6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: P Praneesh quic_ppranees@quicinc.com
commit 63fdc4509bcf483e79548de6bc08bf3c8e504bb3 upstream.
Currently, ath12k_dp_mon_srng_process uses ath12k_hal_srng_src_get_next_entry to fetch the next entry from the destination ring. This is incorrect because ath12k_hal_srng_src_get_next_entry is intended for source rings, not destination rings. This leads to invalid entry fetches, causing potential data corruption or crashes due to accessing incorrect memory locations. This happens because the source ring and destination ring have different handling mechanisms and using the wrong function results in incorrect pointer arithmetic and ring management.
To fix this issue, replace the call to ath12k_hal_srng_src_get_next_entry with ath12k_hal_srng_dst_get_next_entry in ath12k_dp_mon_srng_process. This ensures that the correct function is used for fetching entries from the destination ring, preventing invalid memory accesses.
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1 Tested-on: WCN7850 hw2.0 WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
Signed-off-by: P Praneesh quic_ppranees@quicinc.com Link: https://patch.msgid.link/20241223060132.3506372-7-quic_ppranees@quicinc.com Signed-off-by: Jeff Johnson jeff.johnson@oss.qualcomm.com Signed-off-by: Alexander Tsoy alexander@tsoy.me Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/wireless/ath/ath12k/dp_mon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/ath/ath12k/dp_mon.c +++ b/drivers/net/wireless/ath/ath12k/dp_mon.c @@ -2118,7 +2118,7 @@ int ath12k_dp_mon_srng_process(struct at dest_idx = 0; move_next: ath12k_dp_mon_buf_replenish(ab, buf_ring, 1); - ath12k_hal_srng_src_get_next_entry(ab, srng); + ath12k_hal_srng_dst_get_next_entry(ab, srng); num_buffs_reaped++; }