Use buildah commit and bud in podman

Vendor in buildah and use as much of commit and bug as possible for podman
build and commit.

Resolves #586
Signed-off-by: baude <bbaude@redhat.com>

Closes: #681
Approved by: mheon

2 files changed, 106 insertions, 150 deletions

diff --git a/vendor/github.com/seccomp/libseccomp-golang/seccomp.go b/vendor/github.com/seccomp/libseccomp-golang/seccomp.go
index 53bcb024d..a62741814 100644
--- a/vendor/github.com/seccomp/libseccomp-golang/seccomp.go
+++ b/vendor/github.com/seccomp/libseccomp-golang/seccomp.go
@@ -43,7 +43,7 @@ func (e VersionError) Error() string {
 	if e.minimum != "" {
 		format += e.minimum + ": "
 	} else {
-		format += "2.1.0: "
+		format += "2.2.0: "
 	}
 	format += "detected %d.%d.%d"
 	return fmt.Sprintf(format, verMajor, verMinor, verMicro)
@@ -76,8 +76,8 @@ type ScmpSyscall int32
 
 const (
 	// Valid architectures recognized by libseccomp
-	// ARM64 and all MIPS architectures are unsupported by versions of the
-	// library before v2.2 and will return errors if used
+	// PowerPC and S390(x) architectures are unavailable below library version
+	// v2.3.0 and will returns errors if used with incompatible libraries
 
 	// ArchInvalid is a placeholder to ensure uninitialized ScmpArch
 	// variables are invalid
@@ -211,7 +211,7 @@ func GetArchFromString(arch string) (ScmpArch, error) {
 	case "s390x":
 		return ArchS390X, nil
 	default:
-		return ArchInvalid, fmt.Errorf("cannot convert unrecognized string %s", arch)
+		return ArchInvalid, fmt.Errorf("cannot convert unrecognized string %q", arch)
 	}
 }
 
@@ -255,7 +255,7 @@ func (a ScmpArch) String() string {
 	case ArchInvalid:
 		return "Invalid architecture"
 	default:
-		return "Unknown architecture"
+		return fmt.Sprintf("Unknown architecture %#x", uint(a))
 	}
 }
 
@@ -279,7 +279,7 @@ func (a ScmpCompareOp) String() string {
 	case CompareInvalid:
 		return "Invalid comparison operator"
 	default:
-		return "Unrecognized comparison operator"
+		return fmt.Sprintf("Unrecognized comparison operator %#x", uint(a))
 	}
 }
 
@@ -298,7 +298,7 @@ func (a ScmpAction) String() string {
 	case ActAllow:
 		return "Action: Allow system call"
 	default:
-		return "Unrecognized Action"
+		return fmt.Sprintf("Unrecognized Action %#x", uint(a))
 	}
 }
 
@@ -324,7 +324,7 @@ func (a ScmpAction) GetReturnCode() int16 {
 // GetLibraryVersion returns the version of the library the bindings are built
 // against.
 // The version is formatted as follows: Major.Minor.Micro
-func GetLibraryVersion() (major, minor, micro int) {
+func GetLibraryVersion() (major, minor, micro uint) {
 	return verMajor, verMinor, verMicro
 }
 
@@ -350,7 +350,7 @@ func (s ScmpSyscall) GetNameByArch(arch ScmpArch) (string, error) {
 
 	cString := C.seccomp_syscall_resolve_num_arch(arch.toNative(), C.int(s))
 	if cString == nil {
-		return "", fmt.Errorf("could not resolve syscall name")
+		return "", fmt.Errorf("could not resolve syscall name for %#x", int32(s))
 	}
 	defer C.free(unsafe.Pointer(cString))
 
@@ -373,7 +373,7 @@ func GetSyscallFromName(name string) (ScmpSyscall, error) {
 
 	result := C.seccomp_syscall_resolve_name(cString)
 	if result == scmpError {
-		return 0, fmt.Errorf("could not resolve name to syscall")
+		return 0, fmt.Errorf("could not resolve name to syscall: %q", name)
 	}
 
 	return ScmpSyscall(result), nil
@@ -397,7 +397,7 @@ func GetSyscallFromNameByArch(name string, arch ScmpArch) (ScmpSyscall, error) {
 
 	result := C.seccomp_syscall_resolve_name_arch(arch.toNative(), cString)
 	if result == scmpError {
-		return 0, fmt.Errorf("could not resolve name to syscall")
+		return 0, fmt.Errorf("could not resolve name to syscall: %q on %v", name, arch)
 	}
 
 	return ScmpSyscall(result), nil
@@ -426,9 +426,9 @@ func MakeCondition(arg uint, comparison ScmpCompareOp, values ...uint64) (ScmpCo
 	if comparison == CompareInvalid {
 		return condStruct, fmt.Errorf("invalid comparison operator")
 	} else if arg > 5 {
-		return condStruct, fmt.Errorf("syscalls only have up to 6 arguments")
+		return condStruct, fmt.Errorf("syscalls only have up to 6 arguments (%d given)", arg)
 	} else if len(values) > 2 {
-		return condStruct, fmt.Errorf("conditions can have at most 2 arguments")
+		return condStruct, fmt.Errorf("conditions can have at most 2 arguments (%d given)", len(values))
 	} else if len(values) == 0 {
 		return condStruct, fmt.Errorf("must provide at least one value to compare against")
 	}
@@ -494,6 +494,13 @@ func NewFilter(defaultAction ScmpAction) (*ScmpFilter, error) {
 	filter.valid = true
 	runtime.SetFinalizer(filter, filterFinalizer)
 
+	// Enable TSync so all goroutines will receive the same rules
+	// If the kernel does not support TSYNC, allow us to continue without error
+	if err := filter.setFilterAttr(filterAttrTsync, 0x1); err != nil && err != syscall.ENOTSUP {
+		filter.Release()
+		return nil, fmt.Errorf("could not create filter - error setting tsync bit: %v", err)
+	}
+
 	return filter, nil
 }
 
@@ -550,7 +557,7 @@ func (f *ScmpFilter) Release() {
 // The source filter src will be released as part of the process, and will no
 // longer be usable or valid after this call.
 // To be merged, filters must NOT share any architectures, and all their
-// attributes (Default Action, Bad Arch Action, No New Privs and TSync bools)
+// attributes (Default Action, Bad Arch Action, and No New Privs bools)
 // must match.
 // The filter src will be merged into the filter this is called on.
 // The architectures of the src filter not present in the destination, and all
@@ -723,30 +730,6 @@ func (f *ScmpFilter) GetNoNewPrivsBit() (bool, error) {
 	return true, nil
 }
 
-// GetTsyncBit returns whether Thread Synchronization will be enabled on the
-// filter being loaded, or an error if an issue was encountered retrieving the
-// value.
-// Thread Sync ensures that all members of the thread group of the calling
-// process will share the same Seccomp filter set.
-// Tsync is a fairly recent addition to the Linux kernel and older kernels
-// lack support. If the running kernel does not support Tsync and it is
-// requested in a filter, Libseccomp will not enable TSync support and will
-// proceed as normal.
-// This function is unavailable before v2.2 of libseccomp and will return an
-// error.
-func (f *ScmpFilter) GetTsyncBit() (bool, error) {
-	tSync, err := f.getFilterAttr(filterAttrTsync)
-	if err != nil {
-		return false, err
-	}
-
-	if tSync == 0 {
-		return false, nil
-	}
-
-	return true, nil
-}
-
 // SetBadArchAction sets the default action taken on a syscall for an
 // architecture not in the filter, or an error if an issue was encountered
 // setting the value.
@@ -773,27 +756,6 @@ func (f *ScmpFilter) SetNoNewPrivsBit(state bool) error {
 	return f.setFilterAttr(filterAttrNNP, toSet)
 }
 
-// SetTsync sets whether Thread Synchronization will be enabled on the filter
-// being loaded. Returns an error if setting Tsync failed, or the filter is
-// invalid.
-// Thread Sync ensures that all members of the thread group of the calling
-// process will share the same Seccomp filter set.
-// Tsync is a fairly recent addition to the Linux kernel and older kernels
-// lack support. If the running kernel does not support Tsync and it is
-// requested in a filter, Libseccomp will not enable TSync support and will
-// proceed as normal.
-// This function is unavailable before v2.2 of libseccomp and will return an
-// error.
-func (f *ScmpFilter) SetTsync(enable bool) error {
-	var toSet C.uint32_t = 0x0
-
-	if enable {
-		toSet = 0x1
-	}
-
-	return f.setFilterAttr(filterAttrTsync, toSet)
-}
-
 // SetSyscallPriority sets a syscall's priority.
 // This provides a hint to the filter generator in libseccomp about the
 // importance of this syscall. High-priority syscalls are placed
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))
 	}
 }