From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756150Ab3KNQYF (ORCPT ); Thu, 14 Nov 2013 11:24:05 -0500 Received: from mail-pb0-f47.google.com ([209.85.160.47]:52431 "EHLO mail-pb0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755051Ab3KNQPh (ORCPT ); Thu, 14 Nov 2013 11:15:37 -0500 From: Peng Tao To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, "John L. Hammond" , Peng Tao , Andreas Dilger Subject: [PATCH 18/40] staging/lustre/mdc: prevent fall through in mdc_iocontrol() Date: Fri, 15 Nov 2013 00:13:20 +0800 Message-Id: <1384445622-12346-19-git-send-email-bergwolf@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1384445622-12346-1-git-send-email-bergwolf@gmail.com> References: <1384445622-12346-1-git-send-email-bergwolf@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "John L. Hammond" In mdc_iocontrol() add a goto to the end of the LL_IOC_HSM_STATE_SET case, preventing fall through into the next case. In the same function, replace the return statement in OBD_IOC_QUOTACTL with a goto, so that a reference to the module is not leaked. Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3576 Lustre-change: http://review.whamcloud.com/6962 Signed-off-by: John L. Hammond Reviewed-by: Aurelien Degremont Reviewed-by: jacques-Charles Lafoucriere Reviewed-by: Oleg Drokin Signed-off-by: Peng Tao Signed-off-by: Andreas Dilger --- drivers/staging/lustre/lustre/mdc/mdc_request.c | 27 +++++++++++------------ 1 file changed, 13 insertions(+), 14 deletions(-) diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c index ed3a7a0..a09a5c3 100644 --- a/drivers/staging/lustre/lustre/mdc/mdc_request.c +++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c @@ -1743,6 +1743,7 @@ static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len, GOTO(out, rc); case LL_IOC_HSM_STATE_SET: rc = mdc_ioc_hsm_state_set(exp, karg); + GOTO(out, rc); case LL_IOC_HSM_ACTION: rc = mdc_ioc_hsm_current_action(exp, karg); GOTO(out, rc); @@ -1814,8 +1815,8 @@ static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len, struct obd_quotactl *oqctl; OBD_ALLOC_PTR(oqctl); - if (!oqctl) - return -ENOMEM; + if (oqctl == NULL) + GOTO(out, rc = -ENOMEM); QCTL_COPY(oqctl, qctl); rc = obd_quotactl(exp, oqctl); @@ -1824,23 +1825,21 @@ static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len, qctl->qc_valid = QC_MDTIDX; qctl->obd_uuid = obd->u.cli.cl_target_uuid; } + OBD_FREE_PTR(oqctl); - break; + GOTO(out, rc); } - case LL_IOC_GET_CONNECT_FLAGS: { - if (copy_to_user(uarg, - exp_connect_flags_ptr(exp), - sizeof(__u64))) + case LL_IOC_GET_CONNECT_FLAGS: + if (copy_to_user(uarg, exp_connect_flags_ptr(exp), + sizeof(*exp_connect_flags_ptr(exp)))) GOTO(out, rc = -EFAULT); - else - GOTO(out, rc = 0); - } - case LL_IOC_LOV_SWAP_LAYOUTS: { + + GOTO(out, rc = 0); + case LL_IOC_LOV_SWAP_LAYOUTS: rc = mdc_ioc_swap_layouts(exp, karg); - break; - } + GOTO(out, rc); default: - CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd); + CERROR("unrecognised ioctl: cmd = %#x\n", cmd); GOTO(out, rc = -ENOTTY); } out: -- 1.7.9.5