------------[ cut here ]------------
WARNING: CPU: 0 PID: 3282 at net/core/sock_reuseport.c:41 reuseport_alloc+0x306/0x3b0 net/core/sock_reuseport.c:39
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3282 Comm: syzkaller241034 Not tainted 4.14.0-rc5+ #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:181
 __warn+0x1c4/0x1d9 kernel/panic.c:542
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:reuseport_alloc+0x306/0x3b0 net/core/sock_reuseport.c:39
RSP: 0018:ffff8801d278f838 EFLAGS: 00010282
RAX: 0000000000000028 RBX: ffff8801d2351500 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 1ffff1003a4f1ec7 RDI: ffffed003a4f1efb
RBP: ffff8801d278f908 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8801d278f6f0 R11: 0000000000000000 R12: 1ffff1003a4f1f08
R13: ffff8801d2351500 R14: ffff8801d278f8e0 R15: ffff8801d2351938
 __reuseport_attach_prog+0x208/0x280 net/core/filter.c:1250
 sk_reuseport_attach_filter+0x38/0x80 net/core/filter.c:1338
 sock_setsockopt+0x164d/0x1ad0 net/core/sock.c:952
 compat_sock_setsockopt.constprop.6+0xae/0x3c0 net/compat.c:383
 C_SYSC_setsockopt net/compat.c:400 [inline]
 compat_SyS_setsockopt+0x34a/0x410 net/compat.c:386
 do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline]
 do_fast_syscall_32+0x3f2/0xf05 arch/x86/entry/common.c:391
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
RIP: 0023:0xf7f72c79
RSP: 002b:00000000f47671ec EFLAGS: 00000296 ORIG_RAX: 000000000000016e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000001
RDX: 0000000000000033 RSI: 0000000020e9bff0 RDI: 0000000000000010
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..