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[v3,07/23] staging/rdma/hfi1: close shared context security hole

Message ID 1445869729-7507-8-git-send-email-ira.weiny@intel.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

Ira Weiny Oct. 26, 2015, 2:28 p.m. UTC 
From: Jareer Abdel-Qader <jareer.h.abdel-qader@intel.com>

Driver does not verify userid for shared context assignments, allowing
malicious user access.

Reviewed by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Jareer H Abdel-Qader <jareer.h.abdel-qader@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 drivers/staging/rdma/hfi1/file_ops.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/staging/rdma/hfi1/file_ops.c b/drivers/staging/rdma/hfi1/file_ops.c
index cbaf4f734add..955f80dfecf6 100644
--- a/drivers/staging/rdma/hfi1/file_ops.c
+++ b/drivers/staging/rdma/hfi1/file_ops.c
@@ -948,6 +948,7 @@  static int find_shared_ctxt(struct file *fp,
 			/* Skip ctxt if it doesn't match the requested one */
 			if (memcmp(uctxt->uuid, uinfo->uuid,
 				   sizeof(uctxt->uuid)) ||
+			    uctxt->jkey != generate_jkey(current_uid()) ||
 			    uctxt->subctxt_id != uinfo->subctxt_id ||
 			    uctxt->subctxt_cnt != uinfo->subctxt_cnt)
 				continue;