diff options
| author | Kees Cook <keescook@chromium.org> | 2013-08-28 22:30:49 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-26 16:52:47 -0700 |
| commit | c993386d8c99c60ffb1161076040f3ffb46c0794 (patch) | |
| tree | 55aaa0245721002aa66ad37562a8e5a23caaf1fe /drivers/hid/hid-pl.c | |
| parent | 8600be1d3927e177b80c7ee9263ef3b28a0ba115 (diff) | |
| download | kernel_samsung_smdk4412-c993386d8c99c60ffb1161076040f3ffb46c0794.zip kernel_samsung_smdk4412-c993386d8c99c60ffb1161076040f3ffb46c0794.tar.gz kernel_samsung_smdk4412-c993386d8c99c60ffb1161076040f3ffb46c0794.tar.bz2 | |
HID: pantherlord: validate output report details
commit 412f30105ec6735224535791eed5cdc02888ecb4 upstream.
A HID device could send a malicious output report that would cause the
pantherlord HID driver to write beyond the output report allocation
during initialization, causing a heap overflow:
[ 310.939483] usb 1-1: New USB device found, idVendor=0e8f, idProduct=0003
...
[ 315.980774] BUG kmalloc-192 (Tainted: G W ): Redzone overwritten
CVE-2013-2892
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hid/hid-pl.c')
| -rw-r--r-- | drivers/hid/hid-pl.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/hid/hid-pl.c b/drivers/hid/hid-pl.c index 06e5300..fa74232 100644 --- a/drivers/hid/hid-pl.c +++ b/drivers/hid/hid-pl.c @@ -128,8 +128,14 @@ static int plff_init(struct hid_device *hid) strong = &report->field[0]->value[2]; weak = &report->field[0]->value[3]; debug("detected single-field device"); - } else if (report->maxfield >= 4 && report->field[0]->maxusage == 1 && - report->field[0]->usage[0].hid == (HID_UP_LED | 0x43)) { + } else if (report->field[0]->maxusage == 1 && + report->field[0]->usage[0].hid == + (HID_UP_LED | 0x43) && + report->maxfield >= 4 && + report->field[0]->report_count >= 1 && + report->field[1]->report_count >= 1 && + report->field[2]->report_count >= 1 && + report->field[3]->report_count >= 1) { report->field[0]->value[0] = 0x00; report->field[1]->value[0] = 0x00; strong = &report->field[2]->value[0]; |