From: Johannes Berg johannes.berg@intel.com
[ Upstream commit ab10c22bc3b2024f0c9eafa463899a071eac8d97 ]
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: fe1abafd942f ("nl80211: re-add channel width and extended capa advertising") Signed-off-by: Johannes Berg johannes.berg@intel.com Link: https://lore.kernel.org/r/20200928130717.3e6d9c6bada2.Ie0f151a8d0d00a8e1e18f... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 7cbb94b4d4917..47ab86ee192ac 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2355,7 +2355,10 @@ 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 (rdev->wiphy.extended_capabilities &&