[for-next PATCH v5 01/11] RDMA/rxe: make sure requested access is a subset of {mr,mw}->access

Li Zhijian
2022-09-27T05:54:12Z

We should reject the requests with access flags that is not registered
by MR/MW. For example, lookup_mr() should return NULL when requested access
is 0x03 and mr->access is 0x01.

Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
drivers/infiniband/sw/rxe/rxe_mr.c | 2 +-
drivers/infiniband/sw/rxe/rxe_mw.c | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c
index 502e9ada99b3..74a38d06332f 100644
--- a/drivers/infiniband/sw/rxe/rxe_mr.c
+++ b/drivers/infiniband/sw/rxe/rxe_mr.c
@@ -511,7 +511,7 @@ struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 key,

if (unlikely((type == RXE_LOOKUP_LOCAL && mr->lkey != key) ||
(type == RXE_LOOKUP_REMOTE && mr->rkey != key) ||
- mr_pd(mr) != pd || (access && !(access & mr->access)) ||
+ mr_pd(mr) != pd || ((access & mr->access) != access) ||
mr->state != RXE_MR_STATE_VALID)) {
rxe_put(mr);
mr = NULL;
diff --git a/drivers/infiniband/sw/rxe/rxe_mw.c b/drivers/infiniband/sw/rxe/rxe_mw.c
index 902b7df7aaed..8df1c9066ed8 100644
--- a/drivers/infiniband/sw/rxe/rxe_mw.c
+++ b/drivers/infiniband/sw/rxe/rxe_mw.c
@@ -293,8 +293,7 @@ struct rxe_mw *rxe_lookup_mw(struct rxe_qp *qp, int access, u32 rkey)

if (unlikely((mw->rkey != rkey) || rxe_mw_pd(mw) != pd ||
(mw->ibmw.type == IB_MW_TYPE_2 && mw->qp != qp) ||
- (mw->length == 0) ||
- (access && !(access & mw->access)) ||
+ (mw->length == 0) || ((access & mw->access) != access) ||
mw->state != RXE_MW_STATE_VALID)) {
rxe_put(mw);
return NULL;
--
2.31.1