There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use "flexible array members"[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. This helps with the ongoing efforts to globally enable -Warray-bounds and get us closer to being able to tighten the FORTIFY_SOURCE routines on memcpy(). [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays Link: https://github.com/KSPP/linux/issues/78 Link: https://github.com/KSPP/linux/issues/180 Suggested-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> Signed-off-by: Stephen Kitt <steve@xxxxxxx> --- include/sound/sof/topology.h | 2 +- sound/soc/sof/topology.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/sound/sof/topology.h b/include/sound/sof/topology.h index d12736e14b69..adee6afd1490 100644 --- a/include/sound/sof/topology.h +++ b/include/sound/sof/topology.h @@ -237,7 +237,7 @@ struct sof_ipc_comp_process { /* reserved for future use */ uint32_t reserved[7]; - uint8_t data[0]; + uint8_t data[]; } __packed; /* frees components, buffers and pipelines diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c index e72dcae5e7ee..1d119d1dd69d 100644 --- a/sound/soc/sof/topology.c +++ b/sound/soc/sof/topology.c @@ -2164,7 +2164,7 @@ static int sof_process_load(struct snd_soc_component *scomp, int index, */ if (ipc_data_size) { for (i = 0; i < widget->num_kcontrols; i++) { - memcpy(&process->data + offset, + memcpy(&process->data[offset], wdata[i].pdata->data, wdata[i].pdata->size); offset += wdata[i].pdata->size; base-commit: f71077a4d84bbe8c7b91b7db7c4ef815755ac5e3 -- 2.27.0
