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Diffstat (limited to 'vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go')
-rw-r--r--vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go176
1 files changed, 85 insertions, 91 deletions
diff --git a/vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go b/vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go
index b0caac91b..dbac0cc30 100644
--- a/vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go
+++ b/vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go
@@ -20,43 +20,15 @@ import (
#include <seccomp.h>
#if SCMP_VER_MAJOR < 2
-#error Minimum supported version of Libseccomp is v2.1.0
-#elif SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 1
-#error Minimum supported version of Libseccomp is v2.1.0
+#error Minimum supported version of Libseccomp is v2.2.0
+#elif SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 2
+#error Minimum supported version of Libseccomp is v2.2.0
#endif
#define ARCH_BAD ~0
const uint32_t C_ARCH_BAD = ARCH_BAD;
-#ifndef SCMP_ARCH_AARCH64
-#define SCMP_ARCH_AARCH64 ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPS
-#define SCMP_ARCH_MIPS ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPS64
-#define SCMP_ARCH_MIPS64 ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPS64N32
-#define SCMP_ARCH_MIPS64N32 ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPSEL
-#define SCMP_ARCH_MIPSEL ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPSEL64
-#define SCMP_ARCH_MIPSEL64 ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPSEL64N32
-#define SCMP_ARCH_MIPSEL64N32 ARCH_BAD
-#endif
-
#ifndef SCMP_ARCH_PPC
#define SCMP_ARCH_PPC ARCH_BAD
#endif
@@ -101,12 +73,6 @@ const uint32_t C_ACT_ERRNO = SCMP_ACT_ERRNO(0);
const uint32_t C_ACT_TRACE = SCMP_ACT_TRACE(0);
const uint32_t C_ACT_ALLOW = SCMP_ACT_ALLOW;
-// If TSync is not supported, make sure it doesn't map to a supported filter attribute
-// Don't worry about major version < 2, the minimum version checks should catch that case
-#if SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 2
-#define SCMP_FLTATR_CTL_TSYNC _SCMP_CMP_MIN
-#endif
-
const uint32_t C_ATTRIBUTE_DEFAULT = (uint32_t)SCMP_FLTATR_ACT_DEFAULT;
const uint32_t C_ATTRIBUTE_BADARCH = (uint32_t)SCMP_FLTATR_ACT_BADARCH;
const uint32_t C_ATTRIBUTE_NNP = (uint32_t)SCMP_FLTATR_CTL_NNP;
@@ -124,25 +90,61 @@ const int C_VERSION_MAJOR = SCMP_VER_MAJOR;
const int C_VERSION_MINOR = SCMP_VER_MINOR;
const int C_VERSION_MICRO = SCMP_VER_MICRO;
+#if SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR >= 3
+unsigned int get_major_version()
+{
+ return seccomp_version()->major;
+}
+
+unsigned int get_minor_version()
+{
+ return seccomp_version()->minor;
+}
+
+unsigned int get_micro_version()
+{
+ return seccomp_version()->micro;
+}
+#else
+unsigned int get_major_version()
+{
+ return (unsigned int)C_VERSION_MAJOR;
+}
+
+unsigned int get_minor_version()
+{
+ return (unsigned int)C_VERSION_MINOR;
+}
+
+unsigned int get_micro_version()
+{
+ return (unsigned int)C_VERSION_MICRO;
+}
+#endif
+
typedef struct scmp_arg_cmp* scmp_cast_t;
-// Wrapper to create an scmp_arg_cmp struct
-void*
-make_struct_arg_cmp(
- unsigned int arg,
- int compare,
- uint64_t a,
- uint64_t b
- )
+void* make_arg_cmp_array(unsigned int length)
{
- struct scmp_arg_cmp *s = malloc(sizeof(struct scmp_arg_cmp));
+ return calloc(length, sizeof(struct scmp_arg_cmp));
+}
- s->arg = arg;
- s->op = compare;
- s->datum_a = a;
- s->datum_b = b;
+// Wrapper to add an scmp_arg_cmp struct to an existing arg_cmp array
+void add_struct_arg_cmp(
+ struct scmp_arg_cmp* arr,
+ unsigned int pos,
+ unsigned int arg,
+ int compare,
+ uint64_t a,
+ uint64_t b
+ )
+{
+ arr[pos].arg = arg;
+ arr[pos].op = compare;
+ arr[pos].datum_a = a;
+ arr[pos].datum_b = b;
- return s;
+ return;
}
*/
import "C"
@@ -177,23 +179,23 @@ var (
// Error thrown on bad filter context
errBadFilter = fmt.Errorf("filter is invalid or uninitialized")
// Constants representing library major, minor, and micro versions
- verMajor = int(C.C_VERSION_MAJOR)
- verMinor = int(C.C_VERSION_MINOR)
- verMicro = int(C.C_VERSION_MICRO)
+ verMajor = uint(C.get_major_version())
+ verMinor = uint(C.get_minor_version())
+ verMicro = uint(C.get_micro_version())
)
// Nonexported functions
// Check if library version is greater than or equal to the given one
-func checkVersionAbove(major, minor, micro int) bool {
+func checkVersionAbove(major, minor, micro uint) bool {
return (verMajor > major) ||
(verMajor == major && verMinor > minor) ||
(verMajor == major && verMinor == minor && verMicro >= micro)
}
-// Ensure that the library is supported, i.e. >= 2.1.0.
+// Ensure that the library is supported, i.e. >= 2.2.0.
func ensureSupportedVersion() error {
- if !checkVersionAbove(2, 1, 0) {
+ if !checkVersionAbove(2, 2, 0) {
return VersionError{}
}
return nil
@@ -215,13 +217,6 @@ func (f *ScmpFilter) getFilterAttr(attr scmpFilterAttr) (C.uint32_t, error) {
return 0x0, errBadFilter
}
- if !checkVersionAbove(2, 2, 0) && attr == filterAttrTsync {
- return 0x0, VersionError{
- message: "thread synchronization attribute is not supported",
- minimum: "2.2.0",
- }
- }
-
var attribute C.uint32_t
retCode := C.seccomp_attr_get(f.filterCtx, attr.toNative(), &attribute)
@@ -241,13 +236,6 @@ func (f *ScmpFilter) setFilterAttr(attr scmpFilterAttr, value C.uint32_t) error
return errBadFilter
}
- if !checkVersionAbove(2, 2, 0) && attr == filterAttrTsync {
- return VersionError{
- message: "thread synchronization attribute is not supported",
- minimum: "2.2.0",
- }
- }
-
retCode := C.seccomp_attr_set(f.filterCtx, attr.toNative(), value)
if retCode != 0 {
return syscall.Errno(-1 * retCode)
@@ -259,12 +247,9 @@ func (f *ScmpFilter) setFilterAttr(attr scmpFilterAttr, value C.uint32_t) error
// DOES NOT LOCK OR CHECK VALIDITY
// Assumes caller has already done this
// Wrapper for seccomp_rule_add_... functions
-func (f *ScmpFilter) addRuleWrapper(call ScmpSyscall, action ScmpAction, exact bool, cond C.scmp_cast_t) error {
- var length C.uint
- if cond != nil {
- length = 1
- } else {
- length = 0
+func (f *ScmpFilter) addRuleWrapper(call ScmpSyscall, action ScmpAction, exact bool, length C.uint, cond C.scmp_cast_t) error {
+ if length != 0 && cond == nil {
+ return fmt.Errorf("null conditions list, but length is nonzero")
}
var retCode C.int
@@ -275,9 +260,11 @@ func (f *ScmpFilter) addRuleWrapper(call ScmpSyscall, action ScmpAction, exact b
}
if syscall.Errno(-1*retCode) == syscall.EFAULT {
- return fmt.Errorf("unrecognized syscall")
+ return fmt.Errorf("unrecognized syscall %#x", int32(call))
} else if syscall.Errno(-1*retCode) == syscall.EPERM {
return fmt.Errorf("requested action matches default action of filter")
+ } else if syscall.Errno(-1*retCode) == syscall.EINVAL {
+ return fmt.Errorf("two checks on same syscall argument")
} else if retCode != 0 {
return syscall.Errno(-1 * retCode)
}
@@ -295,7 +282,7 @@ func (f *ScmpFilter) addRuleGeneric(call ScmpSyscall, action ScmpAction, exact b
}
if len(conds) == 0 {
- if err := f.addRuleWrapper(call, action, exact, nil); err != nil {
+ if err := f.addRuleWrapper(call, action, exact, 0, nil); err != nil {
return err
}
} else {
@@ -307,13 +294,20 @@ func (f *ScmpFilter) addRuleGeneric(call ScmpSyscall, action ScmpAction, exact b
}
}
- for _, cond := range conds {
- cmpStruct := C.make_struct_arg_cmp(C.uint(cond.Argument), cond.Op.toNative(), C.uint64_t(cond.Operand1), C.uint64_t(cond.Operand2))
- defer C.free(cmpStruct)
+ argsArr := C.make_arg_cmp_array(C.uint(len(conds)))
+ if argsArr == nil {
+ return fmt.Errorf("error allocating memory for conditions")
+ }
+ defer C.free(argsArr)
- if err := f.addRuleWrapper(call, action, exact, C.scmp_cast_t(cmpStruct)); err != nil {
- return err
- }
+ for i, cond := range conds {
+ C.add_struct_arg_cmp(C.scmp_cast_t(argsArr), C.uint(i),
+ C.uint(cond.Argument), cond.Op.toNative(),
+ C.uint64_t(cond.Operand1), C.uint64_t(cond.Operand2))
+ }
+
+ if err := f.addRuleWrapper(call, action, exact, C.uint(len(conds)), C.scmp_cast_t(argsArr)); err != nil {
+ return err
}
}
@@ -325,11 +319,11 @@ func (f *ScmpFilter) addRuleGeneric(call ScmpSyscall, action ScmpAction, exact b
// Helper - Sanitize Arch token input
func sanitizeArch(in ScmpArch) error {
if in < archStart || in > archEnd {
- return fmt.Errorf("unrecognized architecture")
+ return fmt.Errorf("unrecognized architecture %#x", uint(in))
}
if in.toNative() == C.C_ARCH_BAD {
- return fmt.Errorf("architecture is not supported on this version of the library")
+ return fmt.Errorf("architecture %v is not supported on this version of the library", in)
}
return nil
@@ -338,7 +332,7 @@ func sanitizeArch(in ScmpArch) error {
func sanitizeAction(in ScmpAction) error {
inTmp := in & 0x0000FFFF
if inTmp < actionStart || inTmp > actionEnd {
- return fmt.Errorf("unrecognized action")
+ return fmt.Errorf("unrecognized action %#x", uint(inTmp))
}
if inTmp != ActTrace && inTmp != ActErrno && (in&0xFFFF0000) != 0 {
@@ -350,7 +344,7 @@ func sanitizeAction(in ScmpAction) error {
func sanitizeCompareOp(in ScmpCompareOp) error {
if in < compareOpStart || in > compareOpEnd {
- return fmt.Errorf("unrecognized comparison operator")
+ return fmt.Errorf("unrecognized comparison operator %#x", uint(in))
}
return nil
@@ -393,7 +387,7 @@ func archFromNative(a C.uint32_t) (ScmpArch, error) {
case C.C_ARCH_S390X:
return ArchS390X, nil
default:
- return 0x0, fmt.Errorf("unrecognized architecture")
+ return 0x0, fmt.Errorf("unrecognized architecture %#x", uint32(a))
}
}
@@ -475,7 +469,7 @@ func actionFromNative(a C.uint32_t) (ScmpAction, error) {
case C.C_ACT_ALLOW:
return ActAllow, nil
default:
- return 0x0, fmt.Errorf("unrecognized action")
+ return 0x0, fmt.Errorf("unrecognized action %#x", uint32(a))
}
}