Log level, optname, optval and optlen in getsockopt/setsockopt in strace.

Log 8, 16, and 32 int optvals and dump the memory of other sizes.

Updates #1782

PiperOrigin-RevId: 293889388

4 files changed, 258 insertions, 5 deletions

diff --git a/pkg/sentry/strace/linux64_amd64.go b/pkg/sentry/strace/linux64_amd64.go
index 85ec66fd3..a4de545e9 100644
--- a/pkg/sentry/strace/linux64_amd64.go
+++ b/pkg/sentry/strace/linux64_amd64.go
@@ -78,8 +78,8 @@ var linuxAMD64 = SyscallMap{
 	51:  makeSyscallInfo("getsockname", FD, PostSockAddr, SockLen),
 	52:  makeSyscallInfo("getpeername", FD, PostSockAddr, SockLen),
 	53:  makeSyscallInfo("socketpair", SockFamily, SockType, SockProtocol, Hex),
-	54:  makeSyscallInfo("setsockopt", FD, Hex, Hex, Hex, Hex),
-	55:  makeSyscallInfo("getsockopt", FD, Hex, Hex, Hex, Hex),
+	54:  makeSyscallInfo("setsockopt", FD, SockOptLevel, SockOptName, SetSockOptVal, Hex /* length by value, not a pointer */),
+	55:  makeSyscallInfo("getsockopt", FD, SockOptLevel, SockOptName, GetSockOptVal, SockLen),
 	56:  makeSyscallInfo("clone", CloneFlags, Hex, Hex, Hex, Hex),
 	57:  makeSyscallInfo("fork"),
 	58:  makeSyscallInfo("vfork"),
diff --git a/pkg/sentry/strace/socket.go b/pkg/sentry/strace/socket.go
index d2079c85f..f7ff4573e 100644
--- a/pkg/sentry/strace/socket.go
+++ b/pkg/sentry/strace/socket.go
@@ -419,3 +419,218 @@ func sockFlags(flags int32) string {
 	}
 	return SocketFlagSet.Parse(uint64(flags))
 }
+
+func getSockOptVal(t *kernel.Task, level, optname uint64, optVal usermem.Addr, optLen usermem.Addr, maximumBlobSize uint, rval uintptr) string {
+	if int(rval) < 0 {
+		return hexNum(uint64(optVal))
+	}
+	if optVal == 0 {
+		return "null"
+	}
+	l, err := copySockLen(t, optLen)
+	if err != nil {
+		return fmt.Sprintf("%#x {error reading length: %v}", optLen, err)
+	}
+	return sockOptVal(t, level, optname, optVal, uint64(l), maximumBlobSize)
+}
+
+func sockOptVal(t *kernel.Task, level, optname uint64, optVal usermem.Addr, optLen uint64, maximumBlobSize uint) string {
+	switch optLen {
+	case 1:
+		var v uint8
+		_, err := t.CopyIn(optVal, &v)
+		if err != nil {
+			return fmt.Sprintf("%#x {error reading optval: %v}", optVal, err)
+		}
+		return fmt.Sprintf("%#x {value=%v}", optVal, v)
+	case 2:
+		var v uint16
+		_, err := t.CopyIn(optVal, &v)
+		if err != nil {
+			return fmt.Sprintf("%#x {error reading optval: %v}", optVal, err)
+		}
+		return fmt.Sprintf("%#x {value=%v}", optVal, v)
+	case 4:
+		var v uint32
+		_, err := t.CopyIn(optVal, &v)
+		if err != nil {
+			return fmt.Sprintf("%#x {error reading optval: %v}", optVal, err)
+		}
+		return fmt.Sprintf("%#x {value=%v}", optVal, v)
+	default:
+		return dump(t, optVal, uint(optLen), maximumBlobSize)
+	}
+}
+
+var sockOptLevels = abi.ValueSet{
+	linux.SOL_IP:      "SOL_IP",
+	linux.SOL_SOCKET:  "SOL_SOCKET",
+	linux.SOL_TCP:     "SOL_TCP",
+	linux.SOL_UDP:     "SOL_UDP",
+	linux.SOL_IPV6:    "SOL_IPV6",
+	linux.SOL_ICMPV6:  "SOL_ICMPV6",
+	linux.SOL_RAW:     "SOL_RAW",
+	linux.SOL_PACKET:  "SOL_PACKET",
+	linux.SOL_NETLINK: "SOL_NETLINK",
+}
+
+var sockOptNames = map[uint64]abi.ValueSet{
+	linux.SOL_IP: {
+		linux.IP_TTL:                    "IP_TTL",
+		linux.IP_MULTICAST_TTL:          "IP_MULTICAST_TTL",
+		linux.IP_MULTICAST_IF:           "IP_MULTICAST_IF",
+		linux.IP_MULTICAST_LOOP:         "IP_MULTICAST_LOOP",
+		linux.IP_TOS:                    "IP_TOS",
+		linux.IP_RECVTOS:                "IP_RECVTOS",
+		linux.IPT_SO_GET_INFO:           "IPT_SO_GET_INFO",
+		linux.IPT_SO_GET_ENTRIES:        "IPT_SO_GET_ENTRIES",
+		linux.IP_ADD_MEMBERSHIP:         "IP_ADD_MEMBERSHIP",
+		linux.IP_DROP_MEMBERSHIP:        "IP_DROP_MEMBERSHIP",
+		linux.MCAST_JOIN_GROUP:          "MCAST_JOIN_GROUP",
+		linux.IP_ADD_SOURCE_MEMBERSHIP:  "IP_ADD_SOURCE_MEMBERSHIP",
+		linux.IP_BIND_ADDRESS_NO_PORT:   "IP_BIND_ADDRESS_NO_PORT",
+		linux.IP_BLOCK_SOURCE:           "IP_BLOCK_SOURCE",
+		linux.IP_CHECKSUM:               "IP_CHECKSUM",
+		linux.IP_DROP_SOURCE_MEMBERSHIP: "IP_DROP_SOURCE_MEMBERSHIP",
+		linux.IP_FREEBIND:               "IP_FREEBIND",
+		linux.IP_HDRINCL:                "IP_HDRINCL",
+		linux.IP_IPSEC_POLICY:           "IP_IPSEC_POLICY",
+		linux.IP_MINTTL:                 "IP_MINTTL",
+		linux.IP_MSFILTER:               "IP_MSFILTER",
+		linux.IP_MTU_DISCOVER:           "IP_MTU_DISCOVER",
+		linux.IP_MULTICAST_ALL:          "IP_MULTICAST_ALL",
+		linux.IP_NODEFRAG:               "IP_NODEFRAG",
+		linux.IP_OPTIONS:                "IP_OPTIONS",
+		linux.IP_PASSSEC:                "IP_PASSSEC",
+		linux.IP_PKTINFO:                "IP_PKTINFO",
+		linux.IP_RECVERR:                "IP_RECVERR",
+		linux.IP_RECVFRAGSIZE:           "IP_RECVFRAGSIZE",
+		linux.IP_RECVOPTS:               "IP_RECVOPTS",
+		linux.IP_RECVORIGDSTADDR:        "IP_RECVORIGDSTADDR",
+		linux.IP_RECVTTL:                "IP_RECVTTL",
+		linux.IP_RETOPTS:                "IP_RETOPTS",
+		linux.IP_TRANSPARENT:            "IP_TRANSPARENT",
+		linux.IP_UNBLOCK_SOURCE:         "IP_UNBLOCK_SOURCE",
+		linux.IP_UNICAST_IF:             "IP_UNICAST_IF",
+		linux.IP_XFRM_POLICY:            "IP_XFRM_POLICY",
+		linux.MCAST_BLOCK_SOURCE:        "MCAST_BLOCK_SOURCE",
+		linux.MCAST_JOIN_SOURCE_GROUP:   "MCAST_JOIN_SOURCE_GROUP",
+		linux.MCAST_LEAVE_GROUP:         "MCAST_LEAVE_GROUP",
+		linux.MCAST_LEAVE_SOURCE_GROUP:  "MCAST_LEAVE_SOURCE_GROUP",
+		linux.MCAST_MSFILTER:            "MCAST_MSFILTER",
+		linux.MCAST_UNBLOCK_SOURCE:      "MCAST_UNBLOCK_SOURCE",
+		linux.IP_ROUTER_ALERT:           "IP_ROUTER_ALERT",
+		linux.IP_PKTOPTIONS:             "IP_PKTOPTIONS",
+		linux.IP_MTU:                    "IP_MTU",
+	},
+	linux.SOL_SOCKET: {
+		linux.SO_ERROR:        "SO_ERROR",
+		linux.SO_PEERCRED:     "SO_PEERCRED",
+		linux.SO_PASSCRED:     "SO_PASSCRED",
+		linux.SO_SNDBUF:       "SO_SNDBUF",
+		linux.SO_RCVBUF:       "SO_RCVBUF",
+		linux.SO_REUSEADDR:    "SO_REUSEADDR",
+		linux.SO_REUSEPORT:    "SO_REUSEPORT",
+		linux.SO_BINDTODEVICE: "SO_BINDTODEVICE",
+		linux.SO_BROADCAST:    "SO_BROADCAST",
+		linux.SO_KEEPALIVE:    "SO_KEEPALIVE",
+		linux.SO_LINGER:       "SO_LINGER",
+		linux.SO_SNDTIMEO:     "SO_SNDTIMEO",
+		linux.SO_RCVTIMEO:     "SO_RCVTIMEO",
+		linux.SO_OOBINLINE:    "SO_OOBINLINE",
+		linux.SO_TIMESTAMP:    "SO_TIMESTAMP",
+	},
+	linux.SOL_TCP: {
+		linux.TCP_NODELAY:              "TCP_NODELAY",
+		linux.TCP_CORK:                 "TCP_CORK",
+		linux.TCP_QUICKACK:             "TCP_QUICKACK",
+		linux.TCP_MAXSEG:               "TCP_MAXSEG",
+		linux.TCP_KEEPIDLE:             "TCP_KEEPIDLE",
+		linux.TCP_KEEPINTVL:            "TCP_KEEPINTVL",
+		linux.TCP_USER_TIMEOUT:         "TCP_USER_TIMEOUT",
+		linux.TCP_INFO:                 "TCP_INFO",
+		linux.TCP_CC_INFO:              "TCP_CC_INFO",
+		linux.TCP_NOTSENT_LOWAT:        "TCP_NOTSENT_LOWAT",
+		linux.TCP_ZEROCOPY_RECEIVE:     "TCP_ZEROCOPY_RECEIVE",
+		linux.TCP_CONGESTION:           "TCP_CONGESTION",
+		linux.TCP_LINGER2:              "TCP_LINGER2",
+		linux.TCP_DEFER_ACCEPT:         "TCP_DEFER_ACCEPT",
+		linux.TCP_REPAIR_OPTIONS:       "TCP_REPAIR_OPTIONS",
+		linux.TCP_INQ:                  "TCP_INQ",
+		linux.TCP_FASTOPEN:             "TCP_FASTOPEN",
+		linux.TCP_FASTOPEN_CONNECT:     "TCP_FASTOPEN_CONNECT",
+		linux.TCP_FASTOPEN_KEY:         "TCP_FASTOPEN_KEY",
+		linux.TCP_FASTOPEN_NO_COOKIE:   "TCP_FASTOPEN_NO_COOKIE",
+		linux.TCP_KEEPCNT:              "TCP_KEEPCNT",
+		linux.TCP_QUEUE_SEQ:            "TCP_QUEUE_SEQ",
+		linux.TCP_REPAIR:               "TCP_REPAIR",
+		linux.TCP_REPAIR_QUEUE:         "TCP_REPAIR_QUEUE",
+		linux.TCP_REPAIR_WINDOW:        "TCP_REPAIR_WINDOW",
+		linux.TCP_SAVED_SYN:            "TCP_SAVED_SYN",
+		linux.TCP_SAVE_SYN:             "TCP_SAVE_SYN",
+		linux.TCP_SYNCNT:               "TCP_SYNCNT",
+		linux.TCP_THIN_DUPACK:          "TCP_THIN_DUPACK",
+		linux.TCP_THIN_LINEAR_TIMEOUTS: "TCP_THIN_LINEAR_TIMEOUTS",
+		linux.TCP_TIMESTAMP:            "TCP_TIMESTAMP",
+		linux.TCP_ULP:                  "TCP_ULP",
+		linux.TCP_WINDOW_CLAMP:         "TCP_WINDOW_CLAMP",
+	},
+	linux.SOL_IPV6: {
+		linux.IPV6_V6ONLY:              "IPV6_V6ONLY",
+		linux.IPV6_PATHMTU:             "IPV6_PATHMTU",
+		linux.IPV6_TCLASS:              "IPV6_TCLASS",
+		linux.IPV6_ADD_MEMBERSHIP:      "IPV6_ADD_MEMBERSHIP",
+		linux.IPV6_DROP_MEMBERSHIP:     "IPV6_DROP_MEMBERSHIP",
+		linux.IPV6_IPSEC_POLICY:        "IPV6_IPSEC_POLICY",
+		linux.IPV6_JOIN_ANYCAST:        "IPV6_JOIN_ANYCAST",
+		linux.IPV6_LEAVE_ANYCAST:       "IPV6_LEAVE_ANYCAST",
+		linux.IPV6_PKTINFO:             "IPV6_PKTINFO",
+		linux.IPV6_ROUTER_ALERT:        "IPV6_ROUTER_ALERT",
+		linux.IPV6_XFRM_POLICY:         "IPV6_XFRM_POLICY",
+		linux.MCAST_BLOCK_SOURCE:       "MCAST_BLOCK_SOURCE",
+		linux.MCAST_JOIN_GROUP:         "MCAST_JOIN_GROUP",
+		linux.MCAST_JOIN_SOURCE_GROUP:  "MCAST_JOIN_SOURCE_GROUP",
+		linux.MCAST_LEAVE_GROUP:        "MCAST_LEAVE_GROUP",
+		linux.MCAST_LEAVE_SOURCE_GROUP: "MCAST_LEAVE_SOURCE_GROUP",
+		linux.MCAST_UNBLOCK_SOURCE:     "MCAST_UNBLOCK_SOURCE",
+		linux.IPV6_2292DSTOPTS:         "IPV6_2292DSTOPTS",
+		linux.IPV6_2292HOPLIMIT:        "IPV6_2292HOPLIMIT",
+		linux.IPV6_2292HOPOPTS:         "IPV6_2292HOPOPTS",
+		linux.IPV6_2292PKTINFO:         "IPV6_2292PKTINFO",
+		linux.IPV6_2292PKTOPTIONS:      "IPV6_2292PKTOPTIONS",
+		linux.IPV6_2292RTHDR:           "IPV6_2292RTHDR",
+		linux.IPV6_ADDR_PREFERENCES:    "IPV6_ADDR_PREFERENCES",
+		linux.IPV6_AUTOFLOWLABEL:       "IPV6_AUTOFLOWLABEL",
+		linux.IPV6_DONTFRAG:            "IPV6_DONTFRAG",
+		linux.IPV6_DSTOPTS:             "IPV6_DSTOPTS",
+		linux.IPV6_FLOWINFO:            "IPV6_FLOWINFO",
+		linux.IPV6_FLOWINFO_SEND:       "IPV6_FLOWINFO_SEND",
+		linux.IPV6_FLOWLABEL_MGR:       "IPV6_FLOWLABEL_MGR",
+		linux.IPV6_FREEBIND:            "IPV6_FREEBIND",
+		linux.IPV6_HOPOPTS:             "IPV6_HOPOPTS",
+		linux.IPV6_MINHOPCOUNT:         "IPV6_MINHOPCOUNT",
+		linux.IPV6_MTU:                 "IPV6_MTU",
+		linux.IPV6_MTU_DISCOVER:        "IPV6_MTU_DISCOVER",
+		linux.IPV6_MULTICAST_ALL:       "IPV6_MULTICAST_ALL",
+		linux.IPV6_MULTICAST_HOPS:      "IPV6_MULTICAST_HOPS",
+		linux.IPV6_MULTICAST_IF:        "IPV6_MULTICAST_IF",
+		linux.IPV6_MULTICAST_LOOP:      "IPV6_MULTICAST_LOOP",
+		linux.IPV6_RECVDSTOPTS:         "IPV6_RECVDSTOPTS",
+		linux.IPV6_RECVERR:             "IPV6_RECVERR",
+		linux.IPV6_RECVFRAGSIZE:        "IPV6_RECVFRAGSIZE",
+		linux.IPV6_RECVHOPLIMIT:        "IPV6_RECVHOPLIMIT",
+		linux.IPV6_RECVHOPOPTS:         "IPV6_RECVHOPOPTS",
+		linux.IPV6_RECVORIGDSTADDR:     "IPV6_RECVORIGDSTADDR",
+		linux.IPV6_RECVPATHMTU:         "IPV6_RECVPATHMTU",
+		linux.IPV6_RECVPKTINFO:         "IPV6_RECVPKTINFO",
+		linux.IPV6_RECVRTHDR:           "IPV6_RECVRTHDR",
+		linux.IPV6_RECVTCLASS:          "IPV6_RECVTCLASS",
+		linux.IPV6_RTHDR:               "IPV6_RTHDR",
+		linux.IPV6_RTHDRDSTOPTS:        "IPV6_RTHDRDSTOPTS",
+		linux.IPV6_TRANSPARENT:         "IPV6_TRANSPARENT",
+		linux.IPV6_UNICAST_HOPS:        "IPV6_UNICAST_HOPS",
+		linux.IPV6_UNICAST_IF:          "IPV6_UNICAST_IF",
+		linux.MCAST_MSFILTER:           "MCAST_MSFILTER",
+		linux.IPV6_ADDRFORM:            "IPV6_ADDRFORM",
+	},
+}
diff --git a/pkg/sentry/strace/strace.go b/pkg/sentry/strace/strace.go
index 3fc4a47fc..a796b2396 100644
--- a/pkg/sentry/strace/strace.go
+++ b/pkg/sentry/strace/strace.go
@@ -55,6 +55,14 @@ var ItimerTypes = abi.ValueSet{
 	linux.ITIMER_PROF:    "ITIMER_PROF",
 }
 
+func hexNum(num uint64) string {
+	return "0x" + strconv.FormatUint(num, 16)
+}
+
+func hexArg(arg arch.SyscallArgument) string {
+	return hexNum(arg.Uint64())
+}
+
 func iovecs(t *kernel.Task, addr usermem.Addr, iovcnt int, printContent bool, maxBytes uint64) string {
 	if iovcnt < 0 || iovcnt > linux.UIO_MAXIOV {
 		return fmt.Sprintf("%#x (error decoding iovecs: invalid iovcnt)", addr)
@@ -389,6 +397,12 @@ func (i *SyscallInfo) pre(t *kernel.Task, args arch.SyscallArguments, maximumBlo
 			output = append(output, path(t, args[arg].Pointer()))
 		case ExecveStringVector:
 			output = append(output, stringVector(t, args[arg].Pointer()))
+		case SetSockOptVal:
+			output = append(output, sockOptVal(t, args[arg-2].Uint64() /* level */, args[arg-1].Uint64() /* optName */, args[arg].Pointer() /* optVal */, args[arg+1].Uint64() /* optLen */, maximumBlobSize))
+		case SockOptLevel:
+			output = append(output, sockOptLevels.Parse(args[arg].Uint64()))
+		case SockOptName:
+			output = append(output, sockOptNames[args[arg-1].Uint64() /* level */].Parse(args[arg].Uint64()))
 		case SockAddr:
 			output = append(output, sockAddr(t, args[arg].Pointer(), uint32(args[arg+1].Uint64())))
 		case SockLen:
@@ -446,7 +460,7 @@ func (i *SyscallInfo) pre(t *kernel.Task, args arch.SyscallArguments, maximumBlo
 		case Hex:
 			fallthrough
 		default:
-			output = append(output, "0x"+strconv.FormatUint(args[arg].Uint64(), 16))
+			output = append(output, hexArg(args[arg]))
 		}
 	}
 
@@ -507,6 +521,12 @@ func (i *SyscallInfo) post(t *kernel.Task, args arch.SyscallArguments, rval uint
 			output[arg] = capData(t, args[arg-1].Pointer(), args[arg].Pointer())
 		case PollFDs:
 			output[arg] = pollFDs(t, args[arg].Pointer(), uint(args[arg+1].Uint()), true)
+		case GetSockOptVal:
+			output[arg] = getSockOptVal(t, args[arg-2].Uint64() /* level */, args[arg-1].Uint64() /* optName */, args[arg].Pointer() /* optVal */, args[arg+1].Pointer() /* optLen */, maximumBlobSize, rval)
+		case SetSockOptVal:
+			// No need to print the value again. While it usually
+			// isn't, the string version of this arg can be long.
+			output[arg] = hexArg(args[arg])
 		}
 	}
 }
diff --git a/pkg/sentry/strace/syscalls.go b/pkg/sentry/strace/syscalls.go
index 24e29a2ba..446d1e0f6 100644
--- a/pkg/sentry/strace/syscalls.go
+++ b/pkg/sentry/strace/syscalls.go
@@ -207,9 +207,27 @@ const (
 	// array is in the next argument.
 	PollFDs
 
-	// SelectFDSet is an fd_set argument in select(2)/pselect(2). The number of
-	// fds represented must be the first argument.
+	// SelectFDSet is an fd_set argument in select(2)/pselect(2). The
+	// number of FDs represented must be the first argument.
 	SelectFDSet
+
+	// GetSockOptVal is the optval argument in getsockopt(2).
+	//
+	// Formatted after syscall execution.
+	GetSockOptVal
+
+	// SetSockOptVal is the optval argument in setsockopt(2).
+	//
+	// Contents omitted after syscall execution.
+	SetSockOptVal
+
+	// SockOptLevel is the level argument in getsockopt(2) and
+	// setsockopt(2).
+	SockOptLevel
+
+	// SockOptLevel is the optname argument in getsockopt(2) and
+	// setsockopt(2).
+	SockOptName
 )
 
 // defaultFormat is the syscall argument format to use if the actual format is