panic: Data modified on freelist: word 4 of object 0xffff8000014b3400 size 0x10c previous type free (0x6563 != 0xdeaf4152)

Starting stack trace...
panic(ffffffff83312383) at panic+0x1ba sys/kern/subr_prf.c:229
malloc(10c,7f,1) at malloc+0xcf8 sys/kern/kern_malloc.c:353
ktrgenio(ffff80002a7e2a70,3,0,ffff8000014d5dd0,104) at ktrgenio+0x141 sys/kern/kern_ktrace.c:249
dofilereadv(ffff80002a7e2a70,3,ffff80002a8091f8,0,ffff80002a8092a0) at dofilereadv+0x471 sys/kern/sys_generic.c:268
sys_read(ffff80002a7e2a70,ffff80002a809350,ffff80002a8092a0) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a809350) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a809350) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ab5983c9c50, count: 250
End of stack trace.

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