d644f26066
In libext2fs ext2fs_check_mount_point() calls is_swap_device() to
verify that a device is swap before setting the EXT2_MF_SWAP mount
flag.
Addresses:
avc: denied { getattr } for path="/dev/block/zram0" dev="tmpfs" ino=9951
scontext=u:r:fsck:s0 tcontext=u:object_r:swap_block_device:s0 tclass=blk_file
Bug: 22821100
Change-Id: Ic7a1b6f83b34a40bf4bd35a1564300c58ca27089
47 lines
1.4 KiB
Text
47 lines
1.4 KiB
Text
# Any fsck program run by init
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type fsck, domain, domain_deprecated;
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type fsck_exec, exec_type, file_type;
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init_daemon_domain(fsck)
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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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# fsck performs a stat() on swap to verify that it is a valid
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# swap device before setting the EXT2_MF_SWAP mount flag.
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allow fsck swap_block_device:blk_file getattr;
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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 domain fsck:process dyntransition;
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neverallow fsck { file_type fs_type -fsck_exec }:file entrypoint;
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