summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorMathias Krause <minipli@googlemail.com>2013-04-07 01:51:57 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-01 08:56:39 -0700
commit6ccd06ead508da8351bae3aab57a2efba954cb2d (patch)
tree250ed54f932067ee585817c7a527b0d17e9079ea /net
parentaf9659917d0547ebb4233635d2dc496d29fd5d7c (diff)
netrom: fix info leak via msg_name in nr_recvmsg()
[ Upstream commits 3ce5efad47b62c57a4f5c54248347085a750ce0e and c802d759623acbd6e1ee9fbdabae89159a513913 ] In case msg_name is set the sockaddr info gets filled out, as requested, but the code fails to initialize the padding bytes of struct sockaddr_ax25 inserted by the compiler for alignment. Also the sax25_ndigis member does not get assigned, leaking four more bytes. Both issues lead to the fact that the code will leak uninitialized kernel stack bytes in net/socket.c. Fix both issues by initializing the memory with memset(0). Signed-off-by: Mathias Krause <minipli@googlemail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/netrom/af_netrom.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index f1563823696a..aca28b9d2ada 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1178,6 +1178,7 @@ static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
}
if (sax != NULL) {
+ memset(sax, 0, sizeof(sax));
sax->sax25_family = AF_NETROM;
skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call,
AX25_ADDR_LEN);