Avoid crashing the machine by checking
info->attrs[NL802154_ATTR_SCAN_TYPE] presence before de-referencing it,
which was the primary intend of the blamed patch.
Reported-by: Sanan Hasanov <sanan.hasanov@xxxxxxxxxxxxxxx>
Suggested-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Fixes: a0b6106672b5 ("ieee802154: Convert scan error messages to extack")
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
net/ieee802154/nl802154.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 88380606af2c..a18fb98a4b09 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -1412,7 +1412,7 @@ static int nl802154_trigger_scan(struct sk_buff *skb, struct genl_info *info)
return -EOPNOTSUPP;
}
- if (!nla_get_u8(info->attrs[NL802154_ATTR_SCAN_TYPE])) {
+ if (!info->attrs[NL802154_ATTR_SCAN_TYPE]) {
NL_SET_ERR_MSG(info->extack, "Malformed request, missing scan type");
return -EINVAL;
}
--
2.34.1
