tree 7e9b3cd8a5c5b10d6ee32dc8b85c5d5211fd5eeb
parent 91d80a84bbc8f28375cca7e65ec666577b4209ad
author Jiri Slaby <jslaby@suse.cz> 1366976933 +0200
committer Linus Torvalds <torvalds@linux-foundation.org> 1366988363 -0700

TTY: fix atime/mtime regression

In commit b0de59b5733d ("TTY: do not update atime/mtime on read/write")
we removed timestamps from tty inodes to fix a security issue and waited
if something breaks.  Well, 'w', the utility to find out logged users
and their inactivity time broke.  It shows that users are inactive since
the time they logged in.

To revert to the old behaviour while still preventing attackers to
guess the password length, we update the timestamps in one-minute
intervals by this patch.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>