forkexec: build for go1.19

This commit is contained in:
criyle 2022-10-01 18:49:58 -07:00
parent 69f0dffbeb
commit 7af58bbeb9
3 changed files with 92 additions and 83 deletions

6
go.mod
View File

@ -1,11 +1,11 @@
module github.com/criyle/go-sandbox
go 1.18
go 1.19
require (
github.com/elastic/go-seccomp-bpf v1.2.0
golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b
golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64
golang.org/x/net v0.0.0-20220930213112-107f3e3c3b0b
golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec
)
require github.com/pkg/errors v0.9.1 // indirect

8
go.sum
View File

@ -13,12 +13,12 @@ github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b h1:ZmngSVLe/wycRns9MKikG9OWIEjGcGAkacif7oYQaUY=
golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
golang.org/x/net v0.0.0-20220930213112-107f3e3c3b0b h1:uKO3Js8lXGjpjdc4J3rqs0/Ex5yDKUGfk43tTYWVLas=
golang.org/x/net v0.0.0-20220930213112-107f3e3c3b0b/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190405154228-4b34438f7a67/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64 h1:UiNENfZ8gDvpiWw7IpOMQ27spWmThO1RwwdQVbJahJM=
golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec h1:BkDtF2Ih9xZ7le9ndzTA7KJow28VbQW3odyk/8drmuI=
golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

View File

@ -8,14 +8,9 @@ import (
)
// Reference to src/syscall/exec_linux.go
//
//go:norace
func forkAndExecInChild(r *Runner, argv0 *byte, argv, env []*byte, workdir, hostname, domainname, pivotRoot *byte, p [2]int) (r1 uintptr, err1 syscall.Errno) {
var (
loc ErrorLocation
idx, pipe int
childError ChildError
)
// similar to exec_linux, avoid side effect by shuffling around
fd, nextfd := prepareFds(r.Files)
@ -39,33 +34,16 @@ func forkAndExecInChild(r *Runner, argv0 *byte, argv, env []*byte, workdir, host
afterForkInChild()
// Notice: cannot call any GO functions beyond this point
pipe, loc, idx, err1 = forkAndExecInChild1(r, argv0, argv, env, workdir, hostname, domainname, pivotRoot, fd, nextfd, p)
// send error code on pipe
childError.Err = err1
childError.Location = loc
childError.Index = idx
// send error code on pipe
syscall.RawSyscall(unix.SYS_WRITE, uintptr(pipe), uintptr(unsafe.Pointer(&childError)), unsafe.Sizeof(childError))
for {
syscall.RawSyscall(syscall.SYS_EXIT, uintptr(err1), 0, 0)
}
// cannot reach this point
}
//go:nosplit
func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hostname, domainname, pivotRoot *byte, fd []int, nextfd int, p [2]int) (pipe int, loc ErrorLocation, idx int, err1 syscall.Errno) {
pipe = p[1]
pipe := p[1]
var (
r1, pid uintptr
pid uintptr
err2 syscall.Errno
unshareUser = r.CloneFlags&unix.CLONE_NEWUSER == unix.CLONE_NEWUSER
)
// Close write end of pipe
if _, _, err1 = syscall.RawSyscall(syscall.SYS_CLOSE, uintptr(p[0]), 0, 0); err1 != 0 {
return pipe, LocCloseWrite, 0, err1
childExitError(pipe, LocCloseWrite, err1)
}
// If usernamespace is unshared, uid map and gid map is required to create folders
@ -76,22 +54,22 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
if unshareUser {
r1, _, err1 = syscall.RawSyscall(syscall.SYS_READ, uintptr(pipe), uintptr(unsafe.Pointer(&err2)), unsafe.Sizeof(err2))
if err1 != 0 {
return pipe, LocUnshareUserRead, 0, err1
childExitError(pipe, LocUnshareUserRead, err1)
}
if r1 != unsafe.Sizeof(err2) {
err1 = syscall.EINVAL
return pipe, LocUnshareUserRead, 0, err1
childExitError(pipe, LocUnshareUserRead, err1)
}
if err2 != 0 {
err1 = err2
return pipe, LocUnshareUserRead, 0, err1
childExitError(pipe, LocUnshareUserRead, err1)
}
}
// Get pid of child
pid, _, err1 = syscall.RawSyscall(syscall.SYS_GETPID, 0, 0, 0)
if err1 != 0 {
return pipe, LocGetPid, 0, err1
childExitError(pipe, LocGetPid, err1)
}
// keep capabilities through set_uid / set_gid calls (make sure we can use unshare cgroup), later dropped
@ -99,7 +77,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
_, _, err1 = syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_SET_SECUREBITS,
_SECURE_KEEP_CAPS_LOCKED|_SECURE_NO_SETUID_FIXUP|_SECURE_NO_SETUID_FIXUP_LOCKED, 0)
if err1 != 0 {
return pipe, LocKeepCapability, 0, err1
childExitError(pipe, LocKeepCapability, err1)
}
}
@ -113,16 +91,16 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
if !(r.GIDMappings != nil && !r.GIDMappingsEnableSetgroups && ngroups == 0) && !cred.NoSetGroups {
_, _, err1 = syscall.RawSyscall(unix.SYS_SETGROUPS, ngroups, groups, 0)
if err1 != 0 {
return pipe, LocSetGroups, 0, err1
childExitError(pipe, LocSetGroups, err1)
}
}
_, _, err1 = syscall.RawSyscall(unix.SYS_SETGID, uintptr(cred.Gid), 0, 0)
if err1 != 0 {
return pipe, LocSetGid, 0, err1
childExitError(pipe, LocSetGid, err1)
}
_, _, err1 = syscall.RawSyscall(unix.SYS_SETUID, uintptr(cred.Uid), 0, 0)
if err1 != 0 {
return pipe, LocSetUid, 0, err1
childExitError(pipe, LocSetUid, err1)
}
}
@ -131,7 +109,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
if pipe < nextfd {
_, _, err1 = syscall.RawSyscall(syscall.SYS_DUP3, uintptr(pipe), uintptr(nextfd), syscall.O_CLOEXEC)
if err1 != 0 {
return pipe, LocDup3, 0, err1
childExitError(pipe, LocDup3, err1)
}
pipe = nextfd
nextfd++
@ -143,7 +121,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
}
_, _, err1 = syscall.RawSyscall(syscall.SYS_DUP3, r.ExecFile, uintptr(nextfd), syscall.O_CLOEXEC)
if err1 != 0 {
return pipe, LocDup3, 0, err1
childExitError(pipe, LocDup3, err1)
}
r.ExecFile = uintptr(nextfd)
nextfd++
@ -156,7 +134,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
}
_, _, err1 = syscall.RawSyscall(syscall.SYS_DUP3, uintptr(fd[i]), uintptr(nextfd), syscall.O_CLOEXEC)
if err1 != 0 {
return pipe, LocDup3, 0, err1
childExitError(pipe, LocDup3, err1)
}
// Set up close on exec
fd[i] = nextfd
@ -173,40 +151,39 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
// dup2(i, i) will not clear close on exec flag, need to reset the flag
_, _, err1 = syscall.RawSyscall(syscall.SYS_FCNTL, uintptr(fd[i]), syscall.F_SETFD, 0)
if err1 != 0 {
return pipe, LocFcntl, 0, err1
childExitError(pipe, LocFcntl, err1)
}
continue
}
_, _, err1 = syscall.RawSyscall(syscall.SYS_DUP3, uintptr(fd[i]), uintptr(i), 0)
if err1 != 0 {
return pipe, LocDup3, 0, err1
childExitError(pipe, LocDup3, err1)
}
}
// Set the session ID
_, _, err1 = syscall.RawSyscall(syscall.SYS_SETSID, 0, 0, 0)
if err1 != 0 {
return pipe, LocSetSid, 0, err1
childExitError(pipe, LocSetSid, err1)
}
// Set the controlling TTY
if r.CTTY {
_, _, err1 = syscall.RawSyscall(syscall.SYS_IOCTL, uintptr(0), uintptr(syscall.TIOCSCTTY), 1)
if err1 != 0 {
return pipe, LocIoctl, 0, err1
childExitError(pipe, LocIoctl, err1)
}
}
// Mount file system
{
loc = LocMount
// If mount point is unshared, mark root as private to avoid propagate
// outside to the original mount namespace
if r.CloneFlags&syscall.CLONE_NEWNS == syscall.CLONE_NEWNS {
_, _, err1 = syscall.RawSyscall6(syscall.SYS_MOUNT, uintptr(unsafe.Pointer(&none[0])),
uintptr(unsafe.Pointer(&slash[0])), 0, syscall.MS_REC|syscall.MS_PRIVATE, 0, 0)
if err1 != 0 {
return pipe, LocMountRoot, 0, err1
childExitError(pipe, LocMountRoot, err1)
}
}
@ -217,30 +194,30 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
uintptr(unsafe.Pointer(pivotRoot)), uintptr(unsafe.Pointer(&tmpfs[0])), 0,
uintptr(unsafe.Pointer(&empty[0])), 0)
if err1 != 0 {
return pipe, LocMountTmpfs, 0, err1
childExitError(pipe, LocMountTmpfs, err1)
}
_, _, err1 = syscall.RawSyscall(syscall.SYS_CHDIR, uintptr(unsafe.Pointer(pivotRoot)), 0, 0)
if err1 != 0 {
return pipe, LocMountChdir, 0, err1
childExitError(pipe, LocMountChdir, err1)
}
}
// performing mounts
for i, m := range r.Mounts {
// mkdirs(target)
for i, p := range m.Prefixes {
for j, p := range m.Prefixes {
// if target mount point is a file, mknod(target)
if i == len(m.Prefixes)-1 && m.MakeNod {
if j == len(m.Prefixes)-1 && m.MakeNod {
_, _, err1 = syscall.RawSyscall(syscall.SYS_MKNODAT, uintptr(_AT_FDCWD), uintptr(unsafe.Pointer(p)), 0755)
if err1 != 0 && err1 != syscall.EEXIST {
return pipe, LocMountMkdir, 0, err1
childExitErrorWithIndex(pipe, LocMountMkdir, i, err1)
}
break
}
_, _, err1 = syscall.RawSyscall(syscall.SYS_MKDIRAT, uintptr(_AT_FDCWD), uintptr(unsafe.Pointer(p)), 0755)
if err1 != 0 && err1 != syscall.EEXIST {
return pipe, LocMountMkdir, 0, err1
childExitErrorWithIndex(pipe, LocMountMkdir, i, err1)
}
}
// mount(source, target, fsType, flags, data)
@ -248,7 +225,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
uintptr(unsafe.Pointer(m.Target)), uintptr(unsafe.Pointer(m.FsType)), uintptr(m.Flags),
uintptr(unsafe.Pointer(m.Data)), 0)
if err1 != 0 {
return pipe, LocMount, i, err1
childExitErrorWithIndex(pipe, LocMount, i, err1)
}
// bind mount is not respect ro flag so that read-only bind mount needs remount
if m.Flags&bindRo == bindRo {
@ -256,7 +233,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
uintptr(unsafe.Pointer(m.Target)), uintptr(unsafe.Pointer(m.FsType)),
uintptr(m.Flags|syscall.MS_REMOUNT), uintptr(unsafe.Pointer(m.Data)), 0)
if err1 != 0 {
return pipe, LocMount, i, err1
childExitErrorWithIndex(pipe, LocMount, i, err1)
}
}
}
@ -266,25 +243,25 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
// mkdir("old_root")
_, _, err1 = syscall.RawSyscall(syscall.SYS_MKDIRAT, uintptr(_AT_FDCWD), uintptr(unsafe.Pointer(&oldRoot[0])), 0755)
if err1 != 0 {
return
childExitError(pipe, LocPivotRoot, err1)
}
// pivot_root(root, "old_root")
_, _, err1 = syscall.RawSyscall(syscall.SYS_PIVOT_ROOT, uintptr(unsafe.Pointer(pivotRoot)), uintptr(unsafe.Pointer(&oldRoot[0])), 0)
if err1 != 0 {
return
childExitError(pipe, LocPivotRoot, err1)
}
// umount("old_root", MNT_DETACH)
_, _, err1 = syscall.RawSyscall(syscall.SYS_UMOUNT2, uintptr(unsafe.Pointer(&oldRoot[0])), syscall.MNT_DETACH, 0)
if err1 != 0 {
return
childExitError(pipe, LocPivotRoot, err1)
}
// rmdir("old_root")
_, _, err1 = syscall.RawSyscall(syscall.SYS_UNLINKAT, uintptr(_AT_FDCWD), uintptr(unsafe.Pointer(&oldRoot[0])), uintptr(unix.AT_REMOVEDIR))
if err1 != 0 {
return
childExitError(pipe, LocPivotRoot, err1)
}
// mount("tmpfs", "/", "tmpfs", MS_BIND | MS_REMOUNT | MS_RDONLY | MS_NOATIME | MS_NOSUID, nil)
@ -293,7 +270,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
uintptr(syscall.MS_BIND|syscall.MS_REMOUNT|syscall.MS_RDONLY|syscall.MS_NOATIME|syscall.MS_NOSUID),
uintptr(unsafe.Pointer(&empty[0])), 0)
if err1 != 0 {
return
childExitError(pipe, LocPivotRoot, err1)
}
}
}
@ -314,7 +291,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
if workdir != nil {
_, _, err1 = syscall.RawSyscall(syscall.SYS_CHDIR, uintptr(unsafe.Pointer(workdir)), 0, 0)
if err1 != 0 {
return pipe, LocChdir, 0, err1
childExitError(pipe, LocChdir, err1)
}
}
@ -323,7 +300,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
// prlimit instead of setrlimit to avoid 32-bit limitation (linux > 3.2)
_, _, err1 = syscall.RawSyscall6(syscall.SYS_PRLIMIT64, 0, uintptr(rlim.Res), uintptr(unsafe.Pointer(&rlim.Rlim)), 0, 0, 0)
if err1 != 0 {
return pipe, LocSetRlimit, i, err1
childExitErrorWithIndex(pipe, LocSetRlimit, i, err1)
}
}
@ -331,7 +308,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
if r.NoNewPrivs || r.Seccomp != nil {
_, _, err1 = syscall.RawSyscall6(syscall.SYS_PRCTL, unix.PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0, 0)
if err1 != 0 {
return pipe, LocSetNoNewPrivs, 0, err1
childExitError(pipe, LocSetNoNewPrivs, err1)
}
}
@ -341,11 +318,11 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
_, _, err1 = syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_SET_SECUREBITS,
_SECURE_KEEP_CAPS_LOCKED|_SECURE_NO_SETUID_FIXUP|_SECURE_NO_SETUID_FIXUP_LOCKED|_SECURE_NOROOT|_SECURE_NOROOT_LOCKED, 0)
if err1 != 0 {
return pipe, LocDropCapability, 0, err1
childExitError(pipe, LocDropCapability, err1)
}
_, _, err1 = syscall.RawSyscall(syscall.SYS_CAPSET, uintptr(unsafe.Pointer(&dropCapHeader)), uintptr(unsafe.Pointer(&dropCapData)), 0)
if err1 != 0 {
return pipe, LocSetCap, 0, err1
childExitError(pipe, LocSetCap, err1)
}
}
@ -354,12 +331,12 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
{
r1, _, err1 = syscall.RawSyscall(syscall.SYS_WRITE, uintptr(pipe), uintptr(unsafe.Pointer(&err2)), uintptr(unsafe.Sizeof(err2)))
if r1 == 0 || err1 != 0 {
return pipe, LocSyncWrite, 0, err1
childExitError(pipe, LocSyncWrite, err1)
}
r1, _, err1 = syscall.RawSyscall(syscall.SYS_READ, uintptr(pipe), uintptr(unsafe.Pointer(&err2)), uintptr(unsafe.Sizeof(err2)))
if r1 == 0 || err1 != 0 {
return pipe, LocSyncRead, 0, err1
childExitError(pipe, LocSyncRead, err1)
}
// unshare cgroup namespace
@ -372,11 +349,11 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
_, _, err1 = syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_SET_SECUREBITS,
_SECURE_KEEP_CAPS_LOCKED|_SECURE_NO_SETUID_FIXUP|_SECURE_NO_SETUID_FIXUP_LOCKED|_SECURE_NOROOT|_SECURE_NOROOT_LOCKED, 0)
if err1 != 0 {
return pipe, LocKeepCapability, 0, err1
childExitError(pipe, LocKeepCapability, err1)
}
_, _, err1 = syscall.RawSyscall(syscall.SYS_CAPSET, uintptr(unsafe.Pointer(&dropCapHeader)), uintptr(unsafe.Pointer(&dropCapData)), 0)
if err1 != 0 {
return pipe, LocSetCap, 0, err1
childExitError(pipe, LocSetCap, err1)
}
}
@ -384,14 +361,14 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
// Load seccomp filter
_, _, err1 = syscall.RawSyscall(unix.SYS_SECCOMP, SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_TSYNC, uintptr(unsafe.Pointer(r.Seccomp)))
if err1 != 0 {
return pipe, LocSeccomp, 0, err1
childExitError(pipe, LocSeccomp, err1)
}
}
}
}
_, _, err1 = syscall.RawSyscall(syscall.SYS_PTRACE, uintptr(syscall.PTRACE_TRACEME), 0, 0)
if err1 != 0 {
return pipe, LocPtraceMe, 0, err1
childExitError(pipe, LocPtraceMe, err1)
}
}
@ -402,7 +379,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
// Stop to wait for ptrace tracer
_, _, err1 = syscall.RawSyscall(syscall.SYS_KILL, pid, uintptr(syscall.SIGSTOP), 0)
if err1 != 0 {
return pipe, LocStop, 0, err1
childExitError(pipe, LocStop, err1)
}
}
@ -416,7 +393,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
// Load seccomp filter
_, _, err1 = syscall.RawSyscall(unix.SYS_SECCOMP, SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_TSYNC, uintptr(unsafe.Pointer(r.Seccomp)))
if err1 != 0 {
return pipe, LocSeccomp, 0, err1
childExitError(pipe, LocSeccomp, err1)
}
}
@ -425,12 +402,12 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
{
r1, _, err1 = syscall.RawSyscall(syscall.SYS_WRITE, uintptr(pipe), uintptr(unsafe.Pointer(&err2)), uintptr(unsafe.Sizeof(err2)))
if r1 == 0 || err1 != 0 {
return pipe, LocSyncWrite, 0, err1
childExitError(pipe, LocSyncWrite, err1)
}
r1, _, err1 = syscall.RawSyscall(syscall.SYS_READ, uintptr(pipe), uintptr(unsafe.Pointer(&err2)), uintptr(unsafe.Sizeof(err2)))
if r1 == 0 || err1 != 0 {
return pipe, LocSyncRead, 0, err1
childExitError(pipe, LocSyncRead, err1)
}
// unshare cgroup namespace
@ -443,11 +420,11 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
_, _, err1 = syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_SET_SECUREBITS,
_SECURE_KEEP_CAPS_LOCKED|_SECURE_NO_SETUID_FIXUP|_SECURE_NO_SETUID_FIXUP_LOCKED|_SECURE_NOROOT|_SECURE_NOROOT_LOCKED, 0)
if err1 != 0 {
return pipe, LocKeepCapability, 0, err1
childExitError(pipe, LocKeepCapability, err1)
}
_, _, err1 = syscall.RawSyscall(syscall.SYS_CAPSET, uintptr(unsafe.Pointer(&dropCapHeader)), uintptr(unsafe.Pointer(&dropCapData)), 0)
if err1 != 0 {
return pipe, LocSetCap, 0, err1
childExitError(pipe, LocSetCap, err1)
}
}
@ -455,7 +432,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
// Load seccomp filter
_, _, err1 = syscall.RawSyscall(unix.SYS_SECCOMP, SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_TSYNC, uintptr(unsafe.Pointer(r.Seccomp)))
if err1 != 0 {
return pipe, LocSeccomp, 0, err1
childExitError(pipe, LocSeccomp, err1)
}
}
}
@ -466,7 +443,7 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
if r.Ptrace && r.Seccomp == nil {
_, _, err1 = syscall.RawSyscall(syscall.SYS_PTRACE, uintptr(syscall.PTRACE_TRACEME), 0, 0)
if err1 != 0 {
return pipe, LocPtraceMe, 0, err1
childExitError(pipe, LocPtraceMe, err1)
}
}
@ -502,5 +479,37 @@ func forkAndExecInChild1(r *Runner, argv0 *byte, argv, env []*byte, workdir, hos
uintptr(unsafe.Pointer(&argv[0])), uintptr(unsafe.Pointer(&env[0])))
}
}
return pipe, LocExecve, 0, err1
childExitError(pipe, LocExecve, err1)
return
}
//go:nosplit
func childExitError(pipe int, loc ErrorLocation, err syscall.Errno) {
// send error code on pipe
childError := ChildError{
Err: err,
Location: loc,
}
// send error code on pipe
syscall.RawSyscall(unix.SYS_WRITE, uintptr(pipe), uintptr(unsafe.Pointer(&childError)), unsafe.Sizeof(childError))
for {
syscall.RawSyscall(syscall.SYS_EXIT, uintptr(err), 0, 0)
}
}
//go:nosplit
func childExitErrorWithIndex(pipe int, loc ErrorLocation, idx int, err syscall.Errno) {
// send error code on pipe
childError := ChildError{
Err: err,
Location: loc,
Index: idx,
}
// send error code on pipe
syscall.RawSyscall(unix.SYS_WRITE, uintptr(pipe), uintptr(unsafe.Pointer(&childError)), unsafe.Sizeof(childError))
for {
syscall.RawSyscall(syscall.SYS_EXIT, uintptr(err), 0, 0)
}
}