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 3BD3F7D414; Mon, 8 Apr 2024 13:43:15 +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=1712583795; cv=none; b=FUbni7hkmwIRFef0vk9XnxF3tIsQNs7XyhZMHrsuI7VVE4dxfeZ/fgB+IfN1irBUMkSKZGj1zo2kHS4Cylul7QzV6pE4qFGsThY9Utl0TK1vSP0j8hNZS0zoW9pCerNb02GjmfUEY/eGxHVTFmdY3C7/Q+IHVlcTTB+cPeBEF2Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712583795; c=relaxed/simple; bh=MbDm9GNz0xx20jrp5tLnIXPyOVqS26BwuTJKeMLQ6Fg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YBciqDcRvsqMjA834nlGyOaS1ldTONabWelbFjbW+nnsXhm36WH8Ku7M41MbyYUaHmhwbWWWw0XFI7q8O4ZA9zfk7jCzBbtNwjARFv9Iufw/lfL2N+CSR3dtXgZVXAGSAgX3FS1AjisSPl3KPe/YFpq9QZebkLSAhc90SNjSXD4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=oRzObNjy; 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="oRzObNjy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BAC5CC433F1; Mon, 8 Apr 2024 13:43:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1712583795; bh=MbDm9GNz0xx20jrp5tLnIXPyOVqS26BwuTJKeMLQ6Fg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oRzObNjyYhaCwNbm0FAMF3EPdqLq3WUqauljSzOEcwhGgDHASF+dKY9FTY45KLxmX iJmNUCfaQzFotvFCUoE5gdUOmcSEFCY/cIGNutccjFiMlZx3MchTXQQzfNZZbgtxJ+ WQVjPYVk3WfiG43VEVKlhSJKLXC3FIyKZc6uG0t8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Paulo Alcantara (Red Hat)" , Steve French Subject: [PATCH 6.6 234/252] smb: client: fix potential UAF in smb2_is_valid_lease_break() Date: Mon, 8 Apr 2024 14:58:53 +0200 Message-ID: <20240408125313.917050937@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240408125306.643546457@linuxfoundation.org> References: <20240408125306.643546457@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org 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: Paulo Alcantara commit 705c76fbf726c7a2f6ff9143d4013b18daaaebf1 upstream. Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF. Cc: stable@vger.kernel.org Signed-off-by: Paulo Alcantara (Red Hat) Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/smb/client/smb2misc.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/smb/client/smb2misc.c +++ b/fs/smb/client/smb2misc.c @@ -622,6 +622,8 @@ smb2_is_valid_lease_break(char *buffer, /* look up tcon based on tid & uid */ spin_lock(&cifs_tcp_ses_lock); list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { + if (cifs_ses_exiting(ses)) + continue; list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { spin_lock(&tcon->open_file_lock); cifs_stats_inc(