CVS commit: src/sys/kern

["Juergen Hannken-Illjes" <hannken%netbsd.org@localhost>]

Module Name:    src
Committed By:   hannken
Date:           Wed Jan 17 10:18:41 UTC 2024

Modified Files:
        src/sys/kern: init_main.c kern_hook.c

Log Message:
Protect kernel hooks exechook, exithook and forkhook with rwlock.
Lock as writer on establish/disestablish and as reader on list traverse.

For exechook ride "exec_lock" as it is already take as reader when
traversing the list.  Add local locks for exithook and forkhook.

Move exec_init before signal_init as signal_init calls exechook_establish()
that needs "exec_lock".

PR kern/39913 "exec, fork, exit hooks need locking"


To generate a diff of this commit:
cvs rdiff -u -r1.546 -r1.547 src/sys/kern/init_main.c
cvs rdiff -u -r1.14 -r1.15 src/sys/kern/kern_hook.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.