[Bug 1417] New: mapping to adjacent ranges is causing error in kernel 5.6, kernel 5.5 works fine

[bugzilla-daemon at netfilter.org]

https://bugzilla.netfilter.org/show_bug.cgi?id=1417

            Bug ID: 1417
           Summary: mapping to adjacent ranges is causing error in kernel
                    5.6, kernel 5.5 works fine
           Product: nftables
           Version: unspecified
          Hardware: x86_64
                OS: All
            Status: NEW
          Severity: critical
          Priority: P5
         Component: kernel
          Assignee: pablo at netfilter.org
          Reporter: karel at unitednetworks.cz

Created attachment 588
  --> https://bugzilla.netfilter.org/attachment.cgi?id=588&action=edit
example of adjacent ranges causing error

After upgrading kernel from 5.5 to 5.6.2 our ruleset which includes mapping
packet sizes to counters fails to load. Problem is in adjacent ranges:

This fails (with File exists message):

counter name ip length map { 0-100 : "c1", 101-200 : "c2" }

After increasing start of second range by one it loads ok:

counter name ip length map { 0-100 : "c1", 102-200 : "c2" }

See attached examples.



Probably same bug as:

https://bugzilla.netfilter.org/show_bug.cgi?id=1415

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