b74017d3b3
This fixes the following denial in O:
update_engine: type=1400 audit(0.0:2100): avc: denied { sigkill } for scontext=u:r:update_engine:s0 tcontext=u:r:postinstall:s0 tclass=process permissive=0
Bug: 35111618
Test: update_engine_client --cancel during postinstall
Change-Id: I7456a95b5ca6fbdb268a5e16a13e2409758141f5
42 lines
1.9 KiB
Text
42 lines
1.9 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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# 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 sigkill };
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# access /proc/misc
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# Access is also granted to proc:file, but it is likely unneeded
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# due to the more specific grant to proc_misc immediately below.
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allow update_engine proc:file r_file_perms; # delete candidate
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allow update_engine proc_misc:file r_file_perms;
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# read directories on /system and /vendor
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allow update_engine system_file:dir r_dir_perms;
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