panic: if_clone_free_unit: bit is already cleared
cpuid = 5
Trace beginning at frame 0xfffff80117f37768
if_clone_free_unit.isra.1() at if_clone_free_unit.isra.1+0x49 0xffffffff80733f29 
if_clone_free_unit.isra.1() at if_clone_free_unit.isra.1+0x49 0xffffffff80733f29 
if_clone_destroy() at if_clone_destroy+0x7c 0xffffffff807341fc 
ifioctl() at ifioctl+0x243 0xffffffff80731d73 
mapped_ioctl() at mapped_ioctl+0x5fa 0xffffffff806a831a 
syscall2() at syscall2+0x11e 0xffffffff80bd6a0e 
Debugger("panic")