drbd: Ensure that data_size is not 0 before using data_size-1 as index
authorPhilipp Reisner <philipp.reisner@linbit.com>
Fri, 6 Apr 2012 10:08:51 +0000 (12:08 +0200)
committerPhilipp Reisner <philipp.reisner@linbit.com>
Thu, 8 Nov 2012 15:58:26 +0000 (16:58 +0100)
This could be exploited by a peer which runs modified code.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

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