wifi: ath12k: Decrement TID on RX peer frag setup error handling

[ Upstream commit 7c0884fcd2ddde0544d2e77f297ae461e1f53f58 ]

Currently, TID is not decremented before peer cleanup, during error
handling path of ath12k_dp_rx_peer_frag_setup(). This could lead to
out-of-bounds access in peer->rx_tid[].

Hence, add a decrement operation for TID, before peer cleanup to
ensures proper cleanup and prevents out-of-bounds access issues when
the RX peer frag setup fails.

Found during code review. Compile tested only.

Signed-off-by: Karthikeyan Kathirvel <quic_kathirve@quicinc.com>
Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Link: https://patch.msgid.link/20250526034713.712592-1-quic_sarishar@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/wireless/ath/ath12k/dp.c b/drivers/net/wireless/ath/ath12k/dp.c
index cfb17f16b0817738ad4b48f7ec41c9fcfa9a79f4..3244f7c3ca4f1ac573887dcb9ff314663eff077e 100644 (file)
--- a/drivers/net/wireless/ath/ath12k/dp.c
+++ b/drivers/net/wireless/ath/ath12k/dp.c
@@ -79,6 +79,7 @@ int ath12k_dp_peer_setup(struct ath12k *ar, int vdev_id, const u8 *addr)
        ret = ath12k_dp_rx_peer_frag_setup(ar, addr, vdev_id);
        if (ret) {
                ath12k_warn(ab, "failed to setup rx defrag context\n");
+               tid--;
                goto peer_clean;
        }