27f19427f6
The recovery flow for A/B devices allows to sideload an OTA downloaded
to a desktop and apply from recovery. This patch allows the "recovery"
context to perform all the operations required to apply an update as
update_engine would do in the background. These rules are now extracted
into a new attributte called update_engine_common shared between
recovery and update_engine.
Bug: 27178350
(cherry picked from commit d63084d32a)
Change-Id: I1f3e1e83a21e37e09b69cd9c497f87b42b9cbeb1
37 lines
1.8 KiB
Text
37 lines
1.8 KiB
Text
# update_engine payload application permissions. These are shared between the
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# background daemon and the recovery tool to sideload an update.
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# Allow update_engine to reach block devices in /dev/block.
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allow update_engine_common block_device:dir search;
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# Allow read/write on system and boot partitions.
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allow update_engine_common boot_block_device:blk_file rw_file_perms;
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allow update_engine_common system_block_device:blk_file rw_file_perms;
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# Allow to set recovery options in the BCB. Used to trigger factory reset when
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# the update to an older version (channel change) or incompatible version
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# requires it.
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allow update_engine_common misc_block_device:blk_file rw_file_perms;
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# Allow update_engine_common to mount on the /postinstall directory and reset the
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# labels on the mounted filesystem to postinstall_file.
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allow update_engine_common postinstall_mnt_dir:dir mounton;
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allow update_engine_common postinstall_file:filesystem { mount unmount relabelfrom relabelto };
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allow update_engine_common labeledfs:filesystem relabelfrom;
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# Allow update_engine_common to read and execute postinstall_file.
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allow update_engine_common postinstall_file:file rx_file_perms;
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allow update_engine_common postinstall_file:lnk_file r_file_perms;
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allow update_engine_common postinstall_file:dir r_dir_perms;
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# The postinstall program is run by update_engine_common and will always be tagged as a
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# postinstall_file regardless of its attributes in the new system.
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domain_auto_trans(update_engine_common, postinstall_file, postinstall)
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# A postinstall program is typically a shell script (with a #!), so we allow
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# to execute those.
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allow update_engine_common shell_exec:file rx_file_perms;
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# Allow update_engine_common to suspend, resume and kill the postinstall program.
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allow update_engine_common postinstall:process { signal sigstop };
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