Public bug reported:

Bazaar is a flatpak software store.
I cannot use the Bazaar flatpak to install other flatpak apps.

The system journal shows the following audits:

io.github.kolunmi.Bazaar.desktop[12577]: Running fusermount wrapper, 
redirecting to host...
kernel: audit: type=1400 audit(1761863969.387:680): apparmor="DENIED" 
operation="file_inherit" class="file" info="Failed name lookup - disconnected 
path" error=-13 profile="fusermount3" name="dev/null" pid=12582 
comm="fusermount3" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
kernel: audit: type=1400 audit(1761863969.387:681): apparmor="DENIED" 
operation="open" class="file" info="Failed name lookup - disconnected path" 
error=-13 profile="fusermount3" name="apparmor/.null" pid=12582 
comm="fusermount3" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
kernel: audit: type=1400 audit(1761863969.387:682): apparmor="DENIED" 
operation="file_inherit" class="file" info="Failed name lookup - disconnected 
path" error=-13 profile="fusermount3" name="dev/null" pid=12582 
comm="fusermount3" requested_mask="w" denied_mask="w" fsuid=0 ouid=0
kernel: audit: type=1400 audit(1761863969.387:683): apparmor="DENIED" 
operation="file_inherit" class="file" info="Failed name lookup - disconnected 
path" error=-13 profile="fusermount3" name="dev/null" pid=12582 
comm="fusermount3" requested_mask="w" denied_mask="w" fsuid=0 ouid=0
kernel: audit: type=1400 audit(1761863969.396:684): apparmor="DENIED" 
operation="file_inherit" class="file" info="Failed name lookup - disconnected 
path" error=-13 profile="fusermount3" name="dev/null" pid=12586 
comm="fusermount3" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
kernel: audit: type=1400 audit(1761863969.396:685): apparmor="DENIED" 
operation="open" class="file" info="Failed name lookup - disconnected path" 
error=-13 profile="fusermount3" name="apparmor/.null" pid=12586 
comm="fusermount3" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
kernel: audit: type=1400 audit(1761863969.396:686): apparmor="DENIED" 
operation="file_inherit" class="net" profile="fusermount3" pid=12586 
comm="fusermount3" family="unix" sock_type="stream" protocol=0 requested="send 
receive" denied="send receive" addr=none peer_addr=none peer="bwrap"
kernel: audit: type=1400 audit(1761863969.396:687): apparmor="DENIED" 
operation="file_inherit" class="net" profile="fusermount3" pid=12586 
comm="fusermount3" family="unix" sock_type="stream" protocol=0 requested="send 
receive" denied="send receive" addr=none peer_addr=none peer="unpriv_bwrap"
io.github.kolunmi.Bazaar.desktop[12586]: fusermount3: file descriptor 5 is not 
a socket, can't send fuse fd
io.github.kolunmi.Bazaar.desktop[12590]: Running fusermount wrapper, 
redirecting to host...
kernel: audit: type=1400 audit(1761863969.572:688): apparmor="DENIED" 
operation="file_inherit" class="file" info="Failed name lookup - disconnected 
path" error=-13 profile="fusermount3" name="dev/null" pid=12595 
comm="fusermount3" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
kernel: audit: type=1400 audit(1761863969.572:689): apparmor="DENIED" 
operation="open" class="file" info="Failed name lookup - disconnected path" 
error=-13 profile="fusermount3" name="apparmor/.null" pid=12595 
comm="fusermount3" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
io.github.kolunmi.Bazaar.desktop[12599]: fusermount3: entry for 
/var/tmp/flatpak-cache-QQ7JF3/com.usebottles.bottles.Locale-2A4CF3 not found in 
/etc/mtab
bazaar[12294]: Transaction failed to complete: Could not unmount revokefs-fuse 
filesystem at 
/var/tmp/flatpak-cache-QQ7JF3/com.usebottles.bottles.Locale-2A4CF3: Child 
process exited with code 1

---

apparmor:
  Installed: 5.0.0~alpha1-0ubuntu8.1
  Candidate: 5.0.0~alpha1-0ubuntu8.1

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

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https://bugs.launchpad.net/bugs/2130388

Title:
  Cannot install flatpaks from io.github.kolunmi.Bazaar

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