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authorMark Bloch <markb@mellanox.com>2016-10-27 16:36:31 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-26 09:54:54 +0100
commiteba83a85cabaaee02b25edfa19f85c4de73a5165 (patch)
tree455f8a89afba046f7032b93b9c356cf126c42ae5
parentc524185c81d426d739d9534488684322dc1ec1a8 (diff)
downloadlinux-linaro-stable-eba83a85cabaaee02b25edfa19f85c4de73a5165.tar.gz
IB/core: Avoid unsigned int overflow in sg_alloc_table
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@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>
-rw-r--r--drivers/infiniband/core/umem.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index 38acb3cfc545..04f3c0db9126 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -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;
}