4.8-stable review patch. If anyone has any objections, please let me know.
------------------ From: Mark Bloch <[email protected]> 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 <[email protected]> Signed-off-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Doug Ledford <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- 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; }
