Joe Stringer fd978bf7fd bpf: Add reference tracking to verifier ... Allow helper functions to acquire a reference and return it into a register. Specific pointer types such as the PTR_TO_SOCKET will implicitly represent such a reference. The verifier must ensure that these references are released exactly once in each path through the program. To achieve this, this commit assigns an id to the pointer and tracks it in the 'bpf_func_state', then when the function or program exits, verifies that all of the acquired references have been freed. When the pointer is passed to a function that frees the reference, it is removed from the 'bpf_func_state` and all existing copies of the pointer in registers are marked invalid. Signed-off-by: Joe Stringer <joe@wand.net.nz> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2018-10-03 02:53:47 +02:00
..
arraymap.c	bpf: add bpffs pretty print for program array map	2018-09-11 14:17:24 -07:00
bpf_lru_list.c	bpf: lru: Lower the PERCPU_NR_SCANS from 16 to 4	2017-04-17 13:55:52 -04:00
bpf_lru_list.h	bpf: Only set node->ref = 1 if it has not been set	2017-09-01 09:57:39 -07:00
btf.c	bpf: btf: Fix end boundary calculation for type section	2018-09-12 22:00:23 +02:00
cgroup.c	bpf: extend cgroup bpf core to allow multiple cgroup storage types	2018-10-01 16:18:32 +02:00
core.c	bpf: fix a rcu usage warning in bpf_prog_array_copy_core()	2018-08-16 21:55:32 +02:00
cpumap.c	bpf: fix redirect to map under tail calls	2018-08-17 15:56:23 -07:00
devmap.c	bpf: fix redirect to map under tail calls	2018-08-17 15:56:23 -07:00
disasm.c	bpf: Remove struct bpf_verifier_env argument from print_bpf_insn	2018-03-23 17:38:57 +01:00
disasm.h	bpf: Remove struct bpf_verifier_env argument from print_bpf_insn	2018-03-23 17:38:57 +01:00
hashtab.c	bpf: add bpffs pretty print for percpu arraymap/hash/lru_hash	2018-08-30 14:03:53 +02:00
helpers.c	bpf: introduce per-cpu cgroup local storage	2018-10-01 16:18:32 +02:00
inode.c	bpf: decouple btf from seq bpf fs dump and enable more maps	2018-08-13 00:52:45 +02:00
local_storage.c	bpf: introduce per-cpu cgroup local storage	2018-10-01 16:18:32 +02:00
lpm_trie.c	bpf: decouple btf from seq bpf fs dump and enable more maps	2018-08-13 00:52:45 +02:00
Makefile	bpf: Introduce BPF_MAP_TYPE_REUSEPORT_SOCKARRAY	2018-08-11 01:58:46 +02:00
map_in_map.c	bpf: don't allow create maps of per-cpu cgroup local storages	2018-10-01 16:18:33 +02:00
map_in_map.h	bpf: Add syscall lookup support for fd array and htab	2017-06-29 13:13:25 -04:00
offload.c	bpf: offload: allow program and map sharing per-ASIC	2018-07-18 15:10:34 +02:00
percpu_freelist.c	bpf: fix lockdep splat	2017-11-15 19:46:32 +09:00
percpu_freelist.h	bpf: introduce percpu_freelist	2016-03-08 15:28:31 -05:00
reuseport_array.c	bpf: Introduce BPF_MAP_TYPE_REUSEPORT_SOCKARRAY	2018-08-11 01:58:46 +02:00
sockmap.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2018-09-25 20:29:38 -07:00
stackmap.c	bpf: decouple btf from seq bpf fs dump and enable more maps	2018-08-13 00:52:45 +02:00
syscall.c	bpf: introduce per-cpu cgroup local storage	2018-10-01 16:18:32 +02:00
tnum.c	bpf/verifier: improve register value range tracking with ARSH	2018-04-29 08:45:53 -07:00
verifier.c	bpf: Add reference tracking to verifier	2018-10-03 02:53:47 +02:00
xskmap.c	bpf: fix redirect to map under tail calls	2018-08-17 15:56:23 -07:00