Patch "IB/core: Avoid unsigned int overflow in sg_alloc_table" has been added to the 4.8-stable tree

Patch "IB/core: Avoid unsigned int overflow in sg_alloc_table" has been added to the 4.8-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    IB/core: Avoid unsigned int overflow in sg_alloc_table

to the 4.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ib-core-avoid-unsigned-int-overflow-in-sg_alloc_table.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 3c7ba5760ab8eedec01159b267bb9bfcffe522ac Mon Sep 17 00:00:00 2001
From: Mark Bloch <markb@mellanox.com>
Date: Thu, 27 Oct 2016 16:36:31 +0300
Subject: IB/core: Avoid unsigned int overflow in sg_alloc_table

From: Mark Bloch <markb@mellanox.com>

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>

---
 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;
 	}


Patches currently in stable-queue which might be from markb@mellanox.com are

queue-4.8/ib-core-avoid-unsigned-int-overflow-in-sg_alloc_table.patch
queue-4.8/ib-mlx4-check-gid_index-return-value.patch
queue-4.8/ib-mlx5-fix-memory-leak-in-query-device.patch
queue-4.8/ib-cm-mark-stale-cm-id-s-whenever-the-mad-agent-was-unregistered.patch
queue-4.8/ib-mlx4-fix-create-cq-error-flow.patch