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add support for bpf syscall

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This commit is contained in:
Dmitry Vyukov 2015-11-29 11:05:08 +01:00
parent 83ec77a110
commit 9d1895c1bd
7 changed files with 597 additions and 426 deletions
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14
executor/syscalls.h
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@ -9,6 +9,9 @@ struct call_t {
#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif
#ifndef __NR_bpf
#define __NR_bpf 321
#endif
#define __NR_syz_openpts 1000001
#define __NR_syz_dri_open 1000002
@ -111,6 +114,7 @@ call_t syscalls[] = {
{"setsockopt$sock_cred", __NR_setsockopt},
{"getsockopt$sock_timeval", __NR_getsockopt},
{"setsockopt$sock_timeval", __NR_setsockopt},
{"setsockopt$sock_attach_bpf", __NR_setsockopt},
{"getsockopt$tcp_int", __NR_getsockopt},
{"setsockopt$tcp_int", __NR_setsockopt},
{"getsockopt$tcp_buf", __NR_getsockopt},
@ -534,4 +538,14 @@ call_t syscalls[] = {
{"write$fuse_notify_delete", __NR_write},
{"write$fuse_notify_store", __NR_write},
{"write$fuse_notify_retrieve", __NR_write},
{"bpf$MAP_CREATE", __NR_bpf},
{"bpf$MAP_LOOKUP_ELEM", __NR_bpf},
{"bpf$MAP_UPDATE_ELEM", __NR_bpf},
{"bpf$MAP_DELETE_ELEM", __NR_bpf},
{"bpf$MAP_GET_NEXT_KEY", __NR_bpf},
{"bpf$PROG_LOAD", __NR_bpf},
{"bpf$OBJ_PIN_MAP", __NR_bpf},
{"bpf$OBJ_PIN_PROG", __NR_bpf},
{"bpf$OBJ_GET_MAP", __NR_bpf},
{"bpf$OBJ_GET_PROG", __NR_bpf},
};

20
prog/consts.go
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@ -26,6 +26,25 @@ const (
AT_REMOVEDIR = 512
AT_SYMLINK_FOLLOW = 1024
AT_SYMLINK_NOFOLLOW = 256
BPF_ANY = 0
BPF_EXIST = 2
BPF_MAP_CREATE = 0
BPF_MAP_DELETE_ELEM = 3
BPF_MAP_GET_NEXT_KEY = 4
BPF_MAP_LOOKUP_ELEM = 1
BPF_MAP_TYPE_ARRAY = 2
BPF_MAP_TYPE_HASH = 1
BPF_MAP_TYPE_PERF_EVENT_ARRAY = 4
BPF_MAP_TYPE_PROG_ARRAY = 3
BPF_MAP_UPDATE_ELEM = 2
BPF_NOEXIST = 1
BPF_OBJ_GET = 7
BPF_OBJ_PIN = 6
BPF_PROG_LOAD = 5
BPF_PROG_TYPE_KPROBE = 2
BPF_PROG_TYPE_SCHED_ACT = 4
BPF_PROG_TYPE_SCHED_CLS = 3
BPF_PROG_TYPE_SOCKET_FILTER = 1
CLOCK_BOOTTIME = 7
CLOCK_MONOTONIC = 1
CLOCK_MONOTONIC_COARSE = 6
@ -806,6 +825,7 @@ const (
SOCK_STREAM = 1
SOL_SOCKET = 1
SO_ACCEPTCONN = 30
SO_ATTACH_BPF = 50
SO_BINDTODEVICE = 25
SO_BROADCAST = 6
SO_DEBUG = 1

2
prog/rand.go
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@ -227,7 +227,7 @@ func (r *randGen) randString(s *state) []byte {
"posix_acl_access", "mime_type", "md5sum", "nodev", "self",
"bdev", "proc", "cgroup", "cpuset",
"lo", "eth0", "eth1", "em0", "em1", "wlan0", "wlan1", "ppp0", "ppp1",
"vboxnet0", "vboxnet1", "vmnet0", "vmnet1"}
"vboxnet0", "vboxnet1", "vmnet0", "vmnet1", "GPL"}
punct := []byte{'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '-', '+', '\\',
'/', ':', '.', ',', '-', '\'', '[', ']', '{', '}'}
buf := new(bytes.Buffer)

8
sys/decl.go
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@ -73,6 +73,8 @@ const (
FdDRI
FdFuse
FdKdbus
FdBpfMap
FdBpfProg
IPCMsq
IPCSem
@ -125,7 +127,8 @@ func (t ResourceType) SpecialValues() []uintptr {
return []uintptr{0, ^uintptr(0)}
case ResKey:
// KEY_SPEC_THREAD_KEYRING values
return []uintptr{0, ^uintptr(0), ^uintptr(0) - 1, ^uintptr(0) - 2, ^uintptr(0) - 3, ^uintptr(0) - 4, ^uintptr(0) - 5, ^uintptr(0) - 6, ^uintptr(0) - 7}
return []uintptr{0, ^uintptr(0), ^uintptr(0) - 1, ^uintptr(0) - 2, ^uintptr(0) - 3,
^uintptr(0) - 4, ^uintptr(0) - 5, ^uintptr(0) - 6, ^uintptr(0) - 7}
case ResInotifyDesc:
return []uintptr{0}
case ResPid:
@ -169,7 +172,8 @@ func (t ResourceType) Size() uintptr {
func (t ResourceType) SubKinds() []ResourceSubkind {
switch t.Kind {
case ResFD:
return []ResourceSubkind{FdFile, FdSock, FdPipe, FdSignal, FdEvent, FdTimer, FdEpoll, FdDir, FdMq, FdInotify, FdFanotify, FdTty, FdDRI, FdFuse, FdKdbus}
return []ResourceSubkind{FdFile, FdSock, FdPipe, FdSignal, FdEvent, FdTimer, FdEpoll,
FdDir, FdMq, FdInotify, FdFanotify, FdTty, FdDRI, FdFuse, FdKdbus, FdBpfMap, FdBpfProg}
case ResIPC:
return []ResourceSubkind{IPCMsq, IPCSem, IPCShm}
case ResIOCtx, ResKey, ResInotifyDesc, ResPid, ResUid, ResGid, ResTimerid:

857
sys/sys.go
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File diff suppressed because one or more lines are too long

115
sys/sys.txt
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@ -193,6 +193,7 @@ getsockopt$sock_cred(fd fd[sock], level const[SOL_SOCKET], optname const[SO_PEER
setsockopt$sock_cred(fd fd[sock], level const[SOL_SOCKET], optname const[SO_PEERCRED], optval ptr[in, ucred], optlen len[optval])
getsockopt$sock_timeval(fd fd[sock], level const[SOL_SOCKET], optname flags[sockopt_opt_sock_timeval], optval ptr[out, timeval], optlen ptr[inout, len[optval, int32]])
setsockopt$sock_timeval(fd fd[sock], level const[SOL_SOCKET], optname flags[sockopt_opt_sock_timeval], optval ptr[in, timeval], optlen len[optval])
setsockopt$sock_attach_bpf(fd fd[sock], level const[SOL_SOCKET], optname const[SO_ATTACH_BPF], optval ptr[in, fd[bpf_prog]], optlen len[optval])
getsockopt$tcp_int(fd fd[sock], level const[IPPROTO_TCP], optname flags[sockopt_opt_tcp_int], optval ptr[out, int32], optlen ptr[inout, len[optval, int32]])
setsockopt$tcp_int(fd fd[sock], level const[IPPROTO_TCP], optname flags[sockopt_opt_tcp_int], optval ptr[in, int32], optlen len[optval])
getsockopt$tcp_buf(fd fd[sock], level const[IPPROTO_TCP], optname const[TCP_INFO], optval buffer[out], optlen ptr[inout, len[optval, int32]])
@ -2327,3 +2328,117 @@ fuse_notify_retrieve_out {
size int32
pad const[0, int32]
}
# BPF
bpf$MAP_CREATE(cmd const[BPF_MAP_CREATE], arg ptr[in, bpf_map_create_arg], size len[arg]) fd[bpf_map]
bpf$MAP_LOOKUP_ELEM(cmd const[BPF_MAP_LOOKUP_ELEM], arg ptr[in, bpf_map_lookup_arg], size len[arg])
bpf$MAP_UPDATE_ELEM(cmd const[BPF_MAP_UPDATE_ELEM], arg ptr[in, bpf_map_update_arg], size len[arg])
bpf$MAP_DELETE_ELEM(cmd const[BPF_MAP_DELETE_ELEM], arg ptr[in, bpf_map_delete_arg], size len[arg])
bpf$MAP_GET_NEXT_KEY(cmd const[BPF_MAP_GET_NEXT_KEY], arg ptr[in, bpf_map_get_next_arg], size len[arg])
bpf$PROG_LOAD(cmd const[BPF_PROG_LOAD], arg ptr[in, bpf_prog], size len[arg]) fd[bpf_prog]
bpf$OBJ_PIN_MAP(cmd const[BPF_OBJ_PIN], arg ptr[in, bpf_obj_pin_map], size len[arg])
bpf$OBJ_PIN_PROG(cmd const[BPF_OBJ_PIN], arg ptr[in, bpf_obj_pin_prog], size len[arg])
bpf$OBJ_GET_MAP(cmd const[BPF_OBJ_GET], arg ptr[in, bpf_obj_get], size len[arg]) fd[bpf_map]
bpf$OBJ_GET_PROG(cmd const[BPF_OBJ_GET], arg ptr[in, bpf_obj_get], size len[arg]) fd[bpf_prog]
bpf_map_create_arg {
type flags[bpf_map_type, int32]
ksize int32
vsize int32
max int32
}
bpf_map_lookup_arg {
map fd[bpf_map]
pad const[0, int32]
key buffer[in]
val buffer[out]
}
bpf_map_update_arg {
map fd[bpf_map]
pad const[0, int32]
key buffer[in]
val buffer[in]
flags flags[bpf_map_flags, int64]
}
bpf_map_delete_arg {
map fd[bpf_map]
pad const[0, int32]
key buffer[in]
}
bpf_map_get_next_arg {
map fd[bpf_map]
pad const[0, int32]
key buffer[in]
next buffer[out]
}
bpf_prog {
type flags[bpf_prog_type, int32]
ninsn len[insns, int32]
insns ptr[in, array[bpf_insn]]
license string
loglev int32
logsize len[log, int32]
log buffer[out]
kver int32
}
bpf_insn {
code int8
dst int8
src int8
off int16
imm int32
}
bpf_obj_pin_map {
path filename
fd fd[bpf_map]
}
bpf_obj_pin_prog {
path filename
fd fd[bpf_prog]
}
bpf_obj_get {
path filename
fd const[0, int32]
}
bpf_map_type = BPF_MAP_TYPE_HASH, BPF_MAP_TYPE_ARRAY, BPF_MAP_TYPE_PROG_ARRAY, BPF_MAP_TYPE_PERF_EVENT_ARRAY
bpf_map_flags = BPF_ANY, BPF_NOEXIST, BPF_EXIST
bpf_prog_type = BPF_PROG_TYPE_SOCKET_FILTER, BPF_PROG_TYPE_KPROBE, BPF_PROG_TYPE_SCHED_CLS, BPF_PROG_TYPE_SCHED_ACT
define BPF_MAP_CREATE 0
define BPF_MAP_LOOKUP_ELEM 1
define BPF_MAP_UPDATE_ELEM 2
define BPF_MAP_DELETE_ELEM 3
define BPF_MAP_GET_NEXT_KEY 4
define BPF_PROG_LOAD 5
define BPF_OBJ_PIN 6
define BPF_OBJ_GET 7
define BPF_MAP_TYPE_HASH 1
define BPF_MAP_TYPE_ARRAY 2
define BPF_MAP_TYPE_PROG_ARRAY 3
define BPF_MAP_TYPE_PERF_EVENT_ARRAY 4
define BPF_ANY 0
define BPF_NOEXIST 1
define BPF_EXIST 2
define BPF_PROG_TYPE_SOCKET_FILTER 1
define BPF_PROG_TYPE_KPROBE 2
define BPF_PROG_TYPE_SCHED_CLS 3
define BPF_PROG_TYPE_SCHED_ACT 4
define SO_ATTACH_BPF 50

7
sysgen/sysgen.go
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@ -332,6 +332,10 @@ func fmtFdKind(s string) string {
return "FdFuse"
case "kdbus":
return "FdKdbus"
case "bpf_map":
return "FdBpfMap"
case "bpf_prog":
return "FdBpfProg"
default:
failf("bad fd type %v", s)
return ""
@ -418,6 +422,9 @@ struct call_t {
#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif
#ifndef __NR_bpf
#define __NR_bpf 321
#endif
#define __NR_syz_openpts 1000001
#define __NR_syz_dri_open 1000002