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Commit ca2f30a0 authored Jun 09, 2016 by Ira Weiny Committed by Doug Ledford Jun 17, 2016

IB/hfi1: Prevent context loss



If a context has already been assigned to an FD, prevent
another assignment.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

parent c3c64a95

drivers/infiniband/hw/hfi1/file_ops.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -203,6 +203,9 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,

	switch (cmd) {		switch (cmd) {
	case HFI1_IOCTL_ASSIGN_CTXT:		case HFI1_IOCTL_ASSIGN_CTXT:
			if (uctxt)
			return -EINVAL;

	if (copy_from_user(&uinfo,		if (copy_from_user(&uinfo,
	(struct hfi1_user_info __user *)arg,		(struct hfi1_user_info __user *)arg,
	sizeof(uinfo)))		sizeof(uinfo)))