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ksmbd: smbd: change the return value of get_sg_list

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Make get_sg_list return EINVAL if there aren't
mapped scatterlists.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Hyunchul Lee 2022-04-30 08:30:28 +09:00 committed by Steve French
parent 11659a8ddb
commit 4e3edd0092
1 changed files with 2 additions and 2 deletions
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4
fs/ksmbd/transport_rdma.c
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@ -1079,7 +1079,7 @@ static int get_sg_list(void *buf, int size, struct scatterlist *sg_list, int nen
int offset, len; int offset, len;
int i = 0; int i = 0;
if (nentries < get_buf_page_count(buf, size)) if (size <= 0 || nentries < get_buf_page_count(buf, size))
return -EINVAL; return -EINVAL;
offset = offset_in_page(buf); offset = offset_in_page(buf);
@ -1111,7 +1111,7 @@ static int get_mapped_sg_list(struct ib_device *device, void *buf, int size,
int npages; int npages;
npages = get_sg_list(buf, size, sg_list, nentries); npages = get_sg_list(buf, size, sg_list, nentries);
if (npages <= 0) if (npages < 0)
return -EINVAL; return -EINVAL;
return ib_dma_map_sg(device, sg_list, npages, dir); return ib_dma_map_sg(device, sg_list, npages, dir);
} }