This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag 'verification-needed-bionic' to 'verification-failed-
bionic'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-bionic

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https://bugs.launchpad.net/bugs/1795653

Title:
  87cdf3148b11 was never backported to 4.15

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  
  == SRU Justification ==
  Commit 87cdf3148b11 fixes a regression introduced by commit
  5efec5c655dd.  However, it has not never landed in Bionic.   Requesting
  this commit in Bionic, so we don't have to wait for it to come down from
  upstream stable.

  
  == Fix ==
  87cdf3148b11 ("xfrm: Verify MAC header exists before overwriting 
eth_hdr(skb)->h_proto")

  == Regression Potential ==
  Low.  This commit fixes and existing regression by making sure teh MAC
  header exists.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
reporter.
  The bug reporter states the test kernel resolved the bug.


  
  Hello,

  After a few days of troubleshooting a problem with L2TP and IPSec a
  fellow from ServerFault pointed out that my problem is a known bug
  fixed by  87cdf3148b11 commit which wasn't backported on 4.15 kernel.

  Ubuntu 4.15.0-36.39-generic 4.15.18

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