CVE-2010-3086 kernel panic via futex

[Eugene Teo <eugene () redhat com>]

Discovered by Tavis Ormandy, the exception fixup code for the 
__futex_atomic_op1, __futex_atomic_op2, and 
futex_atomic_cmpxchg-_inatomic() macros replaced the LOCK prefix with a 
NOP instruction. This can cause the exceptions to not match the 
exception table fault fixup. A local, unprivileged user could use this 
flaw to cause a denial of service. This is assigned with CVE-2010-3086.

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-3086
http://git.kernel.org/linus/9d55b9923a1b7ea8193b8875c57ec940dc2ff027

Thanks, Eugene
--
main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }