Dpanic: Data modified on freelist: word 4 of object 0xffff80000158c000 size 0x2000 previous type free (0x0 != 0xdeadbeef)

Starting stack trace...
panic(ffffffff833355f7) at panic+0x1ba sys/kern/subr_prf.c:229
malloc(2000,b,9) at malloc+0xdb6 sys/kern/kern_malloc.c:355
tcp_sysctl(ffff80003c96138c,1,200000000400,ffff80003c9613b8,0,9c) at tcp_sysctl+0x718 sys/netinet/tcp_usrreq.c:1437
net_sysctl(ffff80003c961384,3,200000000400,ffff80003c9613b8,0,9c,2404b7ef327bf71e) at net_sysctl+0x64e sys/kern/uipc_domain.c:260
sys_sysctl(ffff80002f4f22d8,ffff80003c9614e0,ffff80003c961430) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80003c9614e0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c9614e0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xef7324a6df0, count: 250
End of stack trace.
ata modified on syncing disks...freelist: word -35183595924302 of object 0xffff80000158c000 size 0x2000 previous type free (invalid addr 0x494d8efe43e079e2)