From: Clement Leger cleger@kalray.eu
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@kalray.eu Link: https://lore.kernel.org/r/20191004073736.8327-1-cleger@kalray.eu Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Cc: Doug Anderson dianders@chromium.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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 @@ -288,7 +288,7 @@ 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);