| commit | 54e02162d4454a99227f520948bf4494c3d972d0 | [log] [tgz] |
|---|---|---|
| author | Jason Wang <jasowang@redhat.com> | Sun Feb 11 11:28:12 2018 +0800 |
| committer | David S. Miller <davem@davemloft.net> | Sun Feb 11 22:33:22 2018 -0500 |
| tree | 47f1ac2164f0f61abb6e55ff4e8f9142ac6e2ba1 | |
| parent | 7928b2cbe55b2a410a0f5c1f154610059c57b1b2 [diff] |
ptr_ring: prevent integer overflow when calculating size
Switch to use dividing to prevent integer overflow when size is too
big to calculate allocation size properly.
Reported-by: Eric Biggers <ebiggers3@gmail.com>
Fixes: 6e6e41c31122 ("ptr_ring: fail early if queue occupies more than KMALLOC_MAX_SIZE")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>