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| author |   Mateusz Jurczyk <mjurczyk@google.com> | 2017-06-29 14:04:59 +0200 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2017-06-29 14:37:57 +0200 |
| commit | d2ecfa765dff59145a4ba9c84856e50c4f43c2b2 (patch) | |
| tree | 234b4b6a034d7398be70b2ca7dd655de5aad864d /net/bluetooth/sco.c | |
| parent | bluetooth: remove WQ_MEM_RECLAIM from hci workqueues (diff) | |
| download | linux-dev-d2ecfa765dff59145a4ba9c84856e50c4f43c2b2.tar.xz linux-dev-d2ecfa765dff59145a4ba9c84856e50c4f43c2b2.zip | |
Bluetooth: Add sockaddr length checks before accessing sa_family in bind and connect handlers
Verify that the caller-provided sockaddr structure is large enough to
contain the sa_family field, before accessing it in bind() and connect()
handlers of the Bluetooth sockets. Since neither syscall enforces a minimum
size of the corresponding memory region, very short sockaddrs (zero or one
byte long) result in operating on uninitialized memory while referencing
sa_family.
Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/sco.c')
| -rw-r--r-- | net/bluetooth/sco.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index 728e0c8dc8e7..795e920a3281 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -524,10 +524,8 @@ static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr); - if (!addr || addr->sa_family != AF_BLUETOOTH) - return -EINVAL; - - if (addr_len < sizeof(struct sockaddr_sco)) + if (!addr || addr_len < sizeof(struct sockaddr_sco) || + addr->sa_family != AF_BLUETOOTH) return -EINVAL; lock_sock(sk); |