From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 225BD17BED0; Sat, 17 Oct 2026 16:21:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792254066; cv=none; b=MPpAiOZtQ1IBsV58rsI3dKbelZbVjkQEqU5cyUes+g+tpQRO45X9vD1sFEEy6Rji1TMeyK/usc2dMy2g8mvqfBgUMMC5mfYawO3z/Gne8mso9AtxuqpXd7nPAN0QLPfU4OEyTq485eJq0PmZj/f1R5mRud2qrc+vp6lKE5eeCms= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792254066; c=relaxed/simple; bh=nnboW0y909OSzu2HT/bUAGJ6QtZkE2qxEI9E1SNen/M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kp8rbUj584P5b05xdSs6VF40wuZCpLizqe3Zpc8qtA7w+W3nVpiQQORQRs2Pf3xoElVKacjT4jEFFdiatLoLTH8ytWT7mdrdWdHEwW3/kutH/Z0uaXjEevnaA4HGqnxIDF12yKSDLQz/NwY/awrkUe7n5/tLpNnWPW6ihxkK9uI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=DX/Cls40; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="DX/Cls40" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A6991F000C4; Sat, 17 Oct 2026 16:21:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792254065; bh=ylvb/Hu6/UsZOwdQ7bCmPddWe3bkRmeOWmhYr2AY610=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=DX/Cls40SSmTVF4/fBao/MURyoPcKEMdk1w460Ts+0GVNrezi8umDRumnrDu8Ae7S mJbX3DFxt/x5fw5rAvVSu+j9V/ssxYFVLy0JqDbAZy33LhmuEbgMoqBkH1D+OMkcLf Oqx1Wub/CXxRCD1Lq/fepHh5A0laJM4jd3Pk9ar0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Fedor Pchelkin , Johannes Berg , Sasha Levin Subject: [PATCH 6.12 323/869] wifi: fix leak if split 6 GHz scanning fails Date: Sat, 17 Oct 2026 17:52:44 +0200 Message-ID: <20261017160045.358709579@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261017160036.979869304@linuxfoundation.org> References: <20261017160036.979869304@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fedor Pchelkin [ Upstream commit e8694f7cc29287e843648d1075177b9a2000d957 ] rdev->int_scan_req is leaked if cfg80211_scan() fails. Note that it's supposed to be released at ___cfg80211_scan_done() but this doesn't happen as rdev->scan_req is NULL at that point, too, leading to the early return from the freeing function. unreferenced object 0xffff8881161d0800 (size 512): comm "wpa_supplicant", pid 379, jiffies 4294749765 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 f0 81 13 16 81 88 ff ff ................ backtrace (crc c867fdb6): kmemleak_alloc+0x89/0x90 __kmalloc_noprof+0x2fd/0x410 cfg80211_scan+0x133/0x730 nl80211_trigger_scan+0xc69/0x1cc0 genl_family_rcv_msg_doit+0x204/0x2f0 genl_rcv_msg+0x431/0x6b0 netlink_rcv_skb+0x143/0x3f0 genl_rcv+0x27/0x40 netlink_unicast+0x4f6/0x820 netlink_sendmsg+0x797/0xce0 __sock_sendmsg+0xc4/0x160 ____sys_sendmsg+0x5e4/0x890 ___sys_sendmsg+0xf8/0x180 __sys_sendmsg+0x136/0x1e0 __x64_sys_sendmsg+0x76/0xc0 x64_sys_call+0x13f0/0x17d0 Found by Linux Verification Center (linuxtesting.org). Fixes: c8cb5b854b40 ("nl80211/cfg80211: support 6 GHz scanning") Signed-off-by: Fedor Pchelkin Link: https://patch.msgid.link/20260601094157.92703-1-pchelkin@ispras.ru Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/wireless/scan.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 6fab9abb47b2b..520dcc16920a8 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -1030,6 +1030,7 @@ int cfg80211_scan(struct cfg80211_registered_device *rdev) struct cfg80211_scan_request *request; struct cfg80211_scan_request *rdev_req = rdev->scan_req; u32 n_channels = 0, idx, i; + int err; if (!(rdev->wiphy.flags & WIPHY_FLAG_SPLIT_SCAN_6GHZ)) return rdev_scan(rdev, rdev_req); @@ -1056,8 +1057,14 @@ int cfg80211_scan(struct cfg80211_registered_device *rdev) } rdev_req->scan_6ghz = false; + err = rdev_scan(rdev, request); + if (err) { + kfree(request); + return err; + } + rdev->int_scan_req = request; - return rdev_scan(rdev, request); + return 0; } void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, -- 2.53.0