CVSROOT: /cvs
Module name: src
Changes by: bl...@cvs.openbsd.org 2022/01/18 05:38:21
Modified files:
sys/kern : uipc_mbuf.c
Log message:
Properly handle read-only clusters in m_pullup(9).
If the first mbuf of a chain in m_pullup is a cluster, check if the
cluster is read-only (shared or an external buffer). If so, don't
touch it and create a new mbuf for the pullup data.
This restores original 4.4BSD m_pullup, that not only returned
contiguous mbuf data of the specified length, but also converted
read-only clusters into writeable memory. The latter feature was
lost during some refactoring.
from ehrhardt@; tested by weerd@; OK stsp@ bluhm@ claudio@
