[Bug 1866458] Re: drbd not working after kernel upgrade 5.0.x -> 5.3.x

[Rafael David Tinoco]

Thanks for your report @a1bert!

The commit that likely fixes the issue is this one:

  1 commit 859151b2
  2 Author: He Zhe <zhe.he at windriver.com>
  3 Date:   Fri Jul 12 07:07:27 2019
  4
  5     netlink: Add NLA_F_NESTED flag to nested attribute
  6
  7     The mainline kernel v5.2 commit b424e432e770
  8     ("netlink: add validation of NLA_F_NESTED flag") imposes strict validation
  9     against nested attribute as follow.
 10
 11     "
 12     Add new validation flag NL_VALIDATE_NESTED which adds three consistency
 13     checks of NLA_F_NESTED_FLAG:
 14
 15       - the flag is set on attributes with NLA_NESTED{,_ARRAY} policy
 16       - the flag is not set on attributes with other policies except NLA_UNSPEC
 17       - the flag is set on attribute passed to nla_parse_nested()
 18     "
 19
 20     Sending messages with nested attribute without NLA_F_NESTED would cause failed
 21     validation. For example,
 22
 23     $ drbdsetup new-resource r0
 24     Invalid argument
 25
 26     This patch adds NLA_F_NESTED flag to all nested attributes.
 27
 28     Signed-off-by: He Zhe <zhe.he at windriver.com>

and a simple:

+#ifndef NLA_F_NESTED
+#define NLA_F_NESTED 0
+#endif

I'll try to fix this in the next days or so.

ADVICE (for other users who find this):

For now mitigation is to stay in the previous kernel and wait until this
bug is either Fix Proposed (-proposed repo) or Fix Released (-updates).


** Changed in: drbd-utils (Ubuntu)
       Status: New => Triaged

** Changed in: drbd-utils (Ubuntu)
   Importance: Undecided => Medium

** Changed in: drbd-utils (Ubuntu)
     Assignee: (unassigned) => Rafael David Tinoco (rafaeldtinoco)

** Changed in: drbd-utils (Ubuntu)
       Status: Triaged => Confirmed

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https://bugs.launchpad.net/bugs/1866458

Title:
  drbd  not working after kernel upgrade 5.0.x -> 5.3.x

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