From: Philipp Reisner Date: Mon, 28 Apr 2014 16:43:30 +0000 (+0200) Subject: drbd: Fix a hole in the challange-response connection authentication X-Git-Tag: omap-for-v3.17/soc-cleanup~42^2~7^2~25 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=67cca286caa6e33f3134bd36834d2484538f4f78;p=pandora-kernel.git drbd: Fix a hole in the challange-response connection authentication In the implementation as it was, the two peers sent each other a challenge, and expects the challenge hashed with the shared secret back. A attacker could simply wait for the challenge of the peer, and send the same challenge back. Then it waits for the response, and sends the same response back. Prevent this by not accepting a challenge from the peer that is the same as the challenge sent to the peer. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe --- Reading git-diff-tree failed