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author Chris Snook <csnook@redhat.com> 1178609055 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1178648099 -0700

use use SEEK_MAX to validate user lseek arguments

Add SEEK_MAX and use it to validate lseek arguments from userspace.

Signed-off-by: Chris Snook <csnook@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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