diff options
| author | Kees Cook <keescook@chromium.org> | 2013-08-28 22:31:52 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-10-26 21:06:02 +0100 |
| commit | 49ad1670d8a0a8e9a7f84272e3054c80563b87bc (patch) | |
| tree | 922a25bbca19ff9d0cfa327f54c456a7ba1255a9 /drivers/hid | |
| parent | c790976bda06884d78a1f8208d74e566ac41954e (diff) | |
HID: picolcd_core: validate output report details
commit 1e87a2456b0227ca4ab881e19a11bb99d164e792 upstream.
A HID device could send a malicious output report that would cause the
picolcd HID driver to trigger a NULL dereference during attr file writing.
[jkosina@suse.cz: changed
report->maxfield < 1
to
report->maxfield != 1
as suggested by Bruno].
CVE-2013-2899
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Bruno Prémont <bonbons@linux-vserver.org>
Acked-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-picolcd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/hid-picolcd.c b/drivers/hid/hid-picolcd.c index 01e7d2cd7c26..1daeacabc832 100644 --- a/drivers/hid/hid-picolcd.c +++ b/drivers/hid/hid-picolcd.c @@ -1424,7 +1424,7 @@ static ssize_t picolcd_operation_mode_store(struct device *dev, buf += 10; cnt -= 10; } - if (!report) + if (!report || report->maxfield != 1) return -EINVAL; while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r')) |