diff mbox series

[v3,15/19] net/dpaa: fix bitmask truncation

Message ID 20250205162448.161161-16-stephen@networkplumber.org (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers
Series minor fixes from PVS studio bug list |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Stephen Hemminger Feb. 5, 2025, 4:23 p.m. UTC 
The dqrr_held mask is 64 bit but updates were getting truncated
because 1 is of type int (32 bit) and the result shift of int is of
type int (32 bit); therefore any value >= 32 would get truncated.

Link: https://pvs-studio.com/en/blog/posts/cpp/1183/

Fixes: 5e7455931442 ("net/dpaa: support Rx queue configurations with eventdev")
Cc: sunil.kori@nxp.com
Cc: stable@dpdk.org

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
---
 drivers/net/dpaa/dpaa_rxtx.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dpaa/dpaa_rxtx.c b/drivers/net/dpaa/dpaa_rxtx.c
index 247e7b92ba..05bd73becf 100644
--- a/drivers/net/dpaa/dpaa_rxtx.c
+++ b/drivers/net/dpaa/dpaa_rxtx.c
@@ -842,7 +842,7 @@  dpaa_rx_cb_atomic(void *event,
 	/* Save active dqrr entries */
 	index = DQRR_PTR2IDX(dqrr);
 	DPAA_PER_LCORE_DQRR_SIZE++;
-	DPAA_PER_LCORE_DQRR_HELD |= 1 << index;
+	DPAA_PER_LCORE_DQRR_HELD |= UINT64_C(1) << index;
 	DPAA_PER_LCORE_DQRR_MBUF(index) = mbuf;
 	ev->impl_opaque = index + 1;
 	*dpaa_seqn(mbuf) = (uint32_t)index + 1;
@@ -1338,13 +1338,12 @@  dpaa_eth_queue_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 			seqn = *dpaa_seqn(mbuf);
 			if (seqn != DPAA_INVALID_MBUF_SEQN) {
 				index = seqn - 1;
-				if (DPAA_PER_LCORE_DQRR_HELD & (1 << index)) {
+				if (DPAA_PER_LCORE_DQRR_HELD & (UINT64_C(1) << index)) {
 					flags[loop] =
 					   ((index & QM_EQCR_DCA_IDXMASK) << 8);
 					flags[loop] |= QMAN_ENQUEUE_FLAG_DCA;
 					DPAA_PER_LCORE_DQRR_SIZE--;
-					DPAA_PER_LCORE_DQRR_HELD &=
-								~(1 << index);
+					DPAA_PER_LCORE_DQRR_HELD &= ~(UINT64_C(1) << index);
 				}
 			}