Public bug reported:

Using kernel 6.1.0-1025-oem (ubuntu noble) I can't install or remove
snaps with --devmode.

This is an example of the error I see

sergio@cachiomachine:~/workspace/snapcore/snapd$ snap install test-snapd-tools 
--devmode
error: cannot perform the following tasks:
- Setup snap "test-snapd-tools" (9) security profiles (cannot setup profiles 
for snap "test-snapd-tools": cannot load apparmor profiles: exit status 185
apparmor_parser output:
/usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.block".  
Profile doesn't conform to protocol
/usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.cat".  
Profile doesn't conform to protocol
/usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.echo".  
Profile doesn't conform to protocol
/usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.head".  
Profile doesn't conform to protocol
/usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.cmd".  
Profile doesn't conform to protocol
/usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.env".  
Profile doesn't conform to protocol
/usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.sh".  
Profile doesn't conform to protocol
/usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.success".  
Profile doesn't conform to protocol
/usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.fail".  
Profile doesn't conform to protocol
)
sergio@cachiomachine:~/workspace/snapcore/snapd$ snap install test-snapd-tools
test-snapd-tools 1.0 from Test snaps (test-snaps-canonical) installed


I don't see any other error in dmesg or journal logs.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2081877

Title:
  cannot load apparmor profiles: profile doesn't conform to protocol

Status in linux package in Ubuntu:
  New

Bug description:
  Using kernel 6.1.0-1025-oem (ubuntu noble) I can't install or remove
  snaps with --devmode.

  This is an example of the error I see

  sergio@cachiomachine:~/workspace/snapcore/snapd$ snap install 
test-snapd-tools --devmode
  error: cannot perform the following tasks:
  - Setup snap "test-snapd-tools" (9) security profiles (cannot setup profiles 
for snap "test-snapd-tools": cannot load apparmor profiles: exit status 185
  apparmor_parser output:
  /usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.block".  
Profile doesn't conform to protocol
  /usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.cat".  
Profile doesn't conform to protocol
  /usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.echo".  
Profile doesn't conform to protocol
  /usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.head".  
Profile doesn't conform to protocol
  /usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.cmd".  
Profile doesn't conform to protocol
  /usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.env".  
Profile doesn't conform to protocol
  /usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.sh".  
Profile doesn't conform to protocol
  /usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.success". 
 Profile doesn't conform to protocol
  /usr/sbin/apparmor_parser: Unable to replace "snap.test-snapd-tools.fail".  
Profile doesn't conform to protocol
  )
  sergio@cachiomachine:~/workspace/snapcore/snapd$ snap install test-snapd-tools
  test-snapd-tools 1.0 from Test snaps (test-snaps-canonical) installed


  I don't see any other error in dmesg or journal logs.

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