diff options
| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2016-02-07 23:35:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-07 14:47:20 -0800 |
| commit | 15c13dfcad883a1e76b714480fb27be96247fd82 (patch) | |
| tree | fbdf6b7723715845e029ff3c2a722303e1664b2c /drivers/misc/mei/bus.c | |
| parent | 850f8940a6a38563ff401073fd845414ab49c5ed (diff) | |
mei: bus: check if the device is enabled before data transfer
The bus data transfer interface was missing the check if the device is
in enabled state, this may lead to stack corruption during link reset.
Cc: <stable@vger.kernel.org> #4.0
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/bus.c')
| -rw-r--r-- | drivers/misc/mei/bus.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 990f4f65c35e..83b084558ee5 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -53,6 +53,11 @@ ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, bus = cl->dev; mutex_lock(&bus->device_lock); + if (bus->dev_state != MEI_DEV_ENABLED) { + rets = -ENODEV; + goto out; + } + if (!mei_cl_is_connected(cl)) { rets = -ENODEV; goto out; @@ -109,6 +114,10 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length) bus = cl->dev; mutex_lock(&bus->device_lock); + if (bus->dev_state != MEI_DEV_ENABLED) { + rets = -ENODEV; + goto out; + } cb = mei_cl_read_cb(cl, NULL); if (cb) |