INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added 'ci-upstream-kasan-gce-386-4,10.128.0.49' (ECDSA) to the list of known hosts.
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
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
syzkaller login: [   44.061533] multiple allocations for the same socket
[   44.061636] ------------[ cut here ]------------
[   44.063072] WARNING: CPU: 0 PID: 3282 at net/core/sock_reuseport.c:41 reuseport_alloc+0x306/0x3b0
[   44.064432] Kernel panic - not syncing: panic_on_warn set ...
[   44.064432] 
[   44.065426] CPU: 0 PID: 3282 Comm: syzkaller241034 Not tainted 4.14.0-rc5+ #49
[   44.066402] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.067638] Call Trace:
[   44.068001]  dump_stack+0x194/0x257
[   44.068492]  ? arch_local_irq_restore+0x53/0x53
[   44.069127]  panic+0x1e4/0x417
[   44.069560]  ? __warn+0x1d9/0x1d9
[   44.070026]  ? show_regs_print_info+0x65/0x65
[   44.070640]  ? reuseport_alloc+0x306/0x3b0
[   44.071206]  __warn+0x1c4/0x1d9
[   44.071650]  ? reuseport_alloc+0x306/0x3b0
[   44.072222]  report_bug+0x211/0x2d0
[   44.072719]  fixup_bug+0x40/0x90
[   44.073178]  do_trap+0x260/0x390
[   44.073642]  do_error_trap+0x120/0x390
[   44.074161]  ? vprintk_emit+0x49b/0x590
[   44.074697]  ? do_trap+0x390/0x390
[   44.075179]  ? reuseport_alloc+0x306/0x3b0
[   44.075748]  ? vprintk_emit+0x3ea/0x590
[   44.076288]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   44.076938]  do_invalid_op+0x1b/0x20
[   44.077439]  invalid_op+0x18/0x20
[   44.077904] RIP: 0010:reuseport_alloc+0x306/0x3b0
[   44.078562] RSP: 0018:ffff8801d278f838 EFLAGS: 00010282
[   44.079272] RAX: 0000000000000028 RBX: ffff8801d2351500 RCX: 0000000000000000
[   44.080226] RDX: 0000000000000028 RSI: 1ffff1003a4f1ec7 RDI: ffffed003a4f1efb
[   44.081181] RBP: ffff8801d278f908 R08: 0000000000000001 R09: 0000000000000000
[   44.082135] R10: ffff8801d278f6f0 R11: 0000000000000000 R12: 1ffff1003a4f1f08
[   44.089372] R13: ffff8801d2351500 R14: ffff8801d278f8e0 R15: ffff8801d2351938
[   44.096628]  ? reuseport_alloc+0x306/0x3b0
[   44.100829]  ? reuseport_select_sock+0xb60/0xb60
[   44.105557]  ? xdp_do_generic_redirect+0x1110/0x1110
[   44.110632]  __reuseport_attach_prog+0x208/0x280
[   44.115357]  ? bpf_prog_destroy+0x20/0x20
[   44.119467]  ? bpf_prog_store_orig_filter.isra.41+0x147/0x1f0
[   44.125969]  ? _copy_from_user+0x99/0x110
[   44.130088]  ? __get_filter+0xb7/0x220
[   44.134553]  sk_reuseport_attach_filter+0x38/0x80
[   44.139364]  sock_setsockopt+0x164d/0x1ad0
[   44.143569]  ? sock_enable_timestamp+0xb0/0xb0
[   44.148119]  ? lock_release+0xa40/0xa40
[   44.152058]  ? check_same_owner+0x320/0x320
[   44.156344]  ? lock_downgrade+0x990/0x990
[   44.160466]  ? __might_sleep+0x95/0x190
[   44.164414]  ? kasan_check_read+0x11/0x20
[   44.168525]  ? _copy_to_user+0xa2/0xc0
[   44.172390]  ? get_compat_bpf_fprog+0x179/0x210
[   44.177027]  ? gro_cells_destroy+0x340/0x340
[   44.181403]  ? selinux_tun_dev_create+0xc0/0xc0
[   44.186039]  ? selinux_netlbl_socket_setsockopt+0x10c/0x460
[   44.191714]  ? selinux_netlbl_sock_rcv_skb+0x730/0x730
[   44.196962]  compat_sock_setsockopt.constprop.6+0xae/0x3c0
[   44.202554]  ? compat_sock_getsockopt.constprop.4+0x440/0x440
[   44.208407]  ? selinux_socket_setsockopt+0x64/0x80
[   44.213304]  ? security_socket_setsockopt+0x89/0xb0
[   44.218290]  compat_SyS_setsockopt+0x34a/0x410
[   44.222836]  ? __do_page_fault+0x3d6/0xd60
[   44.227039]  ? scm_detach_fds_compat+0x3c0/0x3c0
[   44.231761]  ? do_fast_syscall_32+0x158/0xf05
[   44.236224]  ? scm_detach_fds_compat+0x3c0/0x3c0
[   44.240945]  do_fast_syscall_32+0x3f2/0xf05
[   44.245236]  ? do_int80_syscall_32+0x940/0x940
[   44.249790]  ? syscall_return_slowpath+0x2b3/0x510
[   44.254685]  ? finish_task_switch+0x4cc/0x740
[   44.259145]  ? prepare_exit_to_usermode+0x2d0/0x2d0
[   44.264127]  ? retint_user+0x18/0x20
[   44.267810]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   44.272624]  entry_SYSENTER_compat+0x51/0x60
[   44.276996] RIP: 0023:0xf7f72c79
[   44.280325] RSP: 002b:00000000f47671ec EFLAGS: 00000296 ORIG_RAX: 000000000000016e
[   44.288000] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000001
[   44.295235] RDX: 0000000000000033 RSI: 0000000020e9bff0 RDI: 0000000000000010
[   44.302469] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   44.309705] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   44.316943] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   44.324646] Dumping ftrace buffer:
[   44.328195]    (ftrace buffer empty)
[   44.331872] Kernel Offset: disabled
[   44.335470] Rebooting in 86400 seconds..