From: Jérôme Pouiller <jerome.pouiller@xxxxxxxxxx>
Smatch complains:
hif_tx.c:319 hif_join() error: we previously assumed 'channel' could be null (see line 315)
311 if (!hif)
312 return -ENOMEM;
313 body->infrastructure_bss_mode = !conf->ibss_joined;
314 body->short_preamble = conf->use_short_preamble;
315 if (channel && channel->flags & IEEE80211_CHAN_NO_IR)
^^^^^^^
316 body->probe_for_join = 0;
317 else
318 body->probe_for_join = 1;
319 body->channel_number = channel->hw_value;
^^^^^^^^^^^^^^^^^
320 body->beacon_interval = cpu_to_le32(conf->beacon_int);
321 body->basic_rate_set =
Indeed, channel can't be NULL (else I would have seen plenty of Ooops
this past year). This patch explicitly claims this restriction.
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@xxxxxxxxxx>
---
drivers/staging/wfx/hif_tx.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/wfx/hif_tx.c b/drivers/staging/wfx/hif_tx.c
index e61cc2486761..63b437261eb7 100644
--- a/drivers/staging/wfx/hif_tx.c
+++ b/drivers/staging/wfx/hif_tx.c
@@ -308,11 +308,13 @@ int hif_join(struct wfx_vif *wvif, const struct ieee80211_bss_conf *conf,
WARN_ON(!conf->basic_rates);
WARN_ON(sizeof(body->ssid) < ssidlen);
WARN(!conf->ibss_joined && !ssidlen, "joining an unknown BSS");
+ if (WARN_ON(!channel))
+ return -EINVAL;
if (!hif)
return -ENOMEM;
body->infrastructure_bss_mode = !conf->ibss_joined;
body->short_preamble = conf->use_short_preamble;
- if (channel && channel->flags & IEEE80211_CHAN_NO_IR)
+ if (channel->flags & IEEE80211_CHAN_NO_IR)
body->probe_for_join = 0;
else
body->probe_for_join = 1;
--
2.28.0
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