tree 0d289c7feec4e7b3b19c7c312e8cb31532c5b9c9
parent f745bb1c73e2395e6b9961d4d915a8f8e2cd32cd
author Matt Mackall <mpm@selenic.com> 1184869814 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1184880064 -0700

random: fix bound check ordering (CVE-2007-3105)

If root raised the default wakeup threshold over the size of the
output pool, the pool transfer function could overflow the stack with
RNG bytes, causing a DoS or potential privilege escalation.

(Bug reported by the PaX Team <pageexec@freemail.hu>)

Cc: Theodore Tso <tytso@mit.edu>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>