From 901e64dbdb5998b9248c372a401c921bbdf662f6 Mon Sep 17 00:00:00 2001 From: Stefan Achatz Date: Sun, 12 Jun 2011 10:02:44 +0200 Subject: [PATCH] HID: roccat: fix NULL pointer dereference, add range checks On rare occassions raw events can be triggered before drvdata gets set up which leads to NULL pointer dereferences. This was only observed with pyra on 2.6.39, but is fixed for all devices now to play it save. kovaplus returned wrong actual values when profile change was initiated from host. Added range checks for setting actual profile on all devices. Signed-off-by: Stefan Achatz Signed-off-by: Jiri Kosina --- drivers/hid/hid-roccat-arvo.c | 5 ++++- drivers/hid/hid-roccat-kone.c | 3 +++ drivers/hid/hid-roccat-koneplus.c | 8 +++++++- drivers/hid/hid-roccat-kovaplus.c | 5 ++++- drivers/hid/hid-roccat-pyra.c | 3 +++ 5 files changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/hid/hid-roccat-arvo.c b/drivers/hid/hid-roccat-arvo.c index 610536606195c..093bfad00b023 100644 --- a/drivers/hid/hid-roccat-arvo.c +++ b/drivers/hid/hid-roccat-arvo.c @@ -163,6 +163,9 @@ static ssize_t arvo_sysfs_set_actual_profile(struct device *dev, if (retval) return retval; + if (profile < 1 || profile > 5) + return -EINVAL; + temp_buf.command = ARVO_COMMAND_ACTUAL_PROFILE; temp_buf.actual_profile = profile; @@ -399,7 +402,7 @@ static int arvo_raw_event(struct hid_device *hdev, if (size != 3) return 0; - if (arvo->roccat_claimed) + if (arvo && arvo->roccat_claimed) arvo_report_to_chrdev(arvo, data); return 0; diff --git a/drivers/hid/hid-roccat-kone.c b/drivers/hid/hid-roccat-kone.c index 7e29778fe7ab6..2b8f3a31ffb31 100644 --- a/drivers/hid/hid-roccat-kone.c +++ b/drivers/hid/hid-roccat-kone.c @@ -832,6 +832,9 @@ static int kone_raw_event(struct hid_device *hdev, struct hid_report *report, if (size != sizeof(struct kone_mouse_event)) return 0; + if (kone == NULL) + return 0; + /* * Firmware 1.38 introduced new behaviour for tilt and special buttons. * Pressed button is reported in each movement event. diff --git a/drivers/hid/hid-roccat-koneplus.c b/drivers/hid/hid-roccat-koneplus.c index 33ecad50395b8..59e47770fa103 100644 --- a/drivers/hid/hid-roccat-koneplus.c +++ b/drivers/hid/hid-roccat-koneplus.c @@ -431,6 +431,9 @@ static ssize_t koneplus_sysfs_set_actual_profile(struct device *dev, if (retval) return retval; + if (profile > 4) + return -EINVAL; + mutex_lock(&koneplus->koneplus_lock); retval = koneplus_set_actual_profile(usb_dev, profile); @@ -439,7 +442,7 @@ static ssize_t koneplus_sysfs_set_actual_profile(struct device *dev, return retval; } - koneplus->actual_profile = profile; + koneplus_profile_activated(koneplus, profile); roccat_report.type = KONEPLUS_MOUSE_REPORT_BUTTON_TYPE_PROFILE; roccat_report.data1 = profile + 1; @@ -751,6 +754,9 @@ static int koneplus_raw_event(struct hid_device *hdev, != USB_INTERFACE_PROTOCOL_MOUSE) return 0; + if (koneplus == NULL) + return 0; + koneplus_keep_values_up_to_date(koneplus, data); if (koneplus->roccat_claimed) diff --git a/drivers/hid/hid-roccat-kovaplus.c b/drivers/hid/hid-roccat-kovaplus.c index 212e7921e9423..1f8336e3f584a 100644 --- a/drivers/hid/hid-roccat-kovaplus.c +++ b/drivers/hid/hid-roccat-kovaplus.c @@ -337,7 +337,7 @@ static ssize_t kovaplus_sysfs_set_actual_profile(struct device *dev, mutex_lock(&kovaplus->kovaplus_lock); retval = kovaplus_set_actual_profile(usb_dev, profile); - kovaplus->actual_profile = profile; + kovaplus_profile_activated(kovaplus, profile); mutex_unlock(&kovaplus->kovaplus_lock); if (retval) return retval; @@ -662,6 +662,9 @@ static int kovaplus_raw_event(struct hid_device *hdev, != USB_INTERFACE_PROTOCOL_MOUSE) return 0; + if (kovaplus == NULL) + return 0; + kovaplus_keep_values_up_to_date(kovaplus, data); if (kovaplus->roccat_claimed) diff --git a/drivers/hid/hid-roccat-pyra.c b/drivers/hid/hid-roccat-pyra.c index 75a092e0d1d87..8140776bd8c51 100644 --- a/drivers/hid/hid-roccat-pyra.c +++ b/drivers/hid/hid-roccat-pyra.c @@ -637,6 +637,9 @@ static int pyra_raw_event(struct hid_device *hdev, struct hid_report *report, != USB_INTERFACE_PROTOCOL_MOUSE) return 0; + if (pyra == NULL) + return 0; + pyra_keep_values_up_to_date(pyra, data); if (pyra->roccat_claimed) -- 2.30.2