From patchwork Fri Mar 1 18:36:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Berg X-Patchwork-Id: 13578981 X-Patchwork-Delegate: johannes@sipsolutions.net Received: from sipsolutions.net (s3.sipsolutions.net [168.119.38.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0698C16FF21 for ; Fri, 1 Mar 2024 18:36:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=168.119.38.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709318216; cv=none; b=dgrMtO0fZoXsYo5AB5t4tb9RhAjp/oIHxG1GtachpVNDkir681569i/RPXcqAuyqwtOFAmmVZvECYugGkWkIuEyPbFlSkGKjDzBhys8GDZbX79nNvb9CaHDD/l+5VHOGdpA2AaoeoZ03zi8ozVrkpui0TDhkbK3m0E4n0UfbHhg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709318216; c=relaxed/simple; bh=3iz7XtdjERYQ2R9RcAmUy1GRR/7Ka1HMePpBpUmZrhU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cILJCvQtgJnVC97eGVuMtPIxxHQlxYDyF8iHzpN7M/hK8kLsnFQvAe1VfRG/Q2VCksHqsk5a8jIxuz8m56lfYWBNn6km4zVh5WiHT9lpWeAyRpNWNDVUE6uKHUPEJ5tHGAIoFurOB399MPxljySDX2X76k7jekKJa0kbFHTvCBs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sipsolutions.net; spf=pass smtp.mailfrom=sipsolutions.net; dkim=pass (2048-bit key) header.d=sipsolutions.net header.i=@sipsolutions.net header.b=YfV5eTvx; arc=none smtp.client-ip=168.119.38.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sipsolutions.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sipsolutions.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sipsolutions.net header.i=@sipsolutions.net header.b="YfV5eTvx" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sipsolutions.net; s=mail; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Content-Type:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-To: Resent-Cc:Resent-Message-ID; bh=iXBnj+gC3QiogAq6En1XKOLj+1HgkAQZB9y1wnw24Bw=; t=1709318213; x=1710527813; b=YfV5eTvxi5Avd0sa5ZRavsDyawFNddOlp4kTe9rkWCgDHzm 6o9vDd0wtbuMmW//cPjab6dW3ilU1fpSwxmaPFQz77TXRw32As31lFcXB3kBWXU2n9ZWXCv2e/JtH /UlDzuwBoEb/KWU/ig/DoWvWAkp0WVLXcKeCCe8JGwPL+GoWtos6EwUf6DqE1ww5CJj4No4qn8/LL udWreZ3D4LAUJqoLQ6nTSitdEfamY2WkUotf4Ogju5SR8Z3QOZT42mzmUeLdZUGJJmMdnzSgFZ2bk 0t6PKc9Tw/7C6Y660OooaFpx1ZouPJZuy3HMtRViGclR/Q9hrNQbQ1/lJ7XAcb/g==; Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.97) (envelope-from ) id 1rg7kY-0000000FC4Q-0oxm; Fri, 01 Mar 2024 19:36:50 +0100 From: Johannes Berg To: linux-wireless@vger.kernel.org Cc: Johannes Berg , Dan Carpenter , Miriam Rachel Korenblit Subject: [PATCH 2/2] wifi: mac80211: check link exists before use Date: Fri, 1 Mar 2024 19:36:33 +0100 Message-ID: <20240301193633.c886d300e90a.Ie1d5e23b2a033d934d343c37249f6f4dfddcc5fe@changeid> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240301193633.1a3fc370f211.I979dd222b3b5eb5e1437886e5f7c2355eeccb9f7@changeid> References: <20240301193633.1a3fc370f211.I979dd222b3b5eb5e1437886e5f7c2355eeccb9f7@changeid> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Johannes Berg If the assoc link doesn't exist yet at this point, we cannot use it yet. This isn't normally the case, but e.g. in case of FT-DS (or just broken userspace) the link might not be set up yet and will only be created later in this function. Check that the link exists. Fixes: 310c8387c638 ("wifi: mac80211: clean up connection process") Reported-by: Dan Carpenter Closes: https://lore.kernel.org/r/3151f5d0-c18f-413d-b34b-b94f095b947c@moroto.mountain Reviewed-by: Miriam Rachel Korenblit Signed-off-by: Johannes Berg --- net/mac80211/mlme.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 89c4165f2753..c60d23da91fe 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -8173,7 +8173,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, eth_random_addr(assoc_data->link[i].addr); sband = local->hw.wiphy->bands[link_cbss->channel->band]; - if (match_auth && i == assoc_link_id) + if (match_auth && i == assoc_link_id && link) assoc_data->link[i].conn = link->u.mgd.conn; else assoc_data->link[i].conn =