| Inseob Kim | ff43be2 | 2021-06-07 16:56:56 +0900 | [diff] [blame^] | 1 | # snapuserd - Daemon for servicing dm-user requests for Virtual A/B snapshots. |
| 2 | type snapuserd, domain; |
| 3 | type snapuserd_exec, exec_type, file_type, system_file_type; |
| 4 | |
| 5 | typeattribute snapuserd coredomain; |
| 6 | |
| 7 | init_daemon_domain(snapuserd) |
| 8 | |
| 9 | allow snapuserd kmsg_device:chr_file rw_file_perms; |
| 10 | |
| 11 | # Reading and writing to /dev/block/dm-* (device-mapper) nodes. |
| 12 | allow snapuserd block_device:dir r_dir_perms; |
| 13 | allow snapuserd dm_device:chr_file rw_file_perms; |
| 14 | allow snapuserd dm_device:blk_file rw_file_perms; |
| 15 | |
| 16 | # Reading and writing to dm-user control nodes. |
| 17 | allow snapuserd dm_user_device:dir r_dir_perms; |
| 18 | allow snapuserd dm_user_device:chr_file rw_file_perms; |
| 19 | |
| 20 | # Reading and writing to /dev/socket/snapuserd. |
| 21 | allow snapuserd snapuserd_socket:unix_stream_socket { accept listen getattr read write }; |
| 22 | |
| 23 | # This arises due to first-stage init opening /dev/null without F_CLOEXEC |
| 24 | # (see SetStdioToDevNull in init). When we fork() and execveat() snapuserd |
| 25 | # again, the descriptor leaks into the new process. |
| 26 | allow snapuserd kernel:fd use; |