diff options
| author | Andrew Ballance <andrewjballance@gmail.com> | 2024-06-02 03:50:23 -0500 |
|---|---|---|
| committer | Benjamin Tissoires <bentiss@kernel.org> | 2024-06-07 11:07:40 +0200 |
| commit | 89e1ee118d6f0ee6bd6e80d8fe08839875daa241 (patch) | |
| tree | ac54c344b51509934bb2bf2fdaef17f336d53730 | |
| parent | 9c8f05cf1d7abd1bfb53cebe691bf3acb7baee99 (diff) | |
hid: asus: asus_report_fixup: fix potential read out of bounds
syzbot reported a potential read out of bounds in asus_report_fixup.
this patch adds checks so that a read out of bounds will not occur
Signed-off-by: Andrew Ballance <andrewjballance@gmail.com>
Reported-by: <syzbot+07762f019fd03d01f04c@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=07762f019fd03d01f04c
Fixes: 59d2f5b7392e ("HID: asus: fix more n-key report descriptors if n-key quirked")
Link: https://lore.kernel.org/r/20240602085023.1720492-1-andrewjballance@gmail.com
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
| -rw-r--r-- | drivers/hid/hid-asus.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c index 02de2bf4f790..37e6d25593c2 100644 --- a/drivers/hid/hid-asus.c +++ b/drivers/hid/hid-asus.c @@ -1204,8 +1204,8 @@ static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc, } /* match many more n-key devices */ - if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD) { - for (int i = 0; i < *rsize + 1; i++) { + if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD && *rsize > 15) { + for (int i = 0; i < *rsize - 15; i++) { /* offset to the count from 0x5a report part always 14 */ if (rdesc[i] == 0x85 && rdesc[i + 1] == 0x5a && rdesc[i + 14] == 0x95 && rdesc[i + 15] == 0x05) { |