [ 48.519545] [] warn_slowpath_common+0x125/0x140 [ 48.525859] [] ? udp_lib_unhash+0x545/0x6a0 [ 48.531826] [] warn_slowpath_null+0x29/0x30 [ 48.537794] [] udp_lib_unhash+0x545/0x6a0 [ 48.543601] [] ? udp_setsockopt+0x80/0x80 [ 48.549397] [] ? sock_release+0x1e0/0x1e0 [ 48.555187] [] sk_common_release+0xbd/0x300 [ 48.561153] [] udp_lib_close+0x15/0x20 [ 48.566686] [] inet_release+0xfa/0x1d0 Cannot find device "erspan0" [ 48.572214] [] sock_release+0x8d/0x1e0 [ 48.577744] [] sock_close+0x16/0x20 [ 48.583008] [] __fput+0x233/0x6d0 [ 48.588100] [] ____fput+0x15/0x20 [ 48.593196] [] task_work_run+0x104/0x180 [ 48.598896] [] do_exit+0x871/0x2a20 [ 48.604166] [] ? release_task+0x1240/0x1240 [ 48.610129] [] ? vfs_writev+0x83/0xb0 [ 48.615571] [] ? SyS_writev+0x17d/0x240 [ 48.621188] [] do_group_exit+0x108/0x320 [ 48.626893] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 48.633384] [] SyS_exit_group+0x1d/0x20 [ 48.639003] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 48.646141] Dumping ftrace buffer: [ 48.649711] (ftrace buffer empty) [ 48.653388] Kernel Offset: disabled [ 48.656998] Rebooting in 86400 seconds..