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staging: iio: adc: max1363: prevent buffer overflow

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ring->access.read_last() reads the entire datum from
the ring including padding and time stamp.

Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Michael Hennerich 2010-10-06 16:15:37 +02:00 committed by Greg Kroah-Hartman
parent 858f1ccff1
commit e1517c00da
1 changed files with 1 additions and 2 deletions
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3
drivers/staging/iio/adc/max1363_ring.c
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@ -38,9 +38,8 @@ int max1363_single_channel_from_ring(long mask, struct max1363_state *st)
ret = -EBUSY;
goto error_ret;
}
numvals = hweight_long(st->current_mode->modemask);
ring_data = kmalloc(numvals*2, GFP_KERNEL);
ring_data = kmalloc(ring->access.get_bytes_per_datum(ring), GFP_KERNEL);
if (ring_data == NULL) {
ret = -ENOMEM;
goto error_ret;