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 8C8764C6A for ; Mon, 14 Nov 2022 12:52:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D1E2BC433D6; Mon, 14 Nov 2022 12:52:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1668430373; bh=hRW1vzj5frNZZPOAZ3Qe8cHgExhf9VfZmSpfrXnJ4bM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PoofuzlgOIV0h4mspsrpUiP+8CdkSc33E5GkN3CWWwD1ABWPaRm5XuRJ30p/Xzs+F PSTgVw9kVhFgu5VX2FiBmPQR5pvztbA+1u8ttjbZdLI+cxzhN0VjHGvmO9PI1H7LuY nKET9DxEv40CpsRqD9PuU6WMK7ezG+j60ebLdy24= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Arend van Spriel , Johannes Berg , Sasha Levin Subject: [PATCH 5.15 010/131] wifi: cfg80211: fix memory leak in query_regdb_file() Date: Mon, 14 Nov 2022 13:44:39 +0100 Message-Id: <20221114124449.188513242@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221114124448.729235104@linuxfoundation.org> References: <20221114124448.729235104@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Arend van Spriel [ Upstream commit 57b962e627ec0ae53d4d16d7bd1033e27e67677a ] In the function query_regdb_file() the alpha2 parameter is duplicated using kmemdup() and subsequently freed in regdb_fw_cb(). However, request_firmware_nowait() can fail without calling regdb_fw_cb() and thus leak memory. Fixes: 007f6c5e6eb4 ("cfg80211: support loading regulatory database as firmware file") Signed-off-by: Arend van Spriel Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/wireless/reg.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 54c13ea7d977..7b19a2087db9 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -1083,6 +1083,8 @@ MODULE_FIRMWARE("regulatory.db"); static int query_regdb_file(const char *alpha2) { + int err; + ASSERT_RTNL(); if (regdb) @@ -1092,9 +1094,13 @@ static int query_regdb_file(const char *alpha2) if (!alpha2) return -ENOMEM; - return request_firmware_nowait(THIS_MODULE, true, "regulatory.db", - ®_pdev->dev, GFP_KERNEL, - (void *)alpha2, regdb_fw_cb); + err = request_firmware_nowait(THIS_MODULE, true, "regulatory.db", + ®_pdev->dev, GFP_KERNEL, + (void *)alpha2, regdb_fw_cb); + if (err) + kfree(alpha2); + + return err; } int reg_reload_regdb(void) -- 2.35.1