From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 584A013E3EF for ; Tue, 5 Nov 2024 16:15:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730823339; cv=none; b=HxF8xFwpf3HViuqZEK3H5ZIcGmrczjeFSjVFWSYtEjs5AZ4lmmS205Bq0v+Xzwemlu6QK7KMW7d7XWqyaO3nviuOQyuNYHCDgY34TTR3mZKVIsRwg+JzljUW3xWSBWQy1XSZghkFw4PFy3OZPpbNz0L12CGR3ASUWMk48L35UEw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730823339; c=relaxed/simple; bh=Tl0vIuqEejTMx0RfmDKIG2lgkdQ1YfIyxJy9fbVflmo=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=unvSfih32CAWS1lraUH3ektqRoWfAoB3fq9Z0JtxDG5ZbnQjzWzlYwu2KAzmS4Ek5OF6VMdfH9Y/b3KSeenFUKvx5R57mQ+Oogcq59TZnfrw96L8HfgQpgqC0xaTLNaIIbdmfd9u4dPGDtMj7l3VM3K85bG+chfM6DHyxL8inQo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YUWQQiaQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="YUWQQiaQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 818F7C4CECF; Tue, 5 Nov 2024 16:15:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1730823338; bh=Tl0vIuqEejTMx0RfmDKIG2lgkdQ1YfIyxJy9fbVflmo=; h=Subject:To:Cc:From:Date:From; b=YUWQQiaQ+nT/YjFg/p243a94jx/ltvNsdS8LV3nIuOw35avOVMLfTx9MbwUr7DCFo rJQ5iH3Ap2CoHAdccY5yCKLRcA24kW5nL9BGtPwGcQCGf5C7fcq5lh+Uzc2MjaP2Ib /V6JQi3RCg0zVkSyj7gufFIYhCkF6OWuhJxEjG7k= Subject: FAILED: patch "[PATCH] wifi: iwlwifi: mvm: fix 6 GHz scan construction" failed to apply to 6.6-stable tree To: johannes.berg@intel.com Cc: From: Date: Tue, 05 Nov 2024 17:15:21 +0100 Message-ID: <2024110521-antler-uneatable-d873@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 7245012f0f496162dd95d888ed2ceb5a35170f1a # git commit -s git send-email --to '' --in-reply-to '2024110521-antler-uneatable-d873@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 7245012f0f496162dd95d888ed2ceb5a35170f1a Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 23 Oct 2024 09:17:44 +0200 Subject: [PATCH] wifi: iwlwifi: mvm: fix 6 GHz scan construction If more than 255 colocated APs exist for the set of all APs found during 2.4/5 GHz scanning, then the 6 GHz scan construction will loop forever since the loop variable has type u8, which can never reach the number found when that's bigger than 255, and is stored in a u32 variable. Also move it into the loops to have a smaller scope. Using a u32 there is fine, we limit the number of APs in the scan list and each has a limit on the number of RNR entries due to the frame size. With a limit of 1000 scan results, a frame size upper bound of 4096 (really it's more like ~2300) and a TBTT entry size of at least 11, we get an upper bound for the number of ~372k, well in the bounds of a u32. Cc: stable@vger.kernel.org Fixes: eae94cf82d74 ("iwlwifi: mvm: add support for 6GHz") Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219375 Link: https://patch.msgid.link/20241023091744.f4baed5c08a1.I8b417148bbc8c5d11c101e1b8f5bf372e17bf2a7@changeid Signed-off-by: Johannes Berg diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c index 3ce9150213a7..ddcbd80a49fb 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c @@ -1774,7 +1774,7 @@ iwl_mvm_umac_scan_cfg_channels_v7_6g(struct iwl_mvm *mvm, &cp->channel_config[ch_cnt]; u32 s_ssid_bitmap = 0, bssid_bitmap = 0, flags = 0; - u8 j, k, n_s_ssids = 0, n_bssids = 0; + u8 k, n_s_ssids = 0, n_bssids = 0; u8 max_s_ssids, max_bssids; bool force_passive = false, found = false, allow_passive = true, unsolicited_probe_on_chan = false, psc_no_listen = false; @@ -1799,7 +1799,7 @@ iwl_mvm_umac_scan_cfg_channels_v7_6g(struct iwl_mvm *mvm, cfg->v5.iter_count = 1; cfg->v5.iter_interval = 0; - for (j = 0; j < params->n_6ghz_params; j++) { + for (u32 j = 0; j < params->n_6ghz_params; j++) { s8 tmp_psd_20; if (!(scan_6ghz_params[j].channel_idx == i)) @@ -1873,7 +1873,7 @@ iwl_mvm_umac_scan_cfg_channels_v7_6g(struct iwl_mvm *mvm, * SSID. * TODO: improve this logic */ - for (j = 0; j < params->n_6ghz_params; j++) { + for (u32 j = 0; j < params->n_6ghz_params; j++) { if (!(scan_6ghz_params[j].channel_idx == i)) continue;