Linus Torvalds 6ff8315a4d nf_conntrack: avoid kernel pointer value leak in slab name
commit 31b0b385f69d8d5491a4bca288e25e63f1d945d0 upstream.

The slab name ends up being visible in the directory structure under
/sys, and even if you don't have access rights to the file you can see
the filenames.

Just use a 64-bit counter instead of the pointer to the 'net' structure
to generate a unique name.

This code will go away in 4.7 when the conntrack code moves to a single
kmemcache, but this is the backportable simple solution to avoiding
leaking kernel pointers to user space.

Fixes: 5b3501faa874 ("netfilter: nf_conntrack: per netns nf_conntrack_cachep")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-18 17:06:57 -07:00
..
2015-10-13 17:42:34 +02:00
2016-05-18 17:06:41 -07:00
2015-11-23 14:56:15 -05:00
2015-11-02 22:47:14 -05:00
2015-10-23 03:05:19 -07:00
2015-10-07 04:27:43 -07:00
2016-05-18 17:06:40 -07:00
2015-10-21 00:49:24 +02:00