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authorIra Weiny <ira.weiny@intel.com>2016-06-09 07:51:39 -0700
committerDoug Ledford <dledford@redhat.com>2016-06-17 20:11:26 -0400
commit5e9ef24619486213223053678eb9175630ef6bf9 (patch)
tree1a2b29c2d88c114c46437568bd3aea9763e35202 /drivers/infiniband
parentca2f30a0a6786e6b08eeb8abb2bbb8df58709d6e (diff)
downloadlinux-5e9ef24619486213223053678eb9175630ef6bf9.tar.bz2
IB/qib: 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>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/qib/qib_file_ops.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/qib/qib_file_ops.c b/drivers/infiniband/hw/qib/qib_file_ops.c
index ff946d5f59e4..382466a90da7 100644
--- a/drivers/infiniband/hw/qib/qib_file_ops.c
+++ b/drivers/infiniband/hw/qib/qib_file_ops.c
@@ -2178,6 +2178,11 @@ static ssize_t qib_write(struct file *fp, const char __user *data,
switch (cmd.type) {
case QIB_CMD_ASSIGN_CTXT:
+ if (rcd) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
ret = qib_assign_ctxt(fp, &cmd.cmd.user_info);
if (ret)
goto bail;