From 36c66e2f74d7d2f2337bcfa7fa676afa20a65ee6 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 28 Sep 2020 13:07:18 +0200 Subject: [PATCH] nl80211: fix non-split wiphy information When dumping wiphy information, we try to split the data into many submessages, but for old userspace we still support the old mode where this doesn't happen. However, in this case we were not resetting our state correctly and dumping multiple messages for each wiphy, which would have broken such older userspace. This was broken pretty much immediately afterwards because it only worked in the original commit where non-split dumps didn't have any more data than split dumps... Fixes: 773a07326b41 ("nl80211: re-add channel width and extended capa advertising") Signed-off-by: Johannes Berg Link: https://lore.kernel.org/r/20200928130717.3e6d9c6bada2.Ie0f151a8d0d00a8e1e18f6a8c9244dd02496af67@changeid Signed-off-by: Johannes Berg --- net/wireless/nl80211.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index d0e2d144cb94b..91d4550677d02 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2428,7 +2428,10 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev, * case we'll continue with more data in the next round, * but break unconditionally so unsplit data stops here. */ - state->split_start++; + if (state->split) + state->split_start++; + else + state->split_start = 0; break; case 9: if (nl80211_send_mgmt_stypes(msg, mgmt_stypes)) -- 2.39.5