Thread (21 messages) 21 messages, 1 author, 2020-01-24
STALE2338d

[PATCH AUTOSEL 4.14 25/32] cfg80211: check for set_wiphy_params

From: Sasha Levin <sashal@kernel.org>
Date: 2020-01-24 14:25:30
Also in: linux-wireless, lkml, stable
Subsystem: 802.11 (including cfg80211/nl80211), the rest · Maintainers: Johannes Berg, Linus Torvalds

From: Johannes Berg <redacted>

[ Upstream commit 24953de0a5e31dcca7e82c8a3c79abc2dfe8fb6e ]

Check if set_wiphy_params is assigned and return an error if not,
some drivers (e.g. virt_wifi where syzbot reported it) don't have
it.

Reported-by: syzbot+e8a797964a4180eb57d5@syzkaller.appspotmail.com
Reported-by: syzbot+34b582cf32c1db008f8e@syzkaller.appspotmail.com
Signed-off-by: Johannes Berg <redacted>
Link: https://lore.kernel.org/r/20200113125358.ac07f276efff.Ibd85ee1b12e47b9efb00a2adc5cd3fac50da791a@changeid (local)
Signed-off-by: Johannes Berg <redacted>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/wireless/rdev-ops.h | 4 ++++
 1 file changed, 4 insertions(+)
diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h
index 96849357dd907..4077bb3af440c 100644
--- a/net/wireless/rdev-ops.h
+++ b/net/wireless/rdev-ops.h
@@ -537,6 +537,10 @@ static inline int
 rdev_set_wiphy_params(struct cfg80211_registered_device *rdev, u32 changed)
 {
 	int ret;
+
+	if (!rdev->ops->set_wiphy_params)
+		return -EOPNOTSUPP;
+
 	trace_rdev_set_wiphy_params(&rdev->wiphy, changed);
 	ret = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 	trace_rdev_return_int(&rdev->wiphy, ret);
-- 
2.20.1
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