Hi,
I'm running Fedora 35, and I'm trying to replicate a Fedora 36 root snapshot from
one Btrfs file system to another, but it fails.
This is what I see on CLI (with verbose logging)
set_xattr etc/NetworkManager/dispatcher.d - name=security.selinux data_len=56
data=system_u:object_r:NetworkManager_dispatcher_script_t:s0
ERROR: lsetxattr etc/NetworkManager/dispatcher.d
security.selinux=system_u:object_r:NetworkManager_dispatcher_script_t:s0 failed: Invalid
argument
This is the AVC error:
[25325.074972] audit[23509]: AVC avc: denied { mac_admin } for pid=23509
comm="btrfs" capability=33
scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=capability2
permissive=0
[25325.075188] audit: SELINUX_ERR op=setxattr
invalid_context="system_u:object_r:NetworkManager_dispatcher_script_t:s0"
I think what's going on is, Fedora 35's SELinux is preventing `btrfs receive` from
setting a label it doesn't know. If so, is this definitely the correct behavior? Or is
there something `btrfs receive`
could do to allow setting this unfamiliar label anyway, or is this an unacceptable risk to
set arbitrary labels?
I filed a btrfs-progs bug, feel free to answer there (or here)
https://github.com/kdave/btrfs-progs/issues/447
Thanks,
--
Chris Murphy