From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794590233; b=4J3yqEhlF3YAxi+v+q1on0gOWhxauF9casiW9Dm/52LXtJmFy0S85jSopv7G8TOpyQMH iOA3VtcAIk31vGi+4Q7OIo9QU8nCTeXdK29tnIRnWM64Y/SxdmYQHKIBecklvT6n29017 Zb9U4Ux4wMmfY0HXJ/1sZYACWSwR2NjAQEMREjQ9cF5UtpjrEdo/d2BzXhU0rUyWm0hsS KH9+6jRie7087/0QaKodAi1PFc/bsW7Vl3gemxPuILFaW9cfZqDEdHOafMamYFqukxf0w ydRdf7VUNjCpw71FNlTh6hem9/3rZ4KUpA13RU/B/AJgCaZq/XX3gKxPWujICtmrYiA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794590233; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=JPKxzb+SNFFVdmhL7ON19hoAhaG1YwRiSd4TNxhqPaI=; b=cYL20c7D3h3uQdndkuu71tdQ0L/5jzTugq2SYKx9IeZfnwEKCm/LK/To6D8L3M7JdFbS jKUDFhiiCyDMY/+jvZEMMFirY7YD9s0RCF2CqtwHqhW0mpNyJ8sjP65RwBxobjkH9c9Mf UUQ4kNV2JHeJh0g+LOfGI0h4x+OrvoDK0g9RWzGjhLCAZeLIpJs7sPAyk50W+6UR9I33O +UoJhrK1ENzr8QSIfFRRJ/ycaJkAnBDUTeCWl4G1h7+gACYHC8HOeDdjW7A+8aam8nVJn lSM3DfcQyvmx7iuV8tcEfyosF0KZddTLxSVH6oAhbgL1XXBUTLadc2N0Sz+1uvps0Hg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=dGyh3+lJ; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 33B016075E07; Fri, 13 Nov 2026 17:17:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=dGyh3+lJ Received: by smtp.kernel.org (Postfix) with ESMTPSA id D50CD1F000C5; Fri, 13 Nov 2026 17:17:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794590233; bh=JPKxzb+SNFFVdmhL7ON19hoAhaG1YwRiSd4TNxhqPaI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=dGyh3+lJyjUCWwHCvT96lzJoMPu/THELUSLae5TKxOmiAybuySm4IT2AGQ4fwRHKz AbeMhTeyTQkOYM0GI9eePdbEjLbxx+NT6mvJ1mT86ZLy/85sDYZwXluXw5ZzCceoSP AcQa0upRRN/+tOo9tsR4SkKN3V3LMSq4u5T2oi+8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Michael Grzeschik , Dominique Martinet , Sasha Levin Subject: [PATCH 6.18 190/686] net/9p/usbg: fix out_req buffer leak in disable_usb9pfs Date: Fri, 13 Nov 2026 10:45:23 -0500 Message-ID: <20261113153827.443115923@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261113153820.902362109@linuxfoundation.org> References: <20261113153820.902362109@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Michael Grzeschik [ Upstream commit 5f9807270c7bda8f86b312ed1a8acd7716600555 ] usb9pfs->out_req is allocated with alloc_ep_req(), which also allocates the request's data buffer (req->buf). disable_usb9pfs() frees it with plain usb_ep_free_request(), which only frees the usb_request structure itself and leaks req->buf on every close. Use free_ep_req() instead, matching the allocator, as documented by its own comment ("Requests allocated via alloc_ep_req() *must* be freed by free_ep_req()"). Fixes: a3be076dc174 ("net/9p/usbg: Add new usb gadget function transport") Cc: stable@vger.kernel.org Assisted-by: Claude:claude-opus-4.8 Signed-off-by: Michael Grzeschik Message-ID: <20260922-usb9pfsfixes-v1-5-9d8dcc52904c@kernel.org> Signed-off-by: Dominique Martinet Signed-off-by: Sasha Levin --- net/9p/trans_usbg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/9p/trans_usbg.c b/net/9p/trans_usbg.c index c58d57232369e..301123725a671 100644 --- a/net/9p/trans_usbg.c +++ b/net/9p/trans_usbg.c @@ -286,7 +286,7 @@ static void disable_usb9pfs(struct f_usb9pfs *usb9pfs) } if (usb9pfs->out_req) { - usb_ep_free_request(usb9pfs->out_ep, usb9pfs->out_req); + free_ep_req(usb9pfs->out_ep, usb9pfs->out_req); usb9pfs->out_req = NULL; } dev_dbg(&cdev->gadget->dev, "%s disabled\n", -- 2.53.0