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(parent: 7928b2c) | patch
ptr_ring: prevent integer overflow when calculating size
authorJason Wang <jasowang@redhat.com>
Sun, 11 Feb 2018 03:28:12 +0000 (11:28 +0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 12 Feb 2018 03:33:22 +0000 (22:33 -0500)
commit54e02162d4454a99227f520948bf4494c3d972d0
tree47f1ac2164f0f61abb6e55ff4e8f9142ac6e2ba1tree | snapshot
parent7928b2cbe55b2a410a0f5c1f154610059c57b1b2commit | 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>
include/linux/ptr_ring.h diff | blob | history
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