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IB/core: Avoid unsigned int overflow in sg_alloc_table

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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: eeb8461e36 ("IB: Refactor umem to use linear SG table")
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mark Bloch 2016-10-27 16:36:31 +03:00 • committed by Greg Kroah-Hartman
parent c524185c81
commit eba83a85ca
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/core/umem.c
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@ -175,7 +175,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
cur_base = addr & PAGE_MASK;
if (npages == 0) {
if (npages == 0 || npages > UINT_MAX) {
ret = -EINVAL;
goto out;
}