From: Amol Kumar Lad <amolk@ishoni.com>
To: linux-mm@kvack.org
Subject: copy_from_user
Date: 21 Dec 2002 18:26:30 -0500 [thread overview]
Message-ID: <1040513191.2250.79.camel@amol.in.ishoni.com> (raw)
Hi,
Suppose kernel tries to do copy_from_user from a pointer that does not
have any mapping. i.e. not in any VMA (and not in stack area too..).
Now (for 1386)
access_ok --> __range_ok
Suppose the 'from' ptr is within range then how kernel is making sure
that 'from' is invalid ??
The page fault handler will see that 'from' has no mapping and it will
die..
Please help
Amol
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next reply other threads:[~2002-12-21 12:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-21 23:26 Amol Kumar Lad [this message]
2002-12-23 1:21 ` copy_from_user Ravi
2002-12-23 15:02 ` copy_from_user Amol Kumar Lad
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