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| author | Mathias Krause <minipli@googlemail.com> | 2012-08-15 13:31:50 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-16 06:36:31 +0200 |
| commit | 9344a972961d1a6d2c04d9008b13617bcb6ec2ef (patch) | |
| tree | c6cf635fe8226c8cb008b9f2717b992ac6f2f2ad /net/bluetooth/rfcomm | |
| parent | Bluetooth: RFCOMM - Fix info leak in ioctl(RFCOMMGETDEVLIST) (diff) | |
| download | linux-9344a972961d1a6d2c04d9008b13617bcb6ec2ef.tar.xz linux-9344a972961d1a6d2c04d9008b13617bcb6ec2ef.zip | |
Bluetooth: RFCOMM - Fix info leak via getsockname()
The RFCOMM code fails to initialize the trailing padding byte of struct
sockaddr_rc added for alignment. It that for leaks one byte kernel stack
via the getsockname() syscall. Add an explicit memset(0) before filling
the structure to avoid the info leak.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bluetooth/rfcomm')
| -rw-r--r-- | net/bluetooth/rfcomm/sock.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 64f55ca61472..1a17850d093c 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -528,6 +528,7 @@ static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int * BT_DBG("sock %p, sk %p", sock, sk); + memset(sa, 0, sizeof(*sa)); sa->rc_family = AF_BLUETOOTH; sa->rc_channel = rfcomm_pi(sk)->channel; if (peer) |