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16660db3fc
Fix the following out-of-bounds warnings by embedding existing struct
htb_rel_query into struct mpt3_addnl_diag_query, instead of duplicating its
members:
include/linux/fortify-string.h:20:29: warning: '__builtin_memcpy' offset [19, 32] from the object at 'karg' is out of the bounds of referenced subobject 'buffer_rel_condition' with type 'short unsigned int' at offset 16 [-Warray-bounds]
include/linux/fortify-string.h:22:29: warning: '__builtin_memset' offset [19, 32] from the object at 'karg' is out of the bounds of referenced subobject 'buffer_rel_condition' with type 'short unsigned int' at offset 16 [-Warray-bounds]
The problem is that the original code is trying to copy data into a bunch
of struct members adjacent to each other in a single call to memcpy(). All
those members are exactly the same contained in struct htb_rel_query, so
instead of duplicating them into struct mpt3_addnl_diag_query, replace them
with new member rel_query of type struct htb_rel_query. So, now that this
new object is introduced, memcpy() doesn't overrun the length of
&karg.buffer_rel_condition, because the address of the new struct object
_rel_query_ is used as destination, instead. The same issue is present when
calling memset(), and it is fixed with this same approach.
Below is a comparison of struct mpt3_addnl_diag_query, before and after
this change (the size and cachelines remain the same):
$ pahole -C mpt3_addnl_diag_query drivers/scsi/mpt3sas/mpt3sas_ctl.o
struct mpt3_addnl_diag_query {
struct mpt3_ioctl_header hdr; /* 0 12 */
uint32_t unique_id; /* 12 4 */
uint16_t buffer_rel_condition; /* 16 2 */
uint16_t reserved1; /* 18 2 */
uint32_t trigger_type; /* 20 4 */
uint32_t trigger_info_dwords[2]; /* 24 8 */
uint32_t reserved2[2]; /* 32 8 */
/* size: 40, cachelines: 1, members: 7 */
/* last cacheline: 40 bytes */
};
$ pahole -C mpt3_addnl_diag_query drivers/scsi/mpt3sas/mpt3sas_ctl.o
struct mpt3_addnl_diag_query {
struct mpt3_ioctl_header hdr; /* 0 12 */
uint32_t unique_id; /* 12 4 */
struct htb_rel_query rel_query; /* 16 16 */
uint32_t reserved2[2]; /* 32 8 */
/* size: 40, cachelines: 1, members: 4 */
/* last cacheline: 40 bytes */
};
Also, this helps with the ongoing efforts to globally enable -Warray-bounds
and get us closer to being able to tighten the FORTIFY_SOURCE routines on
memcpy().
Link: https://github.com/KSPP/linux/issues/109
Link: https://lore.kernel.org/lkml/60659889.bJJILx2THu3hlpxW%25lkp@intel.com/
Link: https://lore.kernel.org/r/20210401162054.GA397186@embeddedor
Build-tested-by: kernel test robot <lkp@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
452 lines
14 KiB
C
452 lines
14 KiB
C
/*
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* Management Module Support for MPT (Message Passing Technology) based
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* controllers
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*
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* This code is based on drivers/scsi/mpt3sas/mpt3sas_ctl.h
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* Copyright (C) 2012-2014 LSI Corporation
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* Copyright (C) 2013-2014 Avago Technologies
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* (mailto: MPT-FusionLinux.pdl@avagotech.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* NO WARRANTY
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* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
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* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
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* solely responsible for determining the appropriateness of using and
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* distributing the Program and assumes all risks associated with its
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* exercise of rights under this Agreement, including but not limited to
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* the risks and costs of program errors, damage to or loss of data,
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* programs or equipment, and unavailability or interruption of operations.
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* DISCLAIMER OF LIABILITY
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* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
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* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*/
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#ifndef MPT3SAS_CTL_H_INCLUDED
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#define MPT3SAS_CTL_H_INCLUDED
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#ifdef __KERNEL__
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#include <linux/miscdevice.h>
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#endif
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#include "mpt3sas_base.h"
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#ifndef MPT2SAS_MINOR
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#define MPT2SAS_MINOR (MPT_MINOR + 1)
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#endif
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#ifndef MPT3SAS_MINOR
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#define MPT3SAS_MINOR (MPT_MINOR + 2)
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#endif
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#define MPT2SAS_DEV_NAME "mpt2ctl"
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#define MPT3SAS_DEV_NAME "mpt3ctl"
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#define MPT3_MAGIC_NUMBER 'L'
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#define MPT3_IOCTL_DEFAULT_TIMEOUT (10) /* in seconds */
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/**
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* IOCTL opcodes
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*/
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#define MPT3IOCINFO _IOWR(MPT3_MAGIC_NUMBER, 17, \
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struct mpt3_ioctl_iocinfo)
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#define MPT3COMMAND _IOWR(MPT3_MAGIC_NUMBER, 20, \
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struct mpt3_ioctl_command)
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#ifdef CONFIG_COMPAT
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#define MPT3COMMAND32 _IOWR(MPT3_MAGIC_NUMBER, 20, \
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struct mpt3_ioctl_command32)
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#endif
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#define MPT3EVENTQUERY _IOWR(MPT3_MAGIC_NUMBER, 21, \
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struct mpt3_ioctl_eventquery)
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#define MPT3EVENTENABLE _IOWR(MPT3_MAGIC_NUMBER, 22, \
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struct mpt3_ioctl_eventenable)
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#define MPT3EVENTREPORT _IOWR(MPT3_MAGIC_NUMBER, 23, \
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struct mpt3_ioctl_eventreport)
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#define MPT3HARDRESET _IOWR(MPT3_MAGIC_NUMBER, 24, \
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struct mpt3_ioctl_diag_reset)
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#define MPT3BTDHMAPPING _IOWR(MPT3_MAGIC_NUMBER, 31, \
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struct mpt3_ioctl_btdh_mapping)
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/* diag buffer support */
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#define MPT3DIAGREGISTER _IOWR(MPT3_MAGIC_NUMBER, 26, \
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struct mpt3_diag_register)
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#define MPT3DIAGRELEASE _IOWR(MPT3_MAGIC_NUMBER, 27, \
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struct mpt3_diag_release)
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#define MPT3DIAGUNREGISTER _IOWR(MPT3_MAGIC_NUMBER, 28, \
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struct mpt3_diag_unregister)
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#define MPT3DIAGQUERY _IOWR(MPT3_MAGIC_NUMBER, 29, \
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struct mpt3_diag_query)
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#define MPT3DIAGREADBUFFER _IOWR(MPT3_MAGIC_NUMBER, 30, \
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struct mpt3_diag_read_buffer)
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#define MPT3ADDNLDIAGQUERY _IOWR(MPT3_MAGIC_NUMBER, 32, \
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struct mpt3_addnl_diag_query)
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/* Trace Buffer default UniqueId */
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#define MPT2DIAGBUFFUNIQUEID (0x07075900)
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#define MPT3DIAGBUFFUNIQUEID (0x4252434D)
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/* UID not found */
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#define MPT3_DIAG_UID_NOT_FOUND (0xFF)
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/**
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* struct mpt3_ioctl_header - main header structure
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* @ioc_number - IOC unit number
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* @port_number - IOC port number
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* @max_data_size - maximum number bytes to transfer on read
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*/
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struct mpt3_ioctl_header {
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uint32_t ioc_number;
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uint32_t port_number;
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uint32_t max_data_size;
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};
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/**
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* struct mpt3_ioctl_diag_reset - diagnostic reset
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* @hdr - generic header
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*/
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struct mpt3_ioctl_diag_reset {
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struct mpt3_ioctl_header hdr;
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};
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/**
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* struct mpt3_ioctl_pci_info - pci device info
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* @device - pci device id
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* @function - pci function id
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* @bus - pci bus id
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* @segment_id - pci segment id
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*/
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struct mpt3_ioctl_pci_info {
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union {
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struct {
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uint32_t device:5;
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uint32_t function:3;
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uint32_t bus:24;
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} bits;
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uint32_t word;
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} u;
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uint32_t segment_id;
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};
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#define MPT2_IOCTL_INTERFACE_SCSI (0x00)
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#define MPT2_IOCTL_INTERFACE_FC (0x01)
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#define MPT2_IOCTL_INTERFACE_FC_IP (0x02)
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#define MPT2_IOCTL_INTERFACE_SAS (0x03)
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#define MPT2_IOCTL_INTERFACE_SAS2 (0x04)
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#define MPT2_IOCTL_INTERFACE_SAS2_SSS6200 (0x05)
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#define MPT3_IOCTL_INTERFACE_SAS3 (0x06)
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#define MPT3_IOCTL_INTERFACE_SAS35 (0x07)
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#define MPT2_IOCTL_VERSION_LENGTH (32)
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/**
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* struct mpt3_ioctl_iocinfo - generic controller info
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* @hdr - generic header
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* @adapter_type - type of adapter (spi, fc, sas)
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* @port_number - port number
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* @pci_id - PCI Id
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* @hw_rev - hardware revision
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* @sub_system_device - PCI subsystem Device ID
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* @sub_system_vendor - PCI subsystem Vendor ID
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* @rsvd0 - reserved
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* @firmware_version - firmware version
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* @bios_version - BIOS version
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* @driver_version - driver version - 32 ASCII characters
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* @rsvd1 - reserved
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* @scsi_id - scsi id of adapter 0
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* @rsvd2 - reserved
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* @pci_information - pci info (2nd revision)
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*/
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struct mpt3_ioctl_iocinfo {
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struct mpt3_ioctl_header hdr;
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uint32_t adapter_type;
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uint32_t port_number;
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uint32_t pci_id;
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uint32_t hw_rev;
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uint32_t subsystem_device;
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uint32_t subsystem_vendor;
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uint32_t rsvd0;
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uint32_t firmware_version;
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uint32_t bios_version;
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uint8_t driver_version[MPT2_IOCTL_VERSION_LENGTH];
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uint8_t rsvd1;
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uint8_t scsi_id;
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uint16_t rsvd2;
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struct mpt3_ioctl_pci_info pci_information;
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};
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/* number of event log entries */
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#define MPT3SAS_CTL_EVENT_LOG_SIZE (200)
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/**
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* struct mpt3_ioctl_eventquery - query event count and type
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* @hdr - generic header
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* @event_entries - number of events returned by get_event_report
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* @rsvd - reserved
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* @event_types - type of events currently being captured
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*/
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struct mpt3_ioctl_eventquery {
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struct mpt3_ioctl_header hdr;
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uint16_t event_entries;
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uint16_t rsvd;
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uint32_t event_types[MPI2_EVENT_NOTIFY_EVENTMASK_WORDS];
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};
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/**
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* struct mpt3_ioctl_eventenable - enable/disable event capturing
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* @hdr - generic header
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* @event_types - toggle off/on type of events to be captured
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*/
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struct mpt3_ioctl_eventenable {
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struct mpt3_ioctl_header hdr;
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uint32_t event_types[4];
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};
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#define MPT3_EVENT_DATA_SIZE (192)
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/**
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* struct MPT3_IOCTL_EVENTS -
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* @event - the event that was reported
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* @context - unique value for each event assigned by driver
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* @data - event data returned in fw reply message
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*/
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struct MPT3_IOCTL_EVENTS {
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uint32_t event;
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uint32_t context;
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uint8_t data[MPT3_EVENT_DATA_SIZE];
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};
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/**
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* struct mpt3_ioctl_eventreport - returing event log
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* @hdr - generic header
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* @event_data - (see struct MPT3_IOCTL_EVENTS)
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*/
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struct mpt3_ioctl_eventreport {
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struct mpt3_ioctl_header hdr;
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struct MPT3_IOCTL_EVENTS event_data[1];
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};
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/**
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* struct mpt3_ioctl_command - generic mpt firmware passthru ioctl
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* @hdr - generic header
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* @timeout - command timeout in seconds. (if zero then use driver default
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* value).
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* @reply_frame_buf_ptr - reply location
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* @data_in_buf_ptr - destination for read
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* @data_out_buf_ptr - data source for write
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* @sense_data_ptr - sense data location
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* @max_reply_bytes - maximum number of reply bytes to be sent to app.
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* @data_in_size - number bytes for data transfer in (read)
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* @data_out_size - number bytes for data transfer out (write)
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* @max_sense_bytes - maximum number of bytes for auto sense buffers
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* @data_sge_offset - offset in words from the start of the request message to
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* the first SGL
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* @mf[1];
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*/
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struct mpt3_ioctl_command {
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struct mpt3_ioctl_header hdr;
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uint32_t timeout;
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void __user *reply_frame_buf_ptr;
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void __user *data_in_buf_ptr;
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void __user *data_out_buf_ptr;
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void __user *sense_data_ptr;
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uint32_t max_reply_bytes;
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uint32_t data_in_size;
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uint32_t data_out_size;
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uint32_t max_sense_bytes;
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uint32_t data_sge_offset;
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uint8_t mf[1];
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};
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#ifdef CONFIG_COMPAT
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struct mpt3_ioctl_command32 {
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struct mpt3_ioctl_header hdr;
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uint32_t timeout;
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uint32_t reply_frame_buf_ptr;
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uint32_t data_in_buf_ptr;
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uint32_t data_out_buf_ptr;
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uint32_t sense_data_ptr;
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uint32_t max_reply_bytes;
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uint32_t data_in_size;
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uint32_t data_out_size;
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uint32_t max_sense_bytes;
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uint32_t data_sge_offset;
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uint8_t mf[1];
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};
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#endif
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/**
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* struct mpt3_ioctl_btdh_mapping - mapping info
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* @hdr - generic header
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* @id - target device identification number
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* @bus - SCSI bus number that the target device exists on
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* @handle - device handle for the target device
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* @rsvd - reserved
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*
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* To obtain a bus/id the application sets
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* handle to valid handle, and bus/id to 0xFFFF.
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*
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* To obtain the device handle the application sets
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* bus/id valid value, and the handle to 0xFFFF.
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*/
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struct mpt3_ioctl_btdh_mapping {
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struct mpt3_ioctl_header hdr;
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uint32_t id;
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uint32_t bus;
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uint16_t handle;
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uint16_t rsvd;
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};
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/* application flags for mpt3_diag_register, mpt3_diag_query */
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#define MPT3_APP_FLAGS_APP_OWNED (0x0001)
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#define MPT3_APP_FLAGS_BUFFER_VALID (0x0002)
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#define MPT3_APP_FLAGS_FW_BUFFER_ACCESS (0x0004)
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#define MPT3_APP_FLAGS_DYNAMIC_BUFFER_ALLOC (0x0008)
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/* flags for mpt3_diag_read_buffer */
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#define MPT3_FLAGS_REREGISTER (0x0001)
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#define MPT3_PRODUCT_SPECIFIC_DWORDS 23
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/**
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* struct mpt3_diag_register - application register with driver
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* @hdr - generic header
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* @reserved -
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* @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
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* @application_flags - misc flags
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* @diagnostic_flags - specifies flags affecting command processing
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* @product_specific - product specific information
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* @requested_buffer_size - buffers size in bytes
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* @unique_id - tag specified by application that is used to signal ownership
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* of the buffer.
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*
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* This will allow the driver to setup any required buffers that will be
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* needed by firmware to communicate with the driver.
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*/
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struct mpt3_diag_register {
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struct mpt3_ioctl_header hdr;
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uint8_t reserved;
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uint8_t buffer_type;
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uint16_t application_flags;
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uint32_t diagnostic_flags;
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uint32_t product_specific[MPT3_PRODUCT_SPECIFIC_DWORDS];
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uint32_t requested_buffer_size;
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uint32_t unique_id;
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};
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/**
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* struct mpt3_diag_unregister - application unregister with driver
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* @hdr - generic header
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* @unique_id - tag uniquely identifies the buffer to be unregistered
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*
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* This will allow the driver to cleanup any memory allocated for diag
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* messages and to free up any resources.
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*/
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struct mpt3_diag_unregister {
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struct mpt3_ioctl_header hdr;
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uint32_t unique_id;
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};
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/**
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* struct mpt3_diag_query - query relevant info associated with diag buffers
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* @hdr - generic header
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* @reserved -
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* @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
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* @application_flags - misc flags
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* @diagnostic_flags - specifies flags affecting command processing
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* @product_specific - product specific information
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* @total_buffer_size - diag buffer size in bytes
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* @driver_added_buffer_size - size of extra space appended to end of buffer
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* @unique_id - unique id associated with this buffer.
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*
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* The application will send only buffer_type and unique_id. Driver will
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* inspect unique_id first, if valid, fill in all the info. If unique_id is
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* 0x00, the driver will return info specified by Buffer Type.
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*/
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struct mpt3_diag_query {
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struct mpt3_ioctl_header hdr;
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uint8_t reserved;
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uint8_t buffer_type;
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uint16_t application_flags;
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uint32_t diagnostic_flags;
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uint32_t product_specific[MPT3_PRODUCT_SPECIFIC_DWORDS];
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uint32_t total_buffer_size;
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uint32_t driver_added_buffer_size;
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uint32_t unique_id;
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};
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/**
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* struct mpt3_diag_release - request to send Diag Release Message to firmware
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* @hdr - generic header
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* @unique_id - tag uniquely identifies the buffer to be released
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*
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* This allows ownership of the specified buffer to returned to the driver,
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* allowing an application to read the buffer without fear that firmware is
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* overwriting information in the buffer.
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*/
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struct mpt3_diag_release {
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struct mpt3_ioctl_header hdr;
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uint32_t unique_id;
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};
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/**
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* struct mpt3_diag_read_buffer - request for copy of the diag buffer
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* @hdr - generic header
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* @status -
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* @reserved -
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* @flags - misc flags
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* @starting_offset - starting offset within drivers buffer where to start
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* reading data at into the specified application buffer
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* @bytes_to_read - number of bytes to copy from the drivers buffer into the
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* application buffer starting at starting_offset.
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* @unique_id - unique id associated with this buffer.
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* @diagnostic_data - data payload
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*/
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struct mpt3_diag_read_buffer {
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struct mpt3_ioctl_header hdr;
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uint8_t status;
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uint8_t reserved;
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uint16_t flags;
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uint32_t starting_offset;
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uint32_t bytes_to_read;
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uint32_t unique_id;
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uint32_t diagnostic_data[1];
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};
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/**
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* struct mpt3_addnl_diag_query - diagnostic buffer release reason
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* @hdr - generic header
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* @unique_id - unique id associated with this buffer.
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* @rel_query - release query.
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|
* @reserved2
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|
*/
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struct mpt3_addnl_diag_query {
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struct mpt3_ioctl_header hdr;
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uint32_t unique_id;
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struct htb_rel_query rel_query;
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uint32_t reserved2[2];
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};
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#endif /* MPT3SAS_CTL_H_INCLUDED */
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