[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 80.077246] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 294.708546] random: sshd: uninitialized urandom read (32 bytes read) [ 295.255419] random: sshd: uninitialized urandom read (32 bytes read) [ 295.620217] random: sshd: uninitialized urandom read (32 bytes read) [ 295.764589] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.198' (ECDSA) to the list of known hosts. [ 301.255403] random: sshd: uninitialized urandom read (32 bytes read) [ 301.367719] IPVS: ftp: loaded support on port[0] = 21 [ 301.503290] bridge0: port 1(bridge_slave_0) entered blocking state [ 301.509782] bridge0: port 1(bridge_slave_0) entered disabled state [ 301.521776] device bridge_slave_0 entered promiscuous mode [ 301.539400] bridge0: port 2(bridge_slave_1) entered blocking state [ 301.545837] bridge0: port 2(bridge_slave_1) entered disabled state [ 301.552906] device bridge_slave_1 entered promiscuous mode [ 301.568789] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 301.585086] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 301.631358] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 301.649870] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 301.713966] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 301.721614] team0: Port device team_slave_0 added [ 301.737542] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 301.744657] team0: Port device team_slave_1 added [ 301.760755] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 301.777454] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 301.795534] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 301.812627] 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 [ 301.937390] bridge0: port 2(bridge_slave_1) entered blocking state [ 301.943861] bridge0: port 2(bridge_slave_1) entered forwarding state [ 301.950814] bridge0: port 1(bridge_slave_0) entered blocking state [ 301.957201] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 302.375203] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 302.381316] 8021q: adding VLAN 0 to HW filter on device bond0 [ 302.424223] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 302.468374] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 302.476767] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 302.515899] 8021q: adding VLAN 0 to HW filter on device team0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 303.633840] dst_release: dst:(____ptrval____) refcnt:-1 [ 303.644863] WARNING: CPU: 0 PID: 4713 at include/net/dst.h:239 ip6_sk_dst_lookup_flow+0x8cc/0xac0 [ 303.653913] Kernel panic - not syncing: panic_on_warn set ... [ 303.653913] [ 303.662925] CPU: 0 PID: 4713 Comm: syz-executor473 Not tainted 4.18.0-rc7+ #39 [ 303.670288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 303.679709] Call Trace: [ 303.682345] dump_stack+0x1c9/0x2b4 [ 303.685981] ? dump_stack_print_info.cold.2+0x52/0x52 [ 303.691187] panic+0x238/0x4e7 [ 303.694386] ? add_taint.cold.5+0x16/0x16 [ 303.698544] ? __warn.cold.8+0x148/0x1ba [ 303.702619] ? __warn.cold.8+0x117/0x1ba [ 303.706689] ? ip6_sk_dst_lookup_flow+0x8cc/0xac0 [ 303.711528] __warn.cold.8+0x163/0x1ba [ 303.715404] ? ip6_sk_dst_lookup_flow+0x8cc/0xac0 [ 303.720231] report_bug+0x252/0x2d0 [ 303.723853] do_error_trap+0x1fc/0x4d0 [ 303.727732] ? lock_downgrade+0x8f0/0x8f0 [ 303.731865] ? math_error+0x3e0/0x3e0 [ 303.735648] ? rcu_is_watching+0x8c/0x150 [ 303.739777] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 303.744189] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 303.749032] do_invalid_op+0x1b/0x20 [ 303.752780] invalid_op+0x14/0x20 [ 303.756227] RIP: 0010:ip6_sk_dst_lookup_flow+0x8cc/0xac0 [ 303.761663] Code: ff 4c 89 ff e8 65 d7 0b fc e9 56 f9 ff ff e8 7b d7 0b fc e9 c1 f9 ff ff 4c 89 ef e8 6e d7 0b fc e9 2c fc ff ff e8 34 fb cd fb <0f> 0b e9 16 fe ff ff e8 78 d7 0b fc e9 04 f9 ff ff e8 4e 18 99 fb [ 303.781001] RSP: 0018:ffff8801cb2d73a0 EFLAGS: 00010293 [ 303.786353] RAX: ffff8801ca9624c0 RBX: ffff8801af63c000 RCX: ffffffff85ae1adf [ 303.793602] RDX: 0000000000000000 RSI: ffffffff85ae1cfc RDI: 0000000000000005 [ 303.800860] RBP: ffff8801cb2d7450 R08: ffff8801ca9624c0 R09: ffffed0035ec7808 [ 303.808111] R10: ffffed0035ec7808 R11: ffff8801af63c043 R12: ffff8801b94a1840 [ 303.815365] R13: ffff8801cb2d76a0 R14: 0000000000000000 R15: ffff8801af63c040 [ 303.822629] ? ip6_sk_dst_lookup_flow+0x6af/0xac0 [ 303.827456] ? ip6_sk_dst_lookup_flow+0x8cc/0xac0 [ 303.832287] ? ip6_dst_lookup_flow+0x270/0x270 [ 303.836941] udpv6_sendmsg+0x20f9/0x35f0 [ 303.841121] ? ip_reply_glue_bits+0xc0/0xc0 [ 303.845431] ? udpv6_queue_rcv_skb+0x1530/0x1530 [ 303.850191] ? graph_lock+0x170/0x170 [ 303.853982] ? find_held_lock+0x36/0x1c0 [ 303.858043] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 303.863568] ? rw_copy_check_uvector+0x30d/0x3e0 [ 303.868308] ? find_held_lock+0x36/0x1c0 [ 303.872356] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 303.877875] ? import_iovec+0x269/0x470 [ 303.881830] ? dup_iter+0x270/0x270 [ 303.885472] inet_sendmsg+0x1a1/0x690 [ 303.889258] ? udpv6_queue_rcv_skb+0x1530/0x1530 [ 303.894009] ? inet_sendmsg+0x1a1/0x690 [ 303.898012] ? copy_msghdr_from_user+0x3c4/0x580 [ 303.902758] ? ipip_gro_receive+0x100/0x100 [ 303.907065] ? move_addr_to_kernel.part.20+0x100/0x100 [ 303.912338] ? security_socket_sendmsg+0x94/0xc0 [ 303.917074] ? ipip_gro_receive+0x100/0x100 [ 303.921377] sock_sendmsg+0xd5/0x120 [ 303.925077] ___sys_sendmsg+0x51d/0x930 [ 303.929042] ? copy_msghdr_from_user+0x580/0x580 [ 303.933791] ? __lock_acquire+0x7fc/0x5020 [ 303.938016] ? __fget_light+0x2f7/0x440 [ 303.941978] ? fget_raw+0x20/0x20 [ 303.945433] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 303.950963] ? sockfd_lookup_light+0xc5/0x160 [ 303.955500] __sys_sendmmsg+0x240/0x6f0 [ 303.959464] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 303.963781] ? lock_downgrade+0x8f0/0x8f0 [ 303.967920] ? finish_task_switch+0x18a/0x870 [ 303.972401] ? kasan_check_read+0x11/0x20 [ 303.976529] ? do_raw_spin_unlock+0xa7/0x2f0 [ 303.980927] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 303.985506] __x64_sys_sendmmsg+0x9d/0x100 [ 303.989736] do_syscall_64+0x1b9/0x820 [ 303.993604] ? finish_task_switch+0x1d3/0x870 [ 303.998084] ? syscall_return_slowpath+0x5e0/0x5e0 [ 304.002996] ? syscall_return_slowpath+0x31d/0x5e0 [ 304.007915] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 304.013266] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 304.018094] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 304.023267] RIP: 0033:0x446a29 [ 304.026432] Code: e8 ac b8 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 304.045596] RSP: 002b:00007f49fb31adb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 304.053289] RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 0000000000446a29 [ 304.060557] RDX: 00000000000000b8 RSI: 0000000020001b00 RDI: 0000000000000003 [ 304.067810] RBP: 00000000006dcc30 R08: 00007f49fb31b700 R09: 0000000000000000 [ 304.075062] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc3c [ 304.082327] R13: 00007ffcff75db2f R14: 00007f49fb31b9c0 R15: 0000000000000001 [ 304.090257] Dumping ftrace buffer: [ 304.093891] (ftrace buffer empty) [ 304.097603] Kernel Offset: disabled [ 304.101216] Rebooting in 86400 seconds..