From: Wichert Akkerman <wichert@wiggy.net>
To: linux-kernel@vger.kernel.org
Subject: sys_gettimeofday racy or not?
Date: Fri, 25 Jun 2004 02:20:57 +0200 [thread overview]
Message-ID: <20040625002057.GA3052@wiggy.net> (raw)
This just happened to catch my eye and it's probably perfectly
valid, but if so please educate me on why it is. In kernel/time.c
sys_gettimeofday() there is this code:
if (unlikely(tz != NULL)) {
if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
return -EFAULT;
}
what prevents sys_tz from being changed while this code runs?
Wichert.
--
Wichert Akkerman <wichert@wiggy.net> It is simple to make things.
http://www.wiggy.net/ It is hard to make things simple.
next reply other threads:[~2004-06-25 0:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-25 0:20 Wichert Akkerman [this message]
2004-06-25 4:53 ` sys_gettimeofday racy or not? Chris Friesen
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