Commit 8c9edf63 authored by Allen Hubbe's avatar Allen Hubbe Committed by Jon Mason

NTB: Fix zero size or integer overflow in ntb_set_mw

A plain 32 bit integer will overflow for values over 4GiB.

Change the plain integer size to the appropriate size type in
ntb_set_mw.  Change the type of the size parameter and two local
variables used for size.

Even if there is no overflow, a size of zero is invalid here.
Reported-by: default avatarJuyoung Jung <jjung@micron.com>
Signed-off-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
parent 8b5a22d8
......@@ -629,13 +629,16 @@ static void ntb_free_mw(struct ntb_transport_ctx *nt, int num_mw)
}
static int ntb_set_mw(struct ntb_transport_ctx *nt, int num_mw,
unsigned int size)
resource_size_t size)
{
struct ntb_transport_mw *mw = &nt->mw_vec[num_mw];
struct pci_dev *pdev = nt->ndev->pdev;
unsigned int xlat_size, buff_size;
size_t xlat_size, buff_size;
int rc;
if (!size)
return -EINVAL;
xlat_size = round_up(size, mw->xlat_align_size);
buff_size = round_up(size, mw->xlat_align);
......@@ -655,7 +658,7 @@ static int ntb_set_mw(struct ntb_transport_ctx *nt, int num_mw,
if (!mw->virt_addr) {
mw->xlat_size = 0;
mw->buff_size = 0;
dev_err(&pdev->dev, "Unable to alloc MW buff of size %d\n",
dev_err(&pdev->dev, "Unable to alloc MW buff of size %zu\n",
buff_size);
return -ENOMEM;
}
......
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