diff options
| author | Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2019-06-12 17:15:40 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-12 17:13:02 +0200 |
| commit | 5f54a85db5df67df8161739a4b2f9c2b7ab219fe (patch) | |
| tree | 527ddbb225b264ec03b33217e0c89b67c4bab33f | |
| parent | c2ed3d474fac61ab46468c5365f84f59dc6e173f (diff) | |
| download | linux-5f54a85db5df67df8161739a4b2f9c2b7ab219fe.tar.bz2 | |
usb: typec: Make sure an alt mode exist before getting its partner
Adding check to typec_altmode_get_partner() to prevent
potential NULL pointer dereference.
Reported-by: Vladimir Yerilov <openmindead@gmail.com>
Fixes: ad74b8649bea ("usb: typec: ucsi: Preliminary support for alternate modes")
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/typec/bus.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/typec/bus.c b/drivers/usb/typec/bus.c index 76299b6ff06d..74cb3c2ecb34 100644 --- a/drivers/usb/typec/bus.c +++ b/drivers/usb/typec/bus.c @@ -192,7 +192,7 @@ EXPORT_SYMBOL_GPL(typec_altmode_vdm); const struct typec_altmode * typec_altmode_get_partner(struct typec_altmode *adev) { - return &to_altmode(adev)->partner->adev; + return adev ? &to_altmode(adev)->partner->adev : NULL; } EXPORT_SYMBOL_GPL(typec_altmode_get_partner); |