This bug was fixed in the package linux - 4.4.0-210.242

---------------
linux (4.4.0-210.242) xenial; urgency=medium

  * xenial/linux: 4.4.0-210.242 -proposed tracker (LP: #1924644)

  * setting extended attribute may cause memory leak (LP: #1924611)
    - SAUCE: vfs_setxattr: free converted value if xattr_permission returns 
error

 -- Stefan Bader <stefan.ba...@canonical.com>  Fri, 16 Apr 2021 11:33:09
+0200

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-5.6 in Ubuntu.
https://bugs.launchpad.net/bugs/1924611

Title:
  setting extended attribute may cause memory leak

Status in linux package in Ubuntu:
  Invalid
Status in linux-gke-5.3 package in Ubuntu:
  Invalid
Status in linux-hwe package in Ubuntu:
  Invalid
Status in linux-oem-5.6 package in Ubuntu:
  Invalid
Status in linux-raspi2-5.3 package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Fix Released
Status in linux-gke-5.3 source package in Xenial:
  Invalid
Status in linux-hwe source package in Xenial:
  Invalid
Status in linux-oem-5.6 source package in Xenial:
  Invalid
Status in linux-raspi2-5.3 source package in Xenial:
  Invalid
Status in linux source package in Bionic:
  Invalid
Status in linux-gke-5.3 source package in Bionic:
  Fix Released
Status in linux-hwe source package in Bionic:
  Fix Released
Status in linux-oem-5.6 source package in Bionic:
  Invalid
Status in linux-raspi2-5.3 source package in Bionic:
  Fix Released
Status in linux source package in Focal:
  Invalid
Status in linux-gke-5.3 source package in Focal:
  Invalid
Status in linux-hwe source package in Focal:
  Invalid
Status in linux-oem-5.6 source package in Focal:
  Fix Committed
Status in linux-raspi2-5.3 source package in Focal:
  Invalid

Bug description:
  [Impact]
  A memory leak may happen when an error happens when setting extended 
attributes.

  [Fix]
  The issue was introduced by an improper backport, so the fix is specific to 
Ubuntu, so a SAUCE patch.

  [Test case]
  Test setting attribute under a user namespace.

  [Regression potential]
  A double free bug might be introduced. Or setting extended attributes might 
fail.

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