// https://syzkaller.appspot.com/bug?id=c5418ebb2b54af3d4dd5db6958e70589905f6445 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \ *(type*)(addr) = \ htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \ (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) uint64_t r[8] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // openat$tun arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd) // } // flags: open_flags = 0x0 (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd_tun memcpy((void*)0x200000000240, "/dev/net/tun\000", 13); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000240ul, /*flags=*/0, /*mode=*/0); if (res != -1) r[0] = res; // ioctl$TUNSETIFF arguments: [ // fd: fd_tun (resource) // cmd: const = 0x400454ca (4 bytes) // arg: ptr[in, ifreq_dev_t[devnames, flags[tun_setiff_flags, int16]]] { // ifreq_dev_t[devnames, flags[tun_setiff_flags, int16]] { // ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00} // (length 0x10) elem: tun_setiff_flags = 0x7101 (2 bytes) pad = 0x0 // (22 bytes) // } // } // ] memcpy((void*)0x200000000040, "syzkaller0\000\000\000\000\000\000", 16); *(uint16_t*)0x200000000050 = 0x7101; syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x400454ca, /*arg=*/0x200000000040ul); // socket$unix arguments: [ // domain: const = 0x1 (8 bytes) // type: unix_socket_type = 0x1 (8 bytes) // proto: const = 0x0 (4 bytes) // ] // returns sock_unix res = syscall(__NR_socket, /*domain=*/1ul, /*type=SOCK_STREAM*/ 1ul, /*proto=*/0); if (res != -1) r[1] = res; // socket arguments: [ // domain: socket_domain = 0x400000000010 (8 bytes) // type: socket_type = 0x3 (8 bytes) // proto: int32 = 0x0 (4 bytes) // ] // returns sock res = syscall(__NR_socket, /*domain=AF_NETLINK|0x400000000000*/ 0x400000000010ul, /*type=SOCK_RAW*/ 3ul, /*proto=*/0); if (res != -1) r[2] = res; // socket$unix arguments: [ // domain: const = 0x1 (8 bytes) // type: unix_socket_type = 0x1 (8 bytes) // proto: const = 0x0 (4 bytes) // ] // returns sock_unix res = syscall(__NR_socket, /*domain=*/1ul, /*type=SOCK_STREAM*/ 1ul, /*proto=*/0); if (res != -1) r[3] = res; // ioctl$sock_SIOCGIFINDEX arguments: [ // fd: sock (resource) // cmd: const = 0x8933 (4 bytes) // arg: ptr[out, ifreq_dev_t[devnames, ifindex]] { // ifreq_dev_t[devnames, ifindex] { // ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00} // (length 0x10) elem: ifindex (resource) pad = 0x0 (20 bytes) // } // } // ] memcpy((void*)0x200000000100, "syzkaller0\000\000\000\000\000\000", 16); res = syscall(__NR_ioctl, /*fd=*/r[3], /*cmd=*/0x8933, /*arg=*/0x200000000100ul); if (res != -1) r[4] = *(uint32_t*)0x200000000110; // sendmsg$nl_route_sched arguments: [ // fd: sock_nl_route (resource) // msg: ptr[in, msghdr_netlink[netlink_msg_route_sched]] { // msghdr_netlink[netlink_msg_route_sched] { // addr: nil // addrlen: len = 0x0 (4 bytes) // pad = 0x0 (4 bytes) // vec: ptr[in, iovec[in, netlink_msg_route_sched]] { // iovec[in, netlink_msg_route_sched] { // addr: ptr[in, netlink_msg_route_sched] { // union netlink_msg_route_sched { // newqdisc: netlink_msg_t[const[RTM_NEWQDISC, int16], // tcmsg[AF_UNSPEC], rtm_tca_policy] { // len: len = 0x38 (4 bytes) // type: const = 0x24 (2 bytes) // flags: netlink_msg_flags = 0x4ee4e6a52ff56541 (2 bytes) // seq: int32 = 0x70bd2a (4 bytes) // pid: int32 = 0xfffffffd (4 bytes) // payload: tcmsg[AF_UNSPEC] { // family: const = 0x0 (1 bytes) // tcm__pad1: const = 0x0 (1 bytes) // tcm__pad2: const = 0x0 (2 bytes) // ifindex: ifindex (resource) // tcm_handle: tcm_handle { // minor: tcm_handle_offsets = 0x0 (2 bytes) // major: tcm_handle_offsets = 0x1 (2 bytes) // } // tcm_parent: tcm_handle { // minor: tcm_handle_offsets = 0xffff (2 bytes) // major: tcm_handle_offsets = 0xffff (2 bytes) // } // tcm_info: tcm_handle { // minor: tcm_handle_offsets = 0xffe0 (2 bytes) // major: tcm_handle_offsets = 0x9 (2 bytes) // } // } // attrs: array[rtm_tca_policy] { // union rtm_tca_policy { // qdisc_kind_options: union qdisc_kind_options { // q_multiq: tca_kind_options_t["multiq", // tc_multiq_qopt] { // TCA_KIND: nlattr_t[const[TCA_KIND, int16], // string["multiq"]] { // nla_len: offsetof = 0xb (2 bytes) // nla_type: const = 0x1 (2 bytes) // payload: buffer: {6d 75 6c 74 69 71 00} (length // 0x7) size: buffer: {} (length 0x0) pad = 0x0 (1 // bytes) // } // TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16], // tc_multiq_qopt] { // nla_len: offsetof = 0x8 (2 bytes) // nla_type: const = 0x2 (2 bytes) // payload: tc_multiq_qopt { // bands: int16 = 0x0 (2 bytes) // max_bands: int16 = 0x0 (2 bytes) // } // size: buffer: {} (length 0x0) // } // } // } // } // } // } // } // } // len: len = 0x38 (8 bytes) // } // } // vlen: const = 0x1 (8 bytes) // ctrl: const = 0x0 (8 bytes) // ctrllen: const = 0x0 (8 bytes) // f: send_flags = 0x0 (4 bytes) // pad = 0x0 (4 bytes) // } // } // f: send_flags = 0x0 (8 bytes) // ] *(uint64_t*)0x2000000012c0 = 0; *(uint32_t*)0x2000000012c8 = 0; *(uint64_t*)0x2000000012d0 = 0x200000000000; *(uint64_t*)0x200000000000 = 0x2000000005c0; *(uint32_t*)0x2000000005c0 = 0x38; *(uint16_t*)0x2000000005c4 = 0x24; *(uint16_t*)0x2000000005c6 = 0x6541; *(uint32_t*)0x2000000005c8 = 0x70bd2a; *(uint32_t*)0x2000000005cc = 0xfffffffd; *(uint8_t*)0x2000000005d0 = 0; *(uint8_t*)0x2000000005d1 = 0; *(uint16_t*)0x2000000005d2 = 0; *(uint32_t*)0x2000000005d4 = r[4]; *(uint16_t*)0x2000000005d8 = 0; *(uint16_t*)0x2000000005da = 1; *(uint16_t*)0x2000000005dc = -1; *(uint16_t*)0x2000000005de = -1; *(uint16_t*)0x2000000005e0 = 0xffe0; *(uint16_t*)0x2000000005e2 = 9; *(uint16_t*)0x2000000005e4 = 0xb; *(uint16_t*)0x2000000005e6 = 1; memcpy((void*)0x2000000005e8, "multiq\000", 7); *(uint16_t*)0x2000000005f0 = 8; *(uint16_t*)0x2000000005f2 = 2; *(uint16_t*)0x2000000005f4 = 0; *(uint16_t*)0x2000000005f6 = 0; *(uint64_t*)0x200000000008 = 0x38; *(uint64_t*)0x2000000012d8 = 1; *(uint64_t*)0x2000000012e0 = 0; *(uint64_t*)0x2000000012e8 = 0; *(uint32_t*)0x2000000012f0 = 0; syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x2000000012c0ul, /*f=*/0ul); // sendmsg$nl_route_sched arguments: [ // fd: sock_nl_route (resource) // msg: ptr[in, msghdr_netlink[netlink_msg_route_sched]] { // msghdr_netlink[netlink_msg_route_sched] { // addr: nil // addrlen: len = 0x0 (4 bytes) // pad = 0x0 (4 bytes) // vec: ptr[in, iovec[in, netlink_msg_route_sched]] { // iovec[in, netlink_msg_route_sched] { // addr: ptr[in, netlink_msg_route_sched] { // union netlink_msg_route_sched { // newtfilter: netlink_msg_t[const[RTM_NEWTFILTER, int16], // tcmsg[AF_UNSPEC], filter_policy] { // len: len = 0x54 (4 bytes) // type: const = 0x2c (2 bytes) // flags: netlink_msg_flags = 0xd3f (2 bytes) // seq: int32 = 0x30bd29 (4 bytes) // pid: int32 = 0x25dfdbfd (4 bytes) // payload: tcmsg[AF_UNSPEC] { // family: const = 0x0 (1 bytes) // tcm__pad1: const = 0x0 (1 bytes) // tcm__pad2: const = 0x0 (2 bytes) // ifindex: ifindex (resource) // tcm_handle: tcm_handle { // minor: tcm_handle_offsets = 0xffff (2 bytes) // major: tcm_handle_offsets = 0xf (2 bytes) // } // tcm_parent: tcm_handle { // minor: tcm_handle_offsets = 0x0 (2 bytes) // major: tcm_handle_offsets = 0x0 (2 bytes) // } // tcm_info: tcm_handle { // minor: tcm_handle_offsets = 0x7 (2 bytes) // major: tcm_handle_offsets = 0x300 (2 bytes) // } // } // attrs: array[filter_policy] { // union filter_policy { // filter_kind_options: union filter_kind_options { // f_basic: tca_kind_options_t["basic", // array[basic_policy]] { // TCA_KIND: nlattr_t[const[TCA_KIND, int16], // string["basic"]] { // nla_len: offsetof = 0xa (2 bytes) // nla_type: const = 0x1 (2 bytes) // payload: buffer: {62 61 73 69 63 00} (length // 0x6) size: buffer: {} (length 0x0) pad = 0x0 (2 // bytes) // } // TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16], // array[basic_policy]] { // nla_len: offsetof = 0x24 (2 bytes) // nla_type: const = 0x2 (2 bytes) // payload: array[basic_policy] { // union basic_policy { // TCA_BASIC_EMATCHES: // nlattr_tt[const[TCA_BASIC_EMATCHES, // int16:14], 0, 1, array[em_policy]] { // nla_len: offsetof = 0x20 (2 bytes) // nla_type: const = 0x2 (1 bytes) // NLA_F_NET_BYTEORDER: const = 0x0 (0 bytes) // NLA_F_NESTED: const = 0x1 (1 bytes) // payload: array[em_policy] { // union em_policy { // TCA_EMATCH_TREE_HDR: // nlattr_t[const[TCA_EMATCH_TREE_HDR, // int16], tcf_ematch_tree_hdr] { // nla_len: offsetof = 0x8 (2 bytes) // nla_type: const = 0x1 (2 bytes) // payload: tcf_ematch_tree_hdr { // nmatches: int16 = 0x1 (2 bytes) // progid: const = 0x0 (2 bytes) // } // size: buffer: {} (length 0x0) // } // } // union em_policy { // TCA_EMATCH_TREE_LIST: // nlattr_tt[const[TCA_EMATCH_TREE_LIST, // int16:14], 0, 1, // array[tca_ematch_tree_list]] { // nla_len: offsetof = 0x14 (2 bytes) // nla_type: const = 0x2 (1 bytes) // NLA_F_NET_BYTEORDER: const = 0x0 (0 // bytes) NLA_F_NESTED: const = 0x1 (1 // bytes) payload: // array[tca_ematch_tree_list] { // union tca_ematch_tree_list { // TCF_EM_NBYTE: // nlattr_tt[int16:14[1:3], 0, 0, // tcf_ematch_hdr_t[TCF_EM_NBYTE, // tcf_em_nbyte]] { // nla_len: offsetof = 0x10 (2 // bytes) nla_type: int16 = 0x1 // (1 bytes) NLA_F_NET_BYTEORDER: // const = 0x0 (0 bytes) // NLA_F_NESTED: const = 0x0 (1 // bytes) payload: // tcf_ematch_hdr_t[TCF_EM_NBYTE, // tcf_em_nbyte] { // header: // tcf_ematch_hdr[TCF_EM_NBYTE] // { // matchid: int16 = 0x18 (2 // bytes) kind: const = 0x2 // (2 bytes) flags: int16 = // 0x4 (2 bytes) pad: const = // 0x0 (2 bytes) // } // payload: tcf_em_nbyte { // off: int16 = 0x2 (2 bytes) // len: bytesize = 0x0 (1 // bytes) layer: tcf_layers = // 0x2 (1 bytes) payload: // buffer: {} (length 0x0) // } // } // size: buffer: {} (length 0x0) // } // } // } // size: buffer: {} (length 0x0) // } // } // } // size: buffer: {} (length 0x0) // } // } // } // size: buffer: {} (length 0x0) // } // } // } // } // } // } // } // } // len: len = 0x54 (8 bytes) // } // } // vlen: const = 0x1 (8 bytes) // ctrl: const = 0x0 (8 bytes) // ctrllen: const = 0x0 (8 bytes) // f: send_flags = 0x10 (4 bytes) // pad = 0x0 (4 bytes) // } // } // f: send_flags = 0x80 (8 bytes) // ] *(uint64_t*)0x2000000001c0 = 0; *(uint32_t*)0x2000000001c8 = 0; *(uint64_t*)0x2000000001d0 = 0x200000000300; *(uint64_t*)0x200000000300 = 0x200000000280; *(uint32_t*)0x200000000280 = 0x54; *(uint16_t*)0x200000000284 = 0x2c; *(uint16_t*)0x200000000286 = 0xd3f; *(uint32_t*)0x200000000288 = 0x30bd29; *(uint32_t*)0x20000000028c = 0x25dfdbfd; *(uint8_t*)0x200000000290 = 0; *(uint8_t*)0x200000000291 = 0; *(uint16_t*)0x200000000292 = 0; *(uint32_t*)0x200000000294 = r[4]; *(uint16_t*)0x200000000298 = -1; *(uint16_t*)0x20000000029a = 0xf; *(uint16_t*)0x20000000029c = 0; *(uint16_t*)0x20000000029e = 0; *(uint16_t*)0x2000000002a0 = 7; *(uint16_t*)0x2000000002a2 = 0x300; *(uint16_t*)0x2000000002a4 = 0xa; *(uint16_t*)0x2000000002a6 = 1; memcpy((void*)0x2000000002a8, "basic\000", 6); *(uint16_t*)0x2000000002b0 = 0x24; *(uint16_t*)0x2000000002b2 = 2; *(uint16_t*)0x2000000002b4 = 0x20; STORE_BY_BITMASK(uint16_t, , 0x2000000002b6, 2, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x2000000002b7, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x2000000002b7, 1, 7, 1); *(uint16_t*)0x2000000002b8 = 8; *(uint16_t*)0x2000000002ba = 1; *(uint16_t*)0x2000000002bc = 1; *(uint16_t*)0x2000000002be = 0; *(uint16_t*)0x2000000002c0 = 0x14; STORE_BY_BITMASK(uint16_t, , 0x2000000002c2, 2, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x2000000002c3, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x2000000002c3, 1, 7, 1); *(uint16_t*)0x2000000002c4 = 0x10; STORE_BY_BITMASK(uint16_t, , 0x2000000002c6, 1, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x2000000002c7, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x2000000002c7, 0, 7, 1); *(uint16_t*)0x2000000002c8 = 0x18; *(uint16_t*)0x2000000002ca = 2; *(uint16_t*)0x2000000002cc = 4; *(uint16_t*)0x2000000002ce = 0; *(uint16_t*)0x2000000002d0 = 2; STORE_BY_BITMASK(uint16_t, , 0x2000000002d2, 0, 0, 12); STORE_BY_BITMASK(uint8_t, , 0x2000000002d3, 2, 4, 4); *(uint64_t*)0x200000000308 = 0x54; *(uint64_t*)0x2000000001d8 = 1; *(uint64_t*)0x2000000001e0 = 0; *(uint64_t*)0x2000000001e8 = 0; *(uint32_t*)0x2000000001f0 = 0x10; syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x2000000001c0ul, /*f=MSG_EOR*/ 0x80ul); // socket$kcm arguments: [ // domain: const = 0x11 (8 bytes) // type: kcm_socket_type = 0x3 (8 bytes) // proto: const = 0x0 (4 bytes) // ] // returns sock_kcm res = syscall(__NR_socket, /*domain=*/0x11ul, /*type=SOCK_DGRAM|0x1*/ 3ul, /*proto=*/0); if (res != -1) r[5] = res; // openat$tun arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd) // } // flags: open_flags = 0x0 (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd_tun memcpy((void*)0x200000000400, "/dev/net/tun\000", 13); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000400ul, /*flags=*/0, /*mode=*/0); if (res != -1) r[6] = res; // close arguments: [ // fd: fd (resource) // ] syscall(__NR_close, /*fd=*/r[6]); // socket$nl_generic arguments: [ // domain: const = 0x10 (8 bytes) // type: const = 0x3 (8 bytes) // proto: const = 0x10 (4 bytes) // ] // returns sock_nl_generic syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10); // ioctl$SIOCSIFHWADDR arguments: [ // fd: fd_tun (resource) // cmd: const = 0x8914 (4 bytes) // arg: ptr[in, ifreq_dev_t[devnames, mac_addr]] { // ifreq_dev_t[devnames, mac_addr] { // ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00} // (length 0x10) elem: union mac_addr { // multicast: buffer: {bb bb bb bb bb bb} (length 0x6) // } // pad = 0x0 (18 bytes) // } // } // ] memcpy((void*)0x200000002280, "syzkaller0\000\000\000\000\000\000", 16); memset((void*)0x200000002290, 187, 6); syscall(__NR_ioctl, /*fd=*/r[6], /*cmd=*/0x8914, /*arg=*/0x200000002280ul); // ioctl$sock_SIOCGIFINDEX arguments: [ // fd: sock (resource) // cmd: const = 0x8933 (4 bytes) // arg: ptr[out, ifreq_dev_t[devnames, ifindex]] { // ifreq_dev_t[devnames, ifindex] { // ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00} // (length 0x10) elem: ifindex (resource) pad = 0x0 (20 bytes) // } // } // ] memcpy((void*)0x200000000100, "syzkaller0\000\000\000\000\000\000", 16); res = syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8933, /*arg=*/0x200000000100ul); if (res != -1) r[7] = *(uint32_t*)0x200000000110; // sendmsg$kcm arguments: [ // fd: sock_kcm (resource) // msg: ptr[in, send_msghdr] { // send_msghdr { // msg_name: ptr[in, sockaddr_storage] { // union sockaddr_storage { // xdp: sockaddr_xdp { // sxdp_family: const = 0x2c (2 bytes) // sxdp_flags: sxdp_flags = 0x7 (2 bytes) // sxdp_ifindex: ifindex (resource) // sxdp_queue_id: int32 = 0x3e (4 bytes) // sxdp_shared_umem_fd: const = 0x0 (4 bytes) // } // } // } // msg_namelen: len = 0x80 (4 bytes) // pad = 0x0 (4 bytes) // msg_iov: ptr[in, array[iovec[in, array[int8]]]] { // array[iovec[in, array[int8]]] { // iovec[in, array[int8]] { // addr: ptr[in, buffer] { // buffer: {27} (length 0x1) // } // len: len = 0x1 (8 bytes) // } // } // } // msg_iovlen: len = 0x1 (8 bytes) // msg_control: nil // msg_controllen: bytesize = 0x0 (8 bytes) // msg_flags: const = 0x0 (4 bytes) // pad = 0x0 (4 bytes) // } // } // f: send_flags = 0x4 (8 bytes) // ] *(uint64_t*)0x2000000000c0 = 0x200000000380; *(uint16_t*)0x200000000380 = 0x2c; *(uint16_t*)0x200000000382 = 7; *(uint32_t*)0x200000000384 = r[7]; *(uint32_t*)0x200000000388 = 0x3e; *(uint32_t*)0x20000000038c = 0; *(uint32_t*)0x2000000000c8 = 0x80; *(uint64_t*)0x2000000000d0 = 0x200000000080; *(uint64_t*)0x200000000080 = 0x200000000180; memset((void*)0x200000000180, 39, 1); *(uint64_t*)0x200000000088 = 1; *(uint64_t*)0x2000000000d8 = 1; *(uint64_t*)0x2000000000e0 = 0; *(uint64_t*)0x2000000000e8 = 0; *(uint32_t*)0x2000000000f0 = 0; syscall(__NR_sendmsg, /*fd=*/r[5], /*msg=*/0x2000000000c0ul, /*f=MSG_DONTROUTE*/ 4ul); return 0; }