214294ce75
Brings in the io_uring class and associated restrictions and adds a new macro, `io_uring_use`, to sepolicy. In more detail, this change: * Adds a new macro expands to ensure the domain it is passed can undergo a type transition to a new type, `<domain>_iouring`, when the anon_inode being accessed is labeled `[io_uring]`. It also allows the domain to create, read, write, and map the io_uring anon_inode. * Adds the ability for a domain to use the `IORING_SETUP_SQPOLL` flag during `io_uring_setup` so that a syscall to `io_uring_enter` is not required by the caller each time it wishes to submit IO. This can be enabled securely as long as we don't enable sharing of io_uring file descriptors across domains. The kernel polling thread created by `SQPOLL` will inherit the credentials of the thread that created the io_uring [1]. * Removes the selinux policy that restricted all domains that make use of the `userfault_fd` macro from any `anon_inode` created by another domain. This is overly restrictive, as it prohibits the use of two different `anon_inode` use cases in a single domain e.g. userfaultfd and io_uring. This change also replaces existing sepolicy in fastbootd and snapuserd that enabled the use of io_uring. [1] https://patchwork.kernel.org/project/linux-security-module/patch/163159041500.470089.11310853524829799938.stgit@olly/ Bug: 253385258 Test: m selinux_policy Test: cd external/liburing; mm; atest liburing_test; # requires WIP CL ag/20291423 Test: Manually deliver OTAs (built with m dist) to a recent Pixel device and ensure snapuserd functions correctly (no io_uring failures) Change-Id: I96f38760b3df64a1d33dcd6e5905445ccb125d3f
172 lines
3.1 KiB
Text
172 lines
3.1 KiB
Text
# FLASK
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#
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# Define the security object classes
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#
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# Classes marked as userspace are classes
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# for userspace object managers
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class security
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class process
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class system
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class capability
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# file-related classes
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class filesystem
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class file
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class anon_inode
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class dir
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class fd
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class lnk_file
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class chr_file
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class blk_file
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class sock_file
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class fifo_file
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# network-related classes
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class socket
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class tcp_socket
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class udp_socket
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class rawip_socket
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class node
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class netif
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class netlink_socket
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class packet_socket
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class key_socket
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class unix_stream_socket
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class unix_dgram_socket
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# sysv-ipc-related classes
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class sem
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class msg
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class msgq
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class shm
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class ipc
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# extended netlink sockets
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class netlink_route_socket
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class netlink_tcpdiag_socket
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class netlink_nflog_socket
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class netlink_xfrm_socket
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class netlink_selinux_socket
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class netlink_audit_socket
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class netlink_dnrt_socket
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# IPSec association
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class association
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# Updated Netlink class for KOBJECT_UEVENT family.
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class netlink_kobject_uevent_socket
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class appletalk_socket
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class packet
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# Kernel access key retention
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class key
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class dccp_socket
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class memprotect
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# network peer labels
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class peer
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# Capabilities >= 32
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class capability2
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# kernel services that need to override task security, e.g. cachefiles
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class kernel_service
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class tun_socket
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class binder
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# Updated netlink classes for more recent netlink protocols.
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class netlink_iscsi_socket
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class netlink_fib_lookup_socket
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class netlink_connector_socket
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class netlink_netfilter_socket
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class netlink_generic_socket
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class netlink_scsitransport_socket
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class netlink_rdma_socket
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class netlink_crypto_socket
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# Infiniband
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class infiniband_pkey
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class infiniband_endport
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# Capability checks when on a non-init user namespace
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class cap_userns
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class cap2_userns
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# New socket classes introduced by extended_socket_class policy capability.
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# These two were previously mapped to rawip_socket.
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class sctp_socket
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class icmp_socket
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# These were previously mapped to socket.
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class ax25_socket
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class ipx_socket
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class netrom_socket
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class atmpvc_socket
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class x25_socket
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class rose_socket
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class decnet_socket
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class atmsvc_socket
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class rds_socket
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class irda_socket
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class pppox_socket
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class llc_socket
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class can_socket
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class tipc_socket
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class bluetooth_socket
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class iucv_socket
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class rxrpc_socket
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class isdn_socket
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class phonet_socket
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class ieee802154_socket
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class caif_socket
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class alg_socket
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class nfc_socket
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class vsock_socket
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class kcm_socket
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class qipcrtr_socket
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class smc_socket
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class process2
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class bpf
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class xdp_socket
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class perf_event
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class io_uring
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# Introduced in https://github.com/torvalds/linux/commit/59438b46471ae6cdfb761afc8c9beaf1e428a331
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class lockdown
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# Property service
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class property_service # userspace
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# Service manager
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class service_manager # userspace
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# hardware service manager # userspace
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class hwservice_manager
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# Legacy Keystore key permissions
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class keystore_key # userspace
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# Keystore 2.0 permissions
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class keystore2 # userspace
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# Keystore 2.0 key permissions
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class keystore2_key # userspace
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# Diced permissions
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class diced # userspace
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class drmservice # userspace
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# FLASK
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