[PATCH ath-next] wifi: ath12k: Avoid buffer overread in ath12k_wmi_op_rx()

[Rameshkumar Sundaram]

On 7/17/2026 1:31 AM, Jeff Johnson wrote:
> Currently, in ath12k_wmi_op_rx(), the firmware buffer is read without
> first verifying that the buffer has enough data to hold a header. This
> could result in a buffer overread.
> 
> Update the logic to verify the buffer contains at least enough data to
> hold a wmi_cmd_hdr before reading from the buffer.
> 
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3
> 
> Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices")
> Assisted-by: Claude:claude-sonnet-4-6
> Signed-off-by: Jeff Johnson <jeff.johnson at oss.qualcomm.com>
Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram at oss.qualcomm.com>