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// Copyright 2015 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
//go:build linux
// +build linux
package host
import (
"fmt"
"runtime"
"syscall"
"testing"
"github.com/google/syzkaller/prog"
"github.com/google/syzkaller/sys/targets"
)
func TestSupportedSyscalls(t *testing.T) {
t.Parallel()
target, err := prog.GetTarget(targets.Linux, runtime.GOARCH)
if err != nil {
t.Fatal(err)
}
// These are safe to execute with invalid arguments.
safe := []string{
"memfd_create",
"sendfile",
"bpf$MAP_CREATE",
"open",
"openat",
"read",
"write",
"stat",
}
enabled := make(map[*prog.Syscall]bool)
for _, name := range safe {
c := target.SyscallMap[name]
if c == nil {
t.Fatalf("can't find syscall '%v'", name)
}
enabled[c] = true
}
supp, _, err := DetectSupportedSyscalls(target, "none", enabled)
if err != nil {
t.Skipf("skipping: %v", err)
}
for c := range enabled {
a := ^uintptr(0) - 4097 // hopefully invalid
_, _, err := syscall.Syscall6(uintptr(c.NR), a, a, a, a, a, a)
if err == 0 {
t.Fatalf("%v did not fail", c.Name)
}
if ok := err != syscall.ENOSYS; ok != supp[c] {
t.Fatalf("syscall %v: perse=%v kallsyms=%v", c.Name, ok, supp[c])
}
}
}
func TestKallsymsParse(t *testing.T) {
tests := []struct {
Arch string
Kallsyms []byte
ParsedSyscalls []string
SupportedSyscalls []string
}{
{
targets.AMD64,
[]byte(`
ffffffff817cdcc0 T __sys_bind
ffffffff817cdda0 T __x64_sys_bind
ffffffff817cddc0 T __ia32_sys_bind
ffffffff817cdde0 T __sys_listen
ffffffff817cde80 T __x64_sys_listen
ffffffff817cde90 T __ia32_sys_listen
ffffffff817cdea0 T __sys_accept4
ffffffff817ce080 T __x64_sys_accept4
ffffffff817ce0a0 T __ia32_sys_accept4
`),
[]string{"bind", "listen", "accept4"},
[]string{"bind", "listen", "accept4"},
},
{
targets.ARM64,
[]byte(`
ffff000010a3ddf8 T __sys_bind
ffff000010a3def8 T __arm64_sys_bind
ffff000010a3df20 T __sys_listen
ffff000010a3dfd8 T __arm64_sys_listen
ffff000010a3e000 T __sys_accept4
ffff000010a3e1f0 T __arm64_sys_accept4
`),
[]string{"bind", "listen", "accept4"},
[]string{"bind", "listen", "accept4"},
},
{
targets.PPC64LE,
[]byte(`
c0000000011ec810 T __sys_bind
c0000000011eca10 T sys_bind
c0000000011eca10 T __se_sys_bind
c0000000011eca70 T __sys_listen
c0000000011ecc10 T sys_listen
c0000000011ecc10 T __se_sys_listen
c0000000011ecc70 T __sys_accept4
c0000000011ed050 T sys_accept4
c0000000011ed050 T __se_sys_accept4
`),
[]string{"bind", "listen", "accept4"},
[]string{"bind", "listen", "accept4"},
},
{
targets.ARM,
[]byte(`
c037c67c T __se_sys_setfsuid
c037c694 T __sys_setfsgid
c037c790 T sys_setfsgid
c037c790 T __se_sys_setfsgid
c037c7a8 T sys_getpid
c037c7d0 T sys_gettid
c037c7f8 T sys_getppid
`),
[]string{"setfsgid", "getpid", "gettid", "getppid"},
[]string{"setfsgid", "getpid", "gettid", "getppid"},
},
// Test kallsymsRenameMap.
{
targets.PPC64LE,
[]byte(`
c00000000037eb00 T sys_newstat
`),
[]string{"newstat"},
[]string{"stat"},
},
{
targets.S390x,
[]byte(`
0000000000e4f760 T __sys_bind
0000000000e4f8e8 T __s390_sys_bind
0000000000e4f938 T __s390x_sys_bind
0000000000e4f938 T __se_sys_bind
0000000000e4f988 T __sys_listen
0000000000e4fab0 T __s390_sys_listen
0000000000e4faf8 T __s390x_sys_listen
0000000000e4faf8 T __se_sys_listen
0000000000e4fb40 T __sys_accept4
0000000000e4fe58 T __s390_sys_accept4
0000000000e4feb0 T __s390x_sys_accept4
0000000000e4feb0 T __se_sys_accept4
`),
[]string{"bind", "listen", "accept4"},
[]string{"bind", "listen", "accept4"},
},
{
targets.RiscV64,
[]byte(`
ffffffe0005c9b02 T __sys_bind
ffffffe0005c9ba0 T sys_bind
ffffffe0005c9ba0 T __se_sys_bind
ffffffe0005c9e72 T __sys_accept4
ffffffe0005c9f00 T sys_accept4
ffffffe0005c9f00 T __se_sys_accept4
ffffffe0005c9bd8 T __sys_listen
ffffffe0005c9c76 T sys_listen
ffffffe0005c9c76 T __se_sys_listen
`),
[]string{"bind", "listen", "accept4"},
[]string{"bind", "listen", "accept4"},
},
}
for _, test := range tests {
syscallSet := parseKallsyms(test.Kallsyms, test.Arch)
if len(syscallSet) != len(test.ParsedSyscalls) {
t.Fatalf("wrong number of parse syscalls, expected: %v, got: %v",
len(test.ParsedSyscalls), len(syscallSet))
}
for _, syscall := range test.ParsedSyscalls {
if _, ok := syscallSet[syscall]; !ok {
t.Fatalf("syscall %v not found in parsed syscall list", syscall)
}
}
for _, syscall := range test.SupportedSyscalls {
if newname := kallsymsRenameMap[syscall]; newname != "" {
syscall = newname
}
if _, ok := syscallSet[syscall]; !ok {
t.Fatalf("syscall %v not found in supported syscall list", syscall)
}
}
}
}
func TestMatchKernelVersion(t *testing.T) {
tests := []struct {
version string
major int
minor int
res bool
bad bool
}{
{
version: "5.9.0-rc5-next-20200918",
major: 5,
minor: 8,
res: true,
},
{
version: "5.9.0-rc5-next-20200918",
major: 4,
minor: 10,
res: true,
},
{
version: "5.9.0-rc5-next-20200918",
major: 5,
minor: 9,
res: true,
},
{
version: "5.9.0-rc5-next-20200918",
major: 5,
minor: 10,
res: false,
},
{
version: "5.9.0-rc5-next-20200918",
major: 6,
minor: 0,
res: false,
},
{
version: "4.4.246-19567-g2c01e3dada31",
major: 4,
minor: 3,
res: true,
},
{
version: "4.4.246-19567-g2c01e3dada31",
major: 4,
minor: 4,
res: true,
},
{
version: "5.17.17-1debian-amd64",
major: 5,
minor: 16,
res: true,
},
{
version: "5.17.17-1debian-amd64",
major: 5,
minor: 17,
res: true,
},
{
version: "3.5",
major: 3,
minor: 4,
res: true,
},
{
version: "3.5",
major: 3,
minor: 5,
res: true,
},
{
version: "3.5",
major: 3,
minor: 6,
res: false,
},
{
version: "",
bad: true,
},
{
version: "something unparsable",
bad: true,
},
{
version: "mykernel 4.17-5",
bad: true,
},
{
version: "999999.999999",
bad: true,
},
{
version: "4.abc.def",
bad: true,
},
}
for i, test := range tests {
t.Run(fmt.Sprint(i), func(t *testing.T) {
ok, bad := matchKernelVersion(test.version, test.major, test.minor)
if test.bad && !bad {
t.Fatal("want error, but got no error")
}
if !test.bad && bad {
t.Fatalf("want no error, but got error")
}
if test.res != ok {
t.Fatalf("want match %v, but got %v", test.res, ok)
}
})
}
}
|
