Module Name: src
Committed By: maxv
Date: Sun Dec 31 06:57:12 UTC 2017
Modified Files:
src/sys/kern: uipc_mbuf.c
Log Message:
Check MT_FREE by default, and not just under DEBUG (or DIAGNOSTIC). This
code is fast, with an nonexistent overhead - and we already take care of
setting MT_FREE, so why not check it.
In addition, stop registering the function name, that's not helpful since
the MBUFFREE macro is local. Instead, set m_data to NULL, so that any
access to a freed mbuf's data after mtod() or similar will page fault.
The combination of these two changes provides a fast and efficient way of
detecting use-after-frees in the network stack.
To generate a diff of this commit:
cvs rdiff -u -r1.173 -r1.174 src/sys/kern/uipc_mbuf.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
