Files
runc/libcontainer/user/user_fuzzer.go
Kir Kolyshkin d8da00355e *: add go-1.17+ go:build tags
Go 1.17 introduce this new (and better) way to specify build tags.
For more info, see https://golang.org/design/draft-gobuild.

As a way to seamlessly switch from old to new build tags, gofmt (and
gopls) from go 1.17 adds the new tags along with the old ones.

Later, when go < 1.17 is no longer supported, the old build tags
can be removed.

Now, as I started to use latest gopls (v0.7.1), it adds these tags
while I edit. Rather than to randomly add new build tags, I guess
it is better to do it once for all files.

Mind that previous commits removed some tags that were useless,
so this one only touches packages that can at least be built
on non-linux.

Brought to you by

        go1.17 fmt ./...

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
2021-08-30 20:58:22 -07:00

44 lines
781 B
Go

//go:build gofuzz
// +build gofuzz
package user
import (
"io"
"strings"
)
func IsDivisbleBy(n int, divisibleby int) bool {
return (n % divisibleby) == 0
}
func FuzzUser(data []byte) int {
if len(data) == 0 {
return -1
}
if !IsDivisbleBy(len(data), 5) {
return -1
}
var divided [][]byte
chunkSize := len(data) / 5
for i := 0; i < len(data); i += chunkSize {
end := i + chunkSize
divided = append(divided, data[i:end])
}
_, _ = ParsePasswdFilter(strings.NewReader(string(divided[0])), nil)
var passwd, group io.Reader
group = strings.NewReader(string(divided[1]))
_, _ = GetAdditionalGroups([]string{string(divided[2])}, group)
passwd = strings.NewReader(string(divided[3]))
_, _ = GetExecUser(string(divided[4]), nil, passwd, group)
return 1
}