diff options
| author | Julia Lawall <julia@diku.dk> | 2010-05-15 11:46:36 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2010-05-17 10:42:37 +0200 |
| commit | aeacb6fd30c800e8229905eac7023777a472d772 (patch) | |
| tree | dd4b904cb23f070d05fae452c0d89722b670151b | |
| parent | 9d71ea057bc4823058d8fe27d34e987eb9880457 (diff) | |
HID: picolcd: Eliminate use after free
The skip label frees resp, which has not been allocated at the point of
this goto and then does a break, based on the fact that err is non-zero.
This is replaced by a break directly.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@free@
expression E;
position p;
@@
kfree@p(E)
@@
expression free.E, subE<=free.E, E1;
position free.p;
@@
kfree@p(E)
...
(
subE = E1
|
* E
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -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 95253b31054..7aabf65c48e 100644 --- a/drivers/hid/hid-picolcd.c +++ b/drivers/hid/hid-picolcd.c @@ -1616,7 +1616,7 @@ static ssize_t _picolcd_flash_write(struct picolcd_data *data, int report_id, raw_data[len_off] = s > 32 ? 32 : s; if (copy_from_user(raw_data+len_off+1, u, raw_data[len_off])) { err = -EFAULT; - goto skip; + break; } resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off+1+raw_data[len_off]); |