Commit 9344a972 authored by Mathias Krause's avatar Mathias Krause Committed by David S. Miller
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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: default avatarMathias Krause <>
Cc: Marcel Holtmann <>
Cc: Gustavo Padovan <>
Cc: Johan Hedberg <>
Signed-off-by: default avatarDavid S. Miller <>
parent f9432c5e
......@@ -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)
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