[PATCH V1 3/4] Security check on QP type

[Aleksey Senin <alex-192fA4vuk7xBDLzU/O5InQ@public.gmane.org>]

Check if user process has permission to create RAW_PACKET QP.

In order to prevent regular user from creating malicious packets, at the
time of QP creation, kernel will check if the process has necessary
permissions. This examination areis done in uverbs layer and is general
for all low level drivers.

Signed-off-by: Aleksey Senin <alekseys-smomgflXvOZWk0Htik3J/w@public.gmane.org>
---
 drivers/infiniband/core/uverbs_cmd.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 6fcfbeb..87025fc 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1050,6 +1050,9 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
 	if (copy_from_user(&cmd, buf, sizeof cmd))
 		return -EFAULT;
 
+	if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
+		return -EPERM;
+
 	INIT_UDATA(&udata, buf + sizeof cmd,
 		   (unsigned long) cmd.response + sizeof resp,
 		   in_len - sizeof cmd, out_len - sizeof resp);
-- 
1.6.4.2

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