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| author | Peter Hurley <peter@hurleysoftware.com> | 2014-02-09 20:59:10 -0500 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-02-14 13:39:30 -0800 |
| commit | c10a848cea89a8f0418fa0efec33c4e8507aab4b (patch) | |
| tree | 1c6eaf6a370f29ca4438bac6a8654c1fabbb1ae2 /net/bluetooth/rfcomm/tty.c | |
| parent | c949c224cfd7d5445ef947e8b93c0657323d5be5 (diff) | |
| download | linux-c10a848cea89a8f0418fa0efec33c4e8507aab4b.tar.bz2 | |
Bluetooth: Verify dlci not in use before rfcomm_dev create
Only one session/channel combination may be in use at any one
time. However, the failure does not occur until the tty is
opened (in rfcomm_dlc_open()).
Because these settings are actually bound at rfcomm device
creation (via RFCOMMCREATEDEV ioctl), validate and fail before
creating the rfcomm tty device.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Tested-By: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/rfcomm/tty.c')
| -rw-r--r-- | net/bluetooth/rfcomm/tty.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index 6ea08b05b53a..a58d693e1e61 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -385,6 +385,14 @@ static int rfcomm_create_dev(struct sock *sk, void __user *arg) dlc = rfcomm_pi(sk)->dlc; rfcomm_dlc_hold(dlc); } else { + /* Validate the channel is unused */ + dlc = rfcomm_dlc_exists(&req.src, &req.dst, req.channel); + if (IS_ERR(dlc)) + return PTR_ERR(dlc); + else if (dlc) { + rfcomm_dlc_put(dlc); + return -EBUSY; + } dlc = rfcomm_dlc_alloc(GFP_KERNEL); if (!dlc) return -ENOMEM; |