Bluetooth: RFCOMM - Fix info leak via getsockname()
authorMathias Krause <minipli@googlemail.com>
Wed, 15 Aug 2012 11:31:50 +0000 (11:31 +0000)
committerDavid S. Miller <davem@davemloft.net>
Thu, 16 Aug 2012 04:36:31 +0000 (21:36 -0700)
commit9344a972961d1a6d2c04d9008b13617bcb6ec2ef
treec6cf635fe8226c8cb008b9f2717b992ac6f2f2ad
parentf9432c5ec8b1e9a09b9b0e5569e3c73db8de432a
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>
net/bluetooth/rfcomm/sock.c