vfio/fsl-mc: prevent underflow in vfio_fsl_mc_mmap()

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My static analsysis tool complains that the "index" can be negative.
There are some checks in do_mmap() which try to prevent underflows but
I don't know if they are sufficient for this situation.  Either way,
making "index" unsigned is harmless so let's do it just to be safe.

Fixes: 6724728968 ("vfio/fsl-mc: Allow userspace to MMAP fsl-mc device MMIO regions")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Diana Craciun <diana.craciun@oss.nxp.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

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Dan Carpenter 2020-10-23 14:29:47 +03:00 • committed by Alex Williamson

parent 09699e56de

commit 69848cd6f0

1 changed files with 1 additions and 1 deletions

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drivers/vfio/fsl-mc/vfio_fsl_mc.c

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