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55 lines
1.8 KiB
55 lines
1.8 KiB
# Any fsck program run by init |
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type fsck, domain; |
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type fsck_exec, exec_type, file_type; |
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# /dev/__null__ created by init prior to policy load, |
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# open fd inherited by fsck. |
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allow fsck tmpfs:chr_file { read write ioctl }; |
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# Inherit and use pty created by android_fork_execvp_ext(). |
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allow fsck devpts:chr_file { read write ioctl getattr }; |
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# Allow stdin/out back to vold |
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allow fsck vold:fd use; |
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allow fsck vold:fifo_file { read write getattr }; |
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# Run fsck on certain block devices |
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allow fsck block_device:dir search; |
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allow fsck userdata_block_device:blk_file rw_file_perms; |
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allow fsck cache_block_device:blk_file rw_file_perms; |
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allow fsck dm_device:blk_file rw_file_perms; |
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# To determine if it is safe to run fsck on a filesystem, e2fsck |
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# must first determine if the filesystem is mounted. To do that, |
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# e2fsck scans through /proc/mounts and collects all the mounted |
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# block devices. With that information, it runs stat() on each block |
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# device, comparing the major and minor numbers to the filesystem |
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# passed in on the command line. If there is a match, then the filesystem |
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# is currently mounted and running fsck is dangerous. |
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# Allow stat access to all block devices so that fsck can compare |
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# major/minor values. |
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allow fsck dev_type:blk_file getattr; |
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r_dir_file(fsck, proc) |
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allow fsck rootfs:dir r_dir_perms; |
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### |
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### neverallow rules |
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### |
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# fsck should never be run on these block devices |
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neverallow fsck { |
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boot_block_device |
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frp_block_device |
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metadata_block_device |
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recovery_block_device |
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root_block_device |
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swap_block_device |
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system_block_device |
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vold_device |
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}:blk_file no_rw_file_perms; |
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# Only allow entry from init or vold via fsck binaries |
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neverallow { domain -init -vold } fsck:process transition; |
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neverallow * fsck:process dyntransition; |
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neverallow fsck { file_type fs_type -fsck_exec }:file entrypoint;
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