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authorVasiliy Kulikov <segoon@openwall.com>2011-03-17 01:40:10 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-14 13:02:37 -0700
commit0fc073e4b3b2cd9f5770190e585349adf9743ee3 (patch)
tree56a67c445eb0b143dea58b27daa3fdc4d6726e1c /net
parent182016ec35485381efc0566d88a51d0942fb354d (diff)
econet: 4 byte infoleak to the network
commit 67c5c6cb8129c595f21e88254a3fc6b3b841ae8e upstream. struct aunhdr has 4 padding bytes between 'pad' and 'handle' fields on x86_64. These bytes are not initialized in the variable 'ah' before sending 'ah' to the network. This leads to 4 bytes kernel stack infoleak. This bug was introduced before the git epoch. Signed-off-by: Vasiliy Kulikov <segoon@openwall.com> Acked-by: Phil Blundell <philb@gnu.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net')
-rw-r--r--net/econet/af_econet.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index 0c282633791..116d3fd3d66 100644
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -435,10 +435,10 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
udpdest.sin_addr.s_addr = htonl(network | addr.station);
}
+ memset(&ah, 0, sizeof(ah));
ah.port = port;
ah.cb = cb & 0x7f;
ah.code = 2; /* magic */
- ah.pad = 0;
/* tack our header on the front of the iovec */
size = sizeof(struct aunhdr);