sys/linux: add syz_init_net_socket syscall

The new pseudo syscall allows opening sockets that can only
be created in init net namespace (BLUETOOTH, NFC, LLC).
Use it to open these sockets.

Unfortunately this only works with sandbox none at the moment.
The problem is that setns of a network namespace requires CAP_SYS_ADMIN
in the target namespace, and we've lost all privs in the init namespace
during creation of a user namespace.

1 files changed, 44 insertions, 48 deletions

diff --git a/executor/syscalls_linux.h b/executor/syscalls_linux.h
index 84b97645f..22efa192b 100644
--- a/executor/syscalls_linux.h
+++ b/executor/syscalls_linux.h
@@ -2,7 +2,7 @@
 
 #if defined(__i386__) || 0
 #define GOARCH "386"
-#define SYZ_REVISION "83da58aa1a9a2171aa34196065470a80047bd263"
+#define SYZ_REVISION "438ceebbeee4b8331ecafae07e85a8079120816c"
 #define SYZ_PAGE_SIZE 4096
 #define SYZ_NUM_PAGES 4096
 #define SYZ_DATA_OFFSET 536870912
@@ -11,6 +11,7 @@ call_t syscalls[] = {
     {"accept4", 364},
     {"accept4$alg", 364},
     {"accept4$ax25", 364},
+    {"accept4$bt_l2cap", 364},
     {"accept4$inet", 364},
     {"accept4$inet6", 364},
     {"accept4$ipx", 364},
@@ -1447,11 +1448,8 @@ call_t syscalls[] = {
     {"socket$ax25", 359},
     {"socket$bt_bnep", 359},
     {"socket$bt_cmtp", 359},
-    {"socket$bt_hci", 359},
     {"socket$bt_hidp", 359},
-    {"socket$bt_l2cap", 359},
     {"socket$bt_rfcomm", 359},
-    {"socket$bt_sco", 359},
     {"socket$can_bcm", 359},
     {"socket$can_raw", 359},
     {"socket$inet", 359},
@@ -1473,11 +1471,8 @@ call_t syscalls[] = {
     {"socket$kcm", 359},
     {"socket$key", 359},
     {"socket$l2tp", 359},
-    {"socket$llc", 359},
     {"socket$netlink", 359},
     {"socket$netrom", 359},
-    {"socket$nfc_llcp", 359},
-    {"socket$nfc_raw", 359},
     {"socket$nl_crypto", 359},
     {"socket$nl_generic", 359},
     {"socket$nl_netfilter", 359},
@@ -1508,7 +1503,6 @@ call_t syscalls[] = {
     {"socketpair$inet_tcp", 360},
     {"socketpair$inet_udp", 360},
     {"socketpair$ipx", 360},
-    {"socketpair$llc", 360},
     {"socketpair$packet", 360},
     {"socketpair$unix", 360},
     {"splice", 313},
@@ -1530,6 +1524,12 @@ call_t syscalls[] = {
     {"syz_extract_tcp_res$synack", 0, (syscall_t)syz_extract_tcp_res},
     {"syz_fuse_mount", 0, (syscall_t)syz_fuse_mount},
     {"syz_fuseblk_mount", 0, (syscall_t)syz_fuseblk_mount},
+    {"syz_init_net_socket$bt_hci", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_l2cap", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_sco", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$llc", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_llcp", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_raw", 0, (syscall_t)syz_init_net_socket},
     {"syz_kvm_setup_cpu$arm64", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_kvm_setup_cpu$x86", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_open_dev$admmidi", 0, (syscall_t)syz_open_dev},
@@ -1615,11 +1615,11 @@ call_t syscalls[] = {
 
 #if defined(__x86_64__) || 0
 #define GOARCH "amd64"
-#define SYZ_REVISION "6ec7ea7963734bf917737585902619bc1d3aebe8"
+#define SYZ_REVISION "00ff1c6d3a163fa16b597ce6edab9c4956129d09"
 #define SYZ_PAGE_SIZE 4096
 #define SYZ_NUM_PAGES 4096
 #define SYZ_DATA_OFFSET 536870912
-unsigned syscall_count = 1654;
+unsigned syscall_count = 1653;
 call_t syscalls[] = {
     {"accept", 43},
     {"accept$alg", 43},
@@ -1627,7 +1627,6 @@ call_t syscalls[] = {
     {"accept$inet", 43},
     {"accept$inet6", 43},
     {"accept$ipx", 43},
-    {"accept$llc", 43},
     {"accept$netrom", 43},
     {"accept$nfc_llcp", 43},
     {"accept$packet", 43},
@@ -1635,6 +1634,7 @@ call_t syscalls[] = {
     {"accept4", 288},
     {"accept4$alg", 288},
     {"accept4$ax25", 288},
+    {"accept4$bt_l2cap", 288},
     {"accept4$inet", 288},
     {"accept4$inet6", 288},
     {"accept4$ipx", 288},
@@ -3113,11 +3113,8 @@ call_t syscalls[] = {
     {"socket$ax25", 41},
     {"socket$bt_bnep", 41},
     {"socket$bt_cmtp", 41},
-    {"socket$bt_hci", 41},
     {"socket$bt_hidp", 41},
-    {"socket$bt_l2cap", 41},
     {"socket$bt_rfcomm", 41},
-    {"socket$bt_sco", 41},
     {"socket$can_bcm", 41},
     {"socket$can_raw", 41},
     {"socket$inet", 41},
@@ -3139,11 +3136,8 @@ call_t syscalls[] = {
     {"socket$kcm", 41},
     {"socket$key", 41},
     {"socket$l2tp", 41},
-    {"socket$llc", 41},
     {"socket$netlink", 41},
     {"socket$netrom", 41},
-    {"socket$nfc_llcp", 41},
-    {"socket$nfc_raw", 41},
     {"socket$nl_crypto", 41},
     {"socket$nl_generic", 41},
     {"socket$nl_netfilter", 41},
@@ -3174,7 +3168,6 @@ call_t syscalls[] = {
     {"socketpair$inet_tcp", 53},
     {"socketpair$inet_udp", 53},
     {"socketpair$ipx", 53},
-    {"socketpair$llc", 53},
     {"socketpair$packet", 53},
     {"socketpair$unix", 53},
     {"splice", 275},
@@ -3196,6 +3189,12 @@ call_t syscalls[] = {
     {"syz_extract_tcp_res$synack", 0, (syscall_t)syz_extract_tcp_res},
     {"syz_fuse_mount", 0, (syscall_t)syz_fuse_mount},
     {"syz_fuseblk_mount", 0, (syscall_t)syz_fuseblk_mount},
+    {"syz_init_net_socket$bt_hci", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_l2cap", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_sco", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$llc", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_llcp", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_raw", 0, (syscall_t)syz_init_net_socket},
     {"syz_kvm_setup_cpu$arm64", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_kvm_setup_cpu$x86", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_open_dev$admmidi", 0, (syscall_t)syz_open_dev},
@@ -3281,11 +3280,11 @@ call_t syscalls[] = {
 
 #if defined(__arm__) || 0
 #define GOARCH "arm"
-#define SYZ_REVISION "04dc857071f8d43f6f79aea2320270be4e1d805e"
+#define SYZ_REVISION "5a1569893cefa812603d4f4627986d19ddff1708"
 #define SYZ_PAGE_SIZE 4096
 #define SYZ_NUM_PAGES 4096
 #define SYZ_DATA_OFFSET 536870912
-unsigned syscall_count = 1605;
+unsigned syscall_count = 1604;
 call_t syscalls[] = {
     {"accept", 285},
     {"accept$alg", 285},
@@ -3293,7 +3292,6 @@ call_t syscalls[] = {
     {"accept$inet", 285},
     {"accept$inet6", 285},
     {"accept$ipx", 285},
-    {"accept$llc", 285},
     {"accept$netrom", 285},
     {"accept$nfc_llcp", 285},
     {"accept$packet", 285},
@@ -3301,6 +3299,7 @@ call_t syscalls[] = {
     {"accept4", 366},
     {"accept4$alg", 366},
     {"accept4$ax25", 366},
+    {"accept4$bt_l2cap", 366},
     {"accept4$inet", 366},
     {"accept4$inet6", 366},
     {"accept4$ipx", 366},
@@ -4735,11 +4734,8 @@ call_t syscalls[] = {
     {"socket$ax25", 281},
     {"socket$bt_bnep", 281},
     {"socket$bt_cmtp", 281},
-    {"socket$bt_hci", 281},
     {"socket$bt_hidp", 281},
-    {"socket$bt_l2cap", 281},
     {"socket$bt_rfcomm", 281},
-    {"socket$bt_sco", 281},
     {"socket$can_bcm", 281},
     {"socket$can_raw", 281},
     {"socket$inet", 281},
@@ -4760,11 +4756,8 @@ call_t syscalls[] = {
     {"socket$kcm", 281},
     {"socket$key", 281},
     {"socket$l2tp", 281},
-    {"socket$llc", 281},
     {"socket$netlink", 281},
     {"socket$netrom", 281},
-    {"socket$nfc_llcp", 281},
-    {"socket$nfc_raw", 281},
     {"socket$nl_crypto", 281},
     {"socket$nl_generic", 281},
     {"socket$nl_netfilter", 281},
@@ -4794,7 +4787,6 @@ call_t syscalls[] = {
     {"socketpair$inet_tcp", 288},
     {"socketpair$inet_udp", 288},
     {"socketpair$ipx", 288},
-    {"socketpair$llc", 288},
     {"socketpair$packet", 288},
     {"socketpair$unix", 288},
     {"splice", 340},
@@ -4815,6 +4807,12 @@ call_t syscalls[] = {
     {"syz_extract_tcp_res$synack", 0, (syscall_t)syz_extract_tcp_res},
     {"syz_fuse_mount", 0, (syscall_t)syz_fuse_mount},
     {"syz_fuseblk_mount", 0, (syscall_t)syz_fuseblk_mount},
+    {"syz_init_net_socket$bt_hci", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_l2cap", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_sco", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$llc", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_llcp", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_raw", 0, (syscall_t)syz_init_net_socket},
     {"syz_kvm_setup_cpu$arm64", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_kvm_setup_cpu$x86", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_open_dev$admmidi", 0, (syscall_t)syz_open_dev},
@@ -4898,11 +4896,11 @@ call_t syscalls[] = {
 
 #if defined(__aarch64__) || 0
 #define GOARCH "arm64"
-#define SYZ_REVISION "aec80f2e3bd0e72836bcd14211b2bfa408cb0a97"
+#define SYZ_REVISION "c468a4ea718d49a30529c85ce2ffe57859d18d1c"
 #define SYZ_PAGE_SIZE 4096
 #define SYZ_NUM_PAGES 4096
 #define SYZ_DATA_OFFSET 536870912
-unsigned syscall_count = 1583;
+unsigned syscall_count = 1582;
 call_t syscalls[] = {
     {"accept", 202},
     {"accept$alg", 202},
@@ -4910,7 +4908,6 @@ call_t syscalls[] = {
     {"accept$inet", 202},
     {"accept$inet6", 202},
     {"accept$ipx", 202},
-    {"accept$llc", 202},
     {"accept$netrom", 202},
     {"accept$nfc_llcp", 202},
     {"accept$packet", 202},
@@ -4918,6 +4915,7 @@ call_t syscalls[] = {
     {"accept4", 242},
     {"accept4$alg", 242},
     {"accept4$ax25", 242},
+    {"accept4$bt_l2cap", 242},
     {"accept4$inet", 242},
     {"accept4$inet6", 242},
     {"accept4$ipx", 242},
@@ -6336,11 +6334,8 @@ call_t syscalls[] = {
     {"socket$ax25", 198},
     {"socket$bt_bnep", 198},
     {"socket$bt_cmtp", 198},
-    {"socket$bt_hci", 198},
     {"socket$bt_hidp", 198},
-    {"socket$bt_l2cap", 198},
     {"socket$bt_rfcomm", 198},
-    {"socket$bt_sco", 198},
     {"socket$can_bcm", 198},
     {"socket$can_raw", 198},
     {"socket$inet", 198},
@@ -6362,11 +6357,8 @@ call_t syscalls[] = {
     {"socket$kcm", 198},
     {"socket$key", 198},
     {"socket$l2tp", 198},
-    {"socket$llc", 198},
     {"socket$netlink", 198},
     {"socket$netrom", 198},
-    {"socket$nfc_llcp", 198},
-    {"socket$nfc_raw", 198},
     {"socket$nl_crypto", 198},
     {"socket$nl_generic", 198},
     {"socket$nl_netfilter", 198},
@@ -6397,7 +6389,6 @@ call_t syscalls[] = {
     {"socketpair$inet_tcp", 199},
     {"socketpair$inet_udp", 199},
     {"socketpair$ipx", 199},
-    {"socketpair$llc", 199},
     {"socketpair$packet", 199},
     {"socketpair$unix", 199},
     {"splice", 76},
@@ -6414,6 +6405,12 @@ call_t syscalls[] = {
     {"syz_extract_tcp_res$synack", 0, (syscall_t)syz_extract_tcp_res},
     {"syz_fuse_mount", 0, (syscall_t)syz_fuse_mount},
     {"syz_fuseblk_mount", 0, (syscall_t)syz_fuseblk_mount},
+    {"syz_init_net_socket$bt_hci", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_l2cap", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_sco", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$llc", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_llcp", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_raw", 0, (syscall_t)syz_init_net_socket},
     {"syz_kvm_setup_cpu$arm64", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_kvm_setup_cpu$x86", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_open_dev$admmidi", 0, (syscall_t)syz_open_dev},
@@ -6493,11 +6490,11 @@ call_t syscalls[] = {
 
 #if defined(__ppc64__) || defined(__PPC64__) || defined(__powerpc64__) || 0
 #define GOARCH "ppc64le"
-#define SYZ_REVISION "9860271e4b0a00849f2d402585a806fea72af527"
+#define SYZ_REVISION "b7dc281161fc5fcef8cef3878a5dd2dbbd7c45d5"
 #define SYZ_PAGE_SIZE 4096
 #define SYZ_NUM_PAGES 4096
 #define SYZ_DATA_OFFSET 536870912
-unsigned syscall_count = 1573;
+unsigned syscall_count = 1572;
 call_t syscalls[] = {
     {"accept", 330},
     {"accept$alg", 330},
@@ -6505,7 +6502,6 @@ call_t syscalls[] = {
     {"accept$inet", 330},
     {"accept$inet6", 330},
     {"accept$ipx", 330},
-    {"accept$llc", 330},
     {"accept$netrom", 330},
     {"accept$nfc_llcp", 330},
     {"accept$packet", 330},
@@ -6513,6 +6509,7 @@ call_t syscalls[] = {
     {"accept4", 344},
     {"accept4$alg", 344},
     {"accept4$ax25", 344},
+    {"accept4$bt_l2cap", 344},
     {"accept4$inet", 344},
     {"accept4$inet6", 344},
     {"accept4$ipx", 344},
@@ -7911,11 +7908,8 @@ call_t syscalls[] = {
     {"socket$ax25", 326},
     {"socket$bt_bnep", 326},
     {"socket$bt_cmtp", 326},
-    {"socket$bt_hci", 326},
     {"socket$bt_hidp", 326},
-    {"socket$bt_l2cap", 326},
     {"socket$bt_rfcomm", 326},
-    {"socket$bt_sco", 326},
     {"socket$can_bcm", 326},
     {"socket$can_raw", 326},
     {"socket$inet", 326},
@@ -7937,11 +7931,8 @@ call_t syscalls[] = {
     {"socket$kcm", 326},
     {"socket$key", 326},
     {"socket$l2tp", 326},
-    {"socket$llc", 326},
     {"socket$netlink", 326},
     {"socket$netrom", 326},
-    {"socket$nfc_llcp", 326},
-    {"socket$nfc_raw", 326},
     {"socket$nl_crypto", 326},
     {"socket$nl_generic", 326},
     {"socket$nl_netfilter", 326},
@@ -7972,7 +7963,6 @@ call_t syscalls[] = {
     {"socketpair$inet_tcp", 333},
     {"socketpair$inet_udp", 333},
     {"socketpair$ipx", 333},
-    {"socketpair$llc", 333},
     {"socketpair$packet", 333},
     {"socketpair$unix", 333},
     {"splice", 283},
@@ -7993,6 +7983,12 @@ call_t syscalls[] = {
     {"syz_extract_tcp_res$synack", 0, (syscall_t)syz_extract_tcp_res},
     {"syz_fuse_mount", 0, (syscall_t)syz_fuse_mount},
     {"syz_fuseblk_mount", 0, (syscall_t)syz_fuseblk_mount},
+    {"syz_init_net_socket$bt_hci", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_l2cap", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$bt_sco", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$llc", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_llcp", 0, (syscall_t)syz_init_net_socket},
+    {"syz_init_net_socket$nfc_raw", 0, (syscall_t)syz_init_net_socket},
     {"syz_kvm_setup_cpu$arm64", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_kvm_setup_cpu$x86", 0, (syscall_t)syz_kvm_setup_cpu},
     {"syz_open_dev$admmidi", 0, (syscall_t)syz_open_dev},