10a639613a
Wi-Fi vendor AIDL service uses NDK to register itself to service
manager. AServiceManager_registerLazyService registers an
IClientCallback to service manager. The callback is invoked when there
is a transition between having >= 1 clients and having 0 clients (or
vice versa). Please check IClientCallback.aidl. As a result servicemanager may
make binder call to Wi-Fi vendor AIDL service. Since this is not allowed
per current SE policies, "avc denied" occurred:
servicemanager: type=1400 audit(0.0:248): avc: denied { call } for scontext=u:r:servicemanager:s0 tcontext=u:r:hal_wifi_default:s0 tclass=binder permissive=0
We add SE policy for hal_wifi_default to allow binder call like this.
Bug: 270511173
Test: manually build and test, check logs for avc denied
Change-Id: Ia6fcf5fc1cafff0381fc9857805bdc61cc838c1e
35 lines
1.5 KiB
Text
35 lines
1.5 KiB
Text
# HwBinder IPC from client to server, and callbacks
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binder_call(hal_wifi_client, hal_wifi_server)
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binder_call(hal_wifi_server, hal_wifi_client)
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hal_attribute_hwservice(hal_wifi, hal_wifi_hwservice)
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hal_attribute_service(hal_wifi, hal_wifi_service)
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binder_use(hal_wifi_server)
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r_dir_file(hal_wifi, proc_net_type)
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r_dir_file(hal_wifi, sysfs_type)
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set_prop(hal_wifi_server, wifi_hal_prop)
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set_prop(hal_wifi, wifi_prop)
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userdebug_or_eng(`get_prop(hal_wifi, persist_vendor_debug_wifi_prop)')
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# allow hal wifi set interfaces up and down and get the factory MAC
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allow hal_wifi self:udp_socket create_socket_perms;
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allowxperm hal_wifi self:udp_socket ioctl { SIOCSIFFLAGS SIOCSIFHWADDR SIOCETHTOOL };
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allow hal_wifi self:global_capability_class_set { net_admin net_raw };
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# allow hal_wifi to speak to nl80211 in the kernel
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allow hal_wifi self:netlink_socket create_socket_perms_no_ioctl;
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# newer kernels (e.g. 4.4 but not 4.1) have a new class for sockets
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allow hal_wifi self:netlink_generic_socket create_socket_perms_no_ioctl;
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# hal_wifi writes firmware paths to this file.
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allow hal_wifi sysfs_wlan_fwpath:file { w_file_perms };
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# allow hal_wifi to access /proc/modules to check if Wi-Fi driver is loaded
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allow hal_wifi proc_modules:file { getattr open read };
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# Allow hal_wifi to send dump info to dumpstate
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allow hal_wifi dumpstate:fifo_file write;
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# allow hal_wifi to write into /data/vendor/tombstones/wifi
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allow hal_wifi_server tombstone_wifi_data_file:dir rw_dir_perms;
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allow hal_wifi_server tombstone_wifi_data_file:file create_file_perms;
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