staging: comedi: avoid bad truncation of a size_t in comedi_read()

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At one point in `comedi_read()`, the variable `n` gets assigned to the
minimum of the parameter `nbytes` and the amount of readable buffer
space `m`.  The way that is done currently is unsafe in the unlikely
case that `nbytes` exceeds `UINT_MAX`, so fix it.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ian Abbott 2015-10-12 17:21:24 +01:00 • committed by Greg Kroah-Hartman

parent 76e8e7d4ff

commit 8ea939284d

1 changed files with 1 additions and 4 deletions

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drivers/staging/comedi/comedi_fops.c

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