vfio/pci: Add missing range check in vfio_pci_mmap

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commit 909290786e upstream.

When mmaping an extra device region verify that the region index
derived from the mmap offset is valid.

Fixes: a15b1883fe ("vfio_pci: Allow mapping extra regions")
Cc: stable@vger.kernel.org
Signed-off-by: Christian A. Ehrhardt <lk@c--e.de>
Message-Id: <20210412214124.GA241759@lisa.in-ulm.de>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Christian A. Ehrhardt 2021-04-12 23:41:24 +02:00 • committed by Greg Kroah-Hartman

parent e6177990e1

commit f66d695c06

1 changed files with 3 additions and 1 deletions

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drivers/vfio/pci/vfio_pci.c

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