From: Hyunchul Lee <hyc.lee@xxxxxxxxx> [ Upstream commit 4e3edd0092704b25626a0fe60a974f6f382ff93d ] Make get_sg_list return EINVAL if there aren't mapped scatterlists. Signed-off-by: Hyunchul Lee <hyc.lee@xxxxxxxxx> Acked-by: Namjae Jeon <linkinjeon@xxxxxxxxxx> Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx> --- fs/ksmbd/transport_rdma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c index 02271ebf418a..ca853433e4b4 100644 --- a/fs/ksmbd/transport_rdma.c +++ b/fs/ksmbd/transport_rdma.c @@ -1085,7 +1085,7 @@ static int get_sg_list(void *buf, int size, struct scatterlist *sg_list, int nen int offset, len; int i = 0; - if (nentries < get_buf_page_count(buf, size)) + if (size <= 0 || nentries < get_buf_page_count(buf, size)) return -EINVAL; offset = offset_in_page(buf); @@ -1117,7 +1117,7 @@ static int get_mapped_sg_list(struct ib_device *device, void *buf, int size, int npages; npages = get_sg_list(buf, size, sg_list, nentries); - if (npages <= 0) + if (npages < 0) return -EINVAL; return ib_dma_map_sg(device, sg_list, npages, dir); } -- 2.25.1
