4.8-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mark Bloch <markb@xxxxxxxxxxxx>
commit 3c7ba5760ab8eedec01159b267bb9bfcffe522ac upstream.
sg_alloc_table gets unsigned int as parameter while the driver
returns it as size_t. Check npages isn't greater than maximum
unsigned int.
Fixes: eeb8461e36c9 ("IB: Refactor umem to use linear SG table")
Signed-off-by: Mark Bloch <markb@xxxxxxxxxxxx>
Signed-off-by: Maor Gottlieb <maorg@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/core/umem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -174,7 +174,7 @@ struct ib_umem *ib_umem_get(struct ib_uc
cur_base = addr & PAGE_MASK;
- if (npages == 0) {
+ if (npages == 0 || npages > UINT_MAX) {
ret = -EINVAL;
goto out;
}
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