Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: prevent userspace from accessing shut down devices ieee1394: sbp2: use correct size of command descriptor block
This commit is contained in:
commit
c110a2bd82
2 changed files with 22 additions and 12 deletions
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@ -113,6 +113,11 @@ static int fw_device_op_open(struct inode *inode, struct file *file)
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if (device == NULL)
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return -ENODEV;
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if (fw_device_is_shutdown(device)) {
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fw_device_put(device);
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return -ENODEV;
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}
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client = kzalloc(sizeof(*client), GFP_KERNEL);
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if (client == NULL) {
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fw_device_put(device);
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@ -901,6 +906,9 @@ fw_device_op_ioctl(struct file *file,
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{
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struct client *client = file->private_data;
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if (fw_device_is_shutdown(client->device))
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return -ENODEV;
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return dispatch_ioctl(client, cmd, (void __user *) arg);
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}
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@ -911,6 +919,9 @@ fw_device_op_compat_ioctl(struct file *file,
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{
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struct client *client = file->private_data;
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if (fw_device_is_shutdown(client->device))
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return -ENODEV;
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return dispatch_ioctl(client, cmd, compat_ptr(arg));
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}
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#endif
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@ -922,6 +933,9 @@ static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
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unsigned long size;
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int page_count, retval;
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if (fw_device_is_shutdown(client->device))
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return -ENODEV;
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/* FIXME: We could support multiple buffers, but we don't. */
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if (client->buffer.pages != NULL)
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return -EBUSY;
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@ -1539,15 +1539,13 @@ static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
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static void sbp2_create_command_orb(struct sbp2_lu *lu,
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struct sbp2_command_info *cmd,
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unchar *scsi_cmd,
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unsigned int scsi_use_sg,
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unsigned int scsi_request_bufflen,
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struct scatterlist *sg,
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enum dma_data_direction dma_dir)
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struct scsi_cmnd *SCpnt)
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{
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struct sbp2_fwhost_info *hi = lu->hi;
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struct sbp2_command_orb *orb = &cmd->command_orb;
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u32 orb_direction;
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unsigned int scsi_request_bufflen = scsi_bufflen(SCpnt);
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enum dma_data_direction dma_dir = SCpnt->sc_data_direction;
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/*
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* Set-up our command ORB.
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@ -1580,13 +1578,14 @@ static void sbp2_create_command_orb(struct sbp2_lu *lu,
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orb->data_descriptor_lo = 0x0;
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orb->misc |= ORB_SET_DIRECTION(1);
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} else
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sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sg,
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sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_sg_count(SCpnt),
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scsi_sglist(SCpnt),
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orb_direction, dma_dir);
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sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
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memset(orb->cdb, 0, 12);
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memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
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memset(orb->cdb, 0, sizeof(orb->cdb));
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memcpy(orb->cdb, SCpnt->cmnd, SCpnt->cmd_len);
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}
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static void sbp2_link_orb_command(struct sbp2_lu *lu,
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@ -1669,16 +1668,13 @@ static void sbp2_link_orb_command(struct sbp2_lu *lu,
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static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
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void (*done)(struct scsi_cmnd *))
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{
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unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
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struct sbp2_command_info *cmd;
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cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
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if (!cmd)
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return -EIO;
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sbp2_create_command_orb(lu, cmd, scsi_cmd, scsi_sg_count(SCpnt),
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scsi_bufflen(SCpnt), scsi_sglist(SCpnt),
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SCpnt->sc_data_direction);
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sbp2_create_command_orb(lu, cmd, SCpnt);
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sbp2_link_orb_command(lu, cmd);
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return 0;
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