rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back
JIRA: https://issues.redhat.com/browse/RHEL-36874
CVE: CVE-2024-27414
Upstream Status: all maiinline in net.git
Conflicts: None
Tested: boot-tested only
Signed-off-by: Davide Caratti dcaratti@redhat.com