| Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 1 | Fix NULL pointer crash. |
| 2 | |
| 3 | Before use usbbuslist, we should check if it is valid. |
| 4 | |
| 5 | Upstream-Status: Pending |
| 6 | Signed-off-by: Roy.Li <rongqing.li@windriver.com> |
| 7 | --- |
| 8 | lsusb-t.c | 4 ++++ |
| 9 | 1 files changed, 4 insertions(+), 0 deletions(-) |
| 10 | |
| 11 | diff --git a/lsusb-t.c b/lsusb-t.c |
| 12 | index f604155..583a46a 100644 |
| 13 | --- a/lsusb-t.c |
| 14 | +++ b/lsusb-t.c |
| 15 | @@ -643,6 +643,10 @@ static void sort_busses(void) |
| 16 | /* need to reverse sort bus numbers */ |
| 17 | struct usbbusnode *t, *p, **pp; |
| 18 | int swapped; |
| 19 | + |
| 20 | + if (!usbbuslist) |
| 21 | + return; |
| 22 | + |
| 23 | do { |
| 24 | p = usbbuslist; |
| 25 | pp = &usbbuslist; |
| 26 | -- |
| 27 | 1.7.4.1 |
| 28 | |