CVS commit: src/sys/kern

["Christos Zoulas" <christos%netbsd.org@localhost>]

Module Name:    src
Committed By:   christos
Date:           Thu Sep 29 21:46:32 UTC 2016

Modified Files:
        src/sys/kern: tty.c

Log Message:
Only allow root to use TIOCSTI. Don't eat the kauth error number.
It is unexpected for an unprivileged process to gain privs by
typing to root's tty:

$ cat installer
#!/bin/sh
whoami
/usr/sbin/sti /dev/tty whoami\\n

$ su unprivileged -c ./installer
unprivileged
$ whoami
root


To generate a diff of this commit:
cvs rdiff -u -r1.271 -r1.272 src/sys/kern/tty.c

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