drbd: fix decoding of bitmap vli rle for device sizes > 64 TB
Symptoms: disconnect after bitmap exchange due to
bitmap overflow (e:49731075554) while decoding bm RLE packet
In the decoding step of the variable length integer run length encoding
there was potentially an uncatched bitshift by wordsize (variable >> 64).
The result of which is "undefined" :(
(only "sometimes" the result is the desired 0)
Fix: don't do any bit shift magic for shift == 64, just assign.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed