Thanks for the link, for some reason I was looking in the wrong place. The issue seems to have been introduced in 4.15.0-13 (4.15.0-12 works). There is in fact a CIFS related patch[1][2][3] that was backported and is most probably the one introducing this regression.
[1] https://www.spinics.net/lists/linux-cifs/msg13861.html [2] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747572 [3] https://bugzilla.samba.org/show_bug.cgi?id=12917 ** Bug watch added: Samba Bugzilla #12917 https://bugzilla.samba.org/show_bug.cgi?id=12917 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1792580 Title: Mounting SOFS SMB shares fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1792580/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs