I'm having the problem that everytime I try to use my Ethernet via Thunderbolt to Ethernet Adapter, OS X 10.11 runs into a kernel panic. This is reproducibale. Using WLAN on the other hand works flawlessly.
Console says: m_free: freeing an already freed mbuf"@/Library/Caches/com.apple.xbs/Sources/xnu/xnu-3247.1.6.2.2/bsd/kern/uipc_mbuf.c
Anyone else seeing this problem? Or any suggestions on how to avoid it?