17cfd3fce7
Commit: b144ebab48 added the sysfs_usb
type and granted the read perms globally, but did not add write
permissions for all domains that previously had them. Add the ability
to write to sysfs_usb for all domains that had the ability to write to
those files previously (sysfs).
Address denials such as:
type=1400 audit(1904.070:4): avc: denied { write } for pid=321 comm="ueventd" name="uevent" dev="sysfs" ino=1742 scontext=u:r:ueventd:s0 tcontext=u:object_r:sysfs_usb:s0 tclass=file permissive=0
Bug: 28417852
Change-Id: I4562ea73f2158ebefba74b58ca572f2176d1b849
44 lines
2 KiB
Text
44 lines
2 KiB
Text
# ueventd seclabel is specified in init.rc since
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# it lives in the rootfs and has no unique file type.
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type ueventd, domain, domain_deprecated;
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tmpfs_domain(ueventd)
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# TODO: why is ueventd using __kmsg__ when it should just create
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# and use /dev/kmsg instead?
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type_transition ueventd device:chr_file klog_device "__kmsg__";
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allow ueventd klog_device:chr_file { create open write unlink };
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security_access_policy(ueventd)
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allow ueventd init:process sigchld;
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allow ueventd self:capability { chown mknod net_admin setgid fsetid sys_rawio dac_override fowner };
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allow ueventd device:file create_file_perms;
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allow ueventd device:chr_file rw_file_perms;
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allow ueventd sysfs:file rw_file_perms;
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allow ueventd sysfs_usb:file w_file_perms;
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allow ueventd sysfs_hwrandom:file w_file_perms;
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allow ueventd sysfs_zram_uevent:file w_file_perms;
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allow ueventd sysfs_type:{ file lnk_file } { relabelfrom relabelto setattr getattr };
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allow ueventd sysfs_type:dir { relabelfrom relabelto setattr r_dir_perms };
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allow ueventd sysfs_devices_system_cpu:file rw_file_perms;
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allow ueventd tmpfs:chr_file rw_file_perms;
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allow ueventd dev_type:dir create_dir_perms;
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allow ueventd dev_type:lnk_file { create unlink };
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allow ueventd dev_type:chr_file { create setattr unlink };
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allow ueventd dev_type:blk_file { relabelfrom relabelto create setattr unlink };
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allow ueventd self:netlink_kobject_uevent_socket create_socket_perms;
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allow ueventd efs_file:dir search;
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allow ueventd efs_file:file r_file_perms;
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# Use setfscreatecon() to label /dev directories and files.
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allow ueventd self:process setfscreate;
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#####
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##### neverallow rules
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#####
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# ueventd must never set properties, otherwise deadlocks may occur.
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# https://android-review.googlesource.com/#/c/133120/6/init/devices.cpp@941
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# No writing to the property socket, connecting to init, or setting properties.
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neverallow ueventd property_socket:sock_file write;
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neverallow ueventd init:unix_stream_socket connectto;
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neverallow ueventd property_type:property_service set;
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