via-cuda: Prevent read buffer overflow
authorFinn Thain <fthain@telegraphics.com.au>
Sun, 1 Jan 2017 00:56:26 +0000 (19:56 -0500)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 7 Feb 2017 05:56:19 +0000 (16:56 +1100)
commitfe73b582f179354e233e5deddbd274efe8d3bbb9
tree508e70bc6bc1e696ce0dc7143920ec97e49b929a
parentfd7a65a27c6cb9b0920130d9402b95695168092d
via-cuda: Prevent read buffer overflow

If the Cuda driver does not enter the 'read_done' state for some
reason, it may continue in the 'reading' state until the buffer
overflows. Add a bounds check to prevent this.

Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
drivers/macintosh/via-cuda.c