ptr_ring: prevent integer overflow when calculating size

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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: 6e6e41c311 ("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>

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Jason Wang 2018-02-11 11:28:12 +08:00 • committed by David S. Miller

parent 7928b2cbe5

commit 54e02162d4

1 changed files with 1 additions and 1 deletions

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include/linux/ptr_ring.h

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