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// Copyright 2017 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.
package openbsd
import (
"github.com/google/syzkaller/prog"
"github.com/google/syzkaller/sys/targets"
)
func InitTarget(target *prog.Target) {
arch := &arch{
unix: targets.MakeUnixSanitizer(target),
S_IFMT: target.GetConst("S_IFMT"),
S_IFCHR: target.GetConst("S_IFCHR"),
}
target.MakeMmap = targets.MakePosixMmap(target)
target.SanitizeCall = arch.SanitizeCall
}
type arch struct {
unix *targets.UnixSanitizer
S_IFMT uint64
S_IFCHR uint64
}
func (arch *arch) SanitizeCall(c *prog.Call) {
// Prevent vnodes of type VBAD from being created. Such vnodes will
// likely trigger assertion errors by the kernel.
pos := 1
switch c.Meta.CallName {
case "mknodat":
pos = 2
fallthrough
case "mknod":
mode := c.Args[pos].(*prog.ConstArg)
if mode.Val&arch.S_IFMT == arch.S_IFMT {
mode.Val &^= arch.S_IFMT
mode.Val |= arch.S_IFCHR
}
default:
arch.unix.SanitizeCall(c)
}
}
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