Use the correct kmap()/kunmap() flow to determine page
address used for CRC computation. Using page_address()
is wrong, since page might be in highmem.
Reported-by: Krishnamraju Eraparaju <krishna2@xxxxxxxxxxx>
Fixes: b9be6f18cf9e rdma/siw: transmit path
Signed-off-by: Bernard Metzler <bmt@xxxxxxxxxxxxxx>
---
drivers/infiniband/sw/siw/siw_qp_tx.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c
index 438a2917a47c..8e72f955921d 100644
--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
@@ -518,11 +518,12 @@ static int siw_tx_hdt(struct siw_iwarp_tx *c_tx, struct socket *s)
c_tx->mpa_crc_hd,
iov[seg].iov_base,
plen);
- } else if (do_crc)
- crypto_shash_update(
- c_tx->mpa_crc_hd,
- page_address(p) + fp_off,
- plen);
+ } else if (do_crc) {
+ crypto_shash_update(c_tx->mpa_crc_hd,
+ kmap(p) + fp_off,
+ plen);
+ kunmap(p);
+ }
} else {
u64 va = sge->laddr + sge_off;
--
2.17.2
