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Fix NULL pointer crash.
Before use usbbuslist, we should check if it is valid.
Upstream-Status: Pending
Signed-off-by: Roy.Li <rongqing.li@windriver.com>
---
lsusb-t.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/lsusb-t.c b/lsusb-t.c
index f604155..583a46a 100644
--- a/lsusb-t.c
+++ b/lsusb-t.c
@@ -643,6 +643,10 @@ static void sort_busses(void)
/* need to reverse sort bus numbers */
struct usbbusnode *t, *p, **pp;
int swapped;
+
+ if (!usbbuslist)
+ return;
+
do {
p = usbbuslist;
pp = &usbbuslist;
--
1.7.4.1
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