@FedeX It's interesting that reverting to 3.13.0-133 fixed the issue since there are no cifs related change from 3.13.0-133 to 3.13.0-135.
Also, according to upstream kernel bugzilla 197311, it's mentioned that this was introduced by: 0603c96f upstream ("SMB: Validate negotiate (to protect against downgrade) even if signing off") However, this commit was not backported to Trusty. Would it be possible for you to assist with a kernel bisect to identify the specific commit that introduced this bug in trusty? It would require you testing 3 - 5 test kernels. I started a kernel bisect between Ubuntu-3.13.0-133 and Ubuntu-3.13.0-135. I built the first test kernel, up to the following commit: 5165d87e2242f7d253eca47f4a15ff2cf62eac53 The test kernel can be downloaded from: http://kernel.ubuntu.com/~jsalisbury/lp1729337 If you can assist with a bisect, would it be possible for you to test that kernel and report back if it has the bug or not? I will build the next test kernel based on your test results. Note, just be sure to install both the linux-image and linux-image-extra .deb packages for these kernels. Thanks in advance -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1729337 Title: CIFS errors on 4.4.0-98, but not on 4.4.0-97 with same config To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1729337/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs