From: Clement Leger <cleger@xxxxxxxxx> commit 00a0eec59ddbb1ce966b19097d8a8d2f777e726a upstream. Index of rvring is computed using pointer arithmetic. However, since rvring->rvdev->vring is the base of the vring array, computation of rvring idx should be reversed. It previously lead to writing at negative indices in the resource table. Signed-off-by: Clement Leger <cleger@xxxxxxxxx> Link: https://lore.kernel.org/r/20191004073736.8327-1-cleger@xxxxxxxxx Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> Cc: Doug Anderson <dianders@xxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/remoteproc/remoteproc_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -284,7 +284,7 @@ void rproc_free_vring(struct rproc_vring { int size = PAGE_ALIGN(vring_size(rvring->len, rvring->align)); struct rproc *rproc = rvring->rvdev->rproc; - int idx = rvring->rvdev->vring - rvring; + int idx = rvring - rvring->rvdev->vring; struct fw_rsc_vdev *rsc; dma_free_coherent(rproc->dev.parent, size, rvring->va, rvring->dma);
