55faae77fa
Analogously to r291040, in6_mc_get recurses on if_addr_lock if the M_NOWAIT allocation fails. The fix is the same. Suggested by: Andrey V. Elsukov Reviewed by: jhb (ip4 version) Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D4138 (ip4 version)