diff options
Diffstat (limited to 'drivers/scsi/mpt2sas/mpt2sas_ctl.c')
| -rw-r--r-- | drivers/scsi/mpt2sas/mpt2sas_ctl.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c index e92b77af5484..437c2d94c45a 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c +++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c @@ -116,7 +116,7 @@ _ctl_sas_device_find_by_handle(struct MPT2SAS_ADAPTER *ioc, u16 handle) * @mpi_reply: reply message frame * Context: none. * - * Function for displaying debug info helpfull when debugging issues + * Function for displaying debug info helpful when debugging issues * in this module. */ static void @@ -688,6 +688,13 @@ _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc, goto out; } + /* Check for overflow and wraparound */ + if (karg.data_sge_offset * 4 > ioc->request_sz || + karg.data_sge_offset > (UINT_MAX / 4)) { + ret = -EINVAL; + goto out; + } + /* copy in request message frame from user */ if (copy_from_user(mpi_request, mf, karg.data_sge_offset*4)) { printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__, __LINE__, @@ -1034,7 +1041,10 @@ _ctl_getiocinfo(void __user *arg) __func__)); memset(&karg, 0 , sizeof(karg)); - karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2; + if (ioc->is_warpdrive) + karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2_SSS6200; + else + karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2; if (ioc->pfacts) karg.port_number = ioc->pfacts[0].PortNumber; pci_read_config_byte(ioc->pdev, PCI_CLASS_REVISION, &revision); @@ -1963,7 +1973,7 @@ _ctl_diag_read_buffer(void __user *arg, enum block_state state) Mpi2DiagBufferPostReply_t *mpi_reply; int rc, i; u8 buffer_type; - unsigned long timeleft; + unsigned long timeleft, request_size, copy_size; u16 smid; u16 ioc_status; u8 issue_reset = 0; @@ -1999,6 +2009,8 @@ _ctl_diag_read_buffer(void __user *arg, enum block_state state) return -ENOMEM; } + request_size = ioc->diag_buffer_sz[buffer_type]; + if ((karg.starting_offset % 4) || (karg.bytes_to_read % 4)) { printk(MPT2SAS_ERR_FMT "%s: either the starting_offset " "or bytes_to_read are not 4 byte aligned\n", ioc->name, @@ -2006,13 +2018,23 @@ _ctl_diag_read_buffer(void __user *arg, enum block_state state) return -EINVAL; } + if (karg.starting_offset > request_size) + return -EINVAL; + diag_data = (void *)(request_data + karg.starting_offset); dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: diag_buffer(%p), " "offset(%d), sz(%d)\n", ioc->name, __func__, diag_data, karg.starting_offset, karg.bytes_to_read)); + /* Truncate data on requests that are too large */ + if ((diag_data + karg.bytes_to_read < diag_data) || + (diag_data + karg.bytes_to_read > request_data + request_size)) + copy_size = request_size - karg.starting_offset; + else + copy_size = karg.bytes_to_read; + if (copy_to_user((void __user *)uarg->diagnostic_data, - diag_data, karg.bytes_to_read)) { + diag_data, copy_size)) { printk(MPT2SAS_ERR_FMT "%s: Unable to write " "mpt_diag_read_buffer_t data @ %p\n", ioc->name, __func__, diag_data); |