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 1C0B63A6B7F; Wed, 30 Sep 2026 18:57:03 +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=1790794624; cv=none; b=PoE/C6RhTqU89thXWbZr/H5cBKN5y3yCBqru0xz6fArvXz9MfGTrHu2kOkjwDKUwSDs31QC0huTx7IB/Dj1fMbYPgkIJceHfMR94O1x7AQmyQJCvBuBepzZdMVTIl5FyseCVWqFUdMUc+N7nrHdEupc8JnuiQhPF8YcWHxQdIjE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790794624; c=relaxed/simple; bh=q7SgLEnRvLqDSnLWbXR0bHHr5OHSliNNDlI1uMY+WDE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Faf80z35P2HDrkCazOU3VElCM2oWVFrvEHTG315E3FPbUJsf5AxXh02uvNND7uz0aUYxKRzAQON7Uy5Wewdn9sizj5Z1BhlImqEBqoSlrp+uNNToDRUtiCVTk/toO3vm0j0YuJbRaeuIM+yJujMK1b4XAAG0bJRoFfZl+ug6KbA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YmSSTvRF; 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="YmSSTvRF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A24FF1F000FF; Wed, 30 Sep 2026 18:57:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790794623; bh=pzd9oEQMrP5JoUJrxoFzgZFPzlM8NZ7sTMXLAszFJrw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YmSSTvRFkUbvkyfKhtE1gM4as/e1qXiHp0OpQtJ3GoGyRFDL6BiGXFsDzF/7YsQd5 LY5OcI9Nml9V2qiG+DnEurHIX5SUTQLGmMrtcdWXTMvPpR5RA9Tm/WeH18Ud/Kk/WG V+erOiM9oeX1Tuco6AuUO0N1Lww06dYTryhVZoBU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Qiang Liu , ChenXiaoSong , Namjae Jeon , Steve French , Sasha Levin Subject: [PATCH 6.6 0274/1193] ksmbd: fix sd_ndr.data memory leak in ksmbd_vfs_set_sd_xattr Date: Wed, 30 Sep 2026 17:15:58 +0200 Message-ID: <20260930152440.252630292@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152434.301151190@linuxfoundation.org> References: <20260930152434.301151190@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Qiang Liu [ Upstream commit d4d56b00c7df88cd5751e7415bdfabc9fdbc82a7 ] ndr_encode_v4_ntacl() allocates sd_ndr.data via kzalloc() at entry. If any subsequent ndr_write_*() call returns error during encoding, the allocated sd_ndr.data won't be freed and causes memory leak. Move kfree(sd_ndr.data) into out label to ensure the buffer gets released on all success and error return paths. Signed-off-by: Qiang Liu Reviewed-by: ChenXiaoSong Acked-by: Namjae Jeon Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/smb/server/vfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c index 775c53e48adec..bdd33c5554292 100644 --- a/fs/smb/server/vfs.c +++ b/fs/smb/server/vfs.c @@ -1544,8 +1544,8 @@ int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, if (rc < 0) pr_err("Failed to store XATTR ntacl :%d\n", rc); - kfree(sd_ndr.data); out: + kfree(sd_ndr.data); kfree(acl_ndr.data); kfree(smb_acl); kfree(def_smb_acl); -- 2.53.0