// https://syzkaller.appspot.com/bug?id=252d57fb39d6c7c29c6166d2febd6a18ded17ef2 // 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[7] = {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 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[1] = res; // socket$unix arguments: [ // domain: const = 0x1 (8 bytes) // type: unix_socket_type = 0x5 (8 bytes) // proto: const = 0x0 (4 bytes) // ] // returns sock_unix res = syscall(__NR_socket, /*domain=*/1ul, /*type=SOCK_SEQPACKET*/ 5ul, /*proto=*/0); if (res != -1) r[2] = res; // ioctl$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[2], /*cmd=*/0x8933, /*arg=*/0x200000000100ul); if (res != -1) r[3] = *(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 = 0x78 (4 bytes) // type: const = 0x24 (2 bytes) // flags: netlink_msg_flags = 0x4ee4e6a52ff56541 (2 bytes) // seq: int32 = 0x70bd2a (4 bytes) // pid: int32 = 0xffffffff (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 = 0xfff1 (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 = 0x0 (2 bytes) // major: tcm_handle_offsets = 0xfff3 (2 bytes) // } // } // attrs: array[rtm_tca_policy] { // union rtm_tca_policy { // qdisc_kind_options: union qdisc_kind_options { // q_sfq: tca_kind_options_t["sfq", tc_sfq_qopt_v1] { // TCA_KIND: nlattr_t[const[TCA_KIND, int16], // string["sfq"]] { // nla_len: offsetof = 0x8 (2 bytes) // nla_type: const = 0x1 (2 bytes) // payload: buffer: {73 66 71 00} (length 0x4) // size: buffer: {} (length 0x0) // } // TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16], // tc_sfq_qopt_v1] { // nla_len: offsetof = 0xfffffffffffffdbc (2 bytes) // nla_type: const = 0x2 (2 bytes) // payload: tc_sfq_qopt_v1 { // v0: tc_sfq_qopt { // quantum: int32 = 0x1 (4 bytes) // perturb_period: int32 = 0xd (4 bytes) // limit: int32 = 0x0 (4 bytes) // divisor: int32 = 0x9 (4 bytes) // flows: int32 = 0x8 (4 bytes) // } // depth: int32 = 0x6 (4 bytes) // headdrop: int32 = 0x1 (4 bytes) // limit: int32 = 0x1 (4 bytes) // qth_min: int32 = 0x4 (4 bytes) // qth_max: int32 = 0x8 (4 bytes) // Wlog: int8 = 0xe (1 bytes) // Plog: int8 = 0x7 (1 bytes) // Scell_log: int8 = 0x1d (1 bytes) // flag: int8 = 0x3 (1 bytes) // max_P: int32 = 0x9 (4 bytes) // stats: tc_sfqred_stats { // prob_drop: int32 = 0xa2d6 (4 bytes) // forced_drop: int32 = 0x200 (4 bytes) // prob_mark: int32 = 0xb (4 bytes) // forced_mark: int32 = 0x40 (4 bytes) // prob_mark_head: int32 = 0x2 (4 bytes) // forced_mark_head: int32 = 0x1ff (4 bytes) // } // } // size: buffer: {} (length 0x0) // } // } // } // } // } // } // } // } // len: len = 0x78 (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 = 0x200000000080; *(uint64_t*)0x200000000080 = 0x200000000280; *(uint32_t*)0x200000000280 = 0x78; *(uint16_t*)0x200000000284 = 0x24; *(uint16_t*)0x200000000286 = 0x6541; *(uint32_t*)0x200000000288 = 0x70bd2a; *(uint32_t*)0x20000000028c = -1; *(uint8_t*)0x200000000290 = 0; *(uint8_t*)0x200000000291 = 0; *(uint16_t*)0x200000000292 = 0; *(uint32_t*)0x200000000294 = r[3]; *(uint16_t*)0x200000000298 = 0; *(uint16_t*)0x20000000029a = 0xfff1; *(uint16_t*)0x20000000029c = -1; *(uint16_t*)0x20000000029e = -1; *(uint16_t*)0x2000000002a0 = 0; *(uint16_t*)0x2000000002a2 = 0xfff3; *(uint16_t*)0x2000000002a4 = 8; *(uint16_t*)0x2000000002a6 = 1; memcpy((void*)0x2000000002a8, "sfq\000", 4); *(uint16_t*)0x2000000002ac = 0xfdbc; *(uint16_t*)0x2000000002ae = 2; *(uint32_t*)0x2000000002b0 = 1; *(uint32_t*)0x2000000002b4 = 0xd; *(uint32_t*)0x2000000002b8 = 0; *(uint32_t*)0x2000000002bc = 9; *(uint32_t*)0x2000000002c0 = 8; *(uint32_t*)0x2000000002c4 = 6; *(uint32_t*)0x2000000002c8 = 1; *(uint32_t*)0x2000000002cc = 1; *(uint32_t*)0x2000000002d0 = 4; *(uint32_t*)0x2000000002d4 = 8; *(uint8_t*)0x2000000002d8 = 0xe; *(uint8_t*)0x2000000002d9 = 7; *(uint8_t*)0x2000000002da = 0x1d; *(uint8_t*)0x2000000002db = 3; *(uint32_t*)0x2000000002dc = 9; *(uint32_t*)0x2000000002e0 = 0xa2d6; *(uint32_t*)0x2000000002e4 = 0x200; *(uint32_t*)0x2000000002e8 = 0xb; *(uint32_t*)0x2000000002ec = 0x40; *(uint32_t*)0x2000000002f0 = 2; *(uint32_t*)0x2000000002f4 = 0x1ff; *(uint64_t*)0x200000000088 = 0x78; *(uint64_t*)0x2000000012d8 = 1; *(uint64_t*)0x2000000012e0 = 0; *(uint64_t*)0x2000000012e8 = 0; *(uint32_t*)0x2000000012f0 = 0; syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x2000000012c0ul, /*f=*/0ul); // 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[4] = 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[5] = res; // ioctl$sock_SIOCGIFINDEX arguments: [ // fd: sock (resource) // cmd: const = 0x8933 (4 bytes) // arg: ptr[out, ifreq_dev_t[devnames, ifindex]] { // ifreq_dev_t[devnames, ifindex] { // ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00} // (length 0x10) elem: ifindex (resource) pad = 0x0 (20 bytes) // } // } // ] memcpy((void*)0x200000000100, "syzkaller0\000\000\000\000\000\000", 16); res = syscall(__NR_ioctl, /*fd=*/r[5], /*cmd=*/0x8933, /*arg=*/0x200000000100ul); if (res != -1) r[6] = *(uint32_t*)0x200000000110; // sendmsg$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 { // newtfilter: netlink_msg_t[const[RTM_NEWTFILTER, int16], // tcmsg[AF_UNSPEC], filter_policy] { // len: len = 0x84 (4 bytes) // type: const = 0x2c (2 bytes) // flags: netlink_msg_flags = 0xd27 (2 bytes) // seq: int32 = 0x30bd29 (4 bytes) // pid: int32 = 0x25dfdc00 (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 = 0x4 (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 = 0x8 (2 bytes) // major: tcm_handle_offsets = 0xf (2 bytes) // } // } // attrs: array[filter_policy] { // union filter_policy { // filter_kind_options: union filter_kind_options { // f_matchall: tca_kind_options_t["matchall", // array[mall_policy]] { // TCA_KIND: nlattr_t[const[TCA_KIND, int16], // string["matchall"]] { // nla_len: offsetof = 0xd (2 bytes) // nla_type: const = 0x1 (2 bytes) // payload: buffer: {6d 61 74 63 68 61 6c 6c 00} // (length 0x9) size: buffer: {} (length 0x0) pad = // 0x0 (3 bytes) // } // TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16], // array[mall_policy]] { // nla_len: offsetof = 0x50 (2 bytes) // nla_type: const = 0x2 (2 bytes) // payload: array[mall_policy] { // union mall_policy { // TCA_MATCHALL_ACT: // nlattr_t[const[TCA_MATCHALL_ACT, int16], // array[tca_actions]] { // nla_len: offsetof = 0x4c (2 bytes) // nla_type: const = 0x2 (2 bytes) // payload: array[tca_actions] { // union tca_actions { // m_gact: // nlattr_tt[int16:14[0:TCA_ACT_MAX_PRIO], // 0, 0, tcf_action_policy["gact", // gact_policy]] { // nla_len: offsetof = 0x48 (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_action_policy["gact", // gact_policy] { // TCA_ACT_KIND: // nlattr_t[const[TCA_ACT_KIND, // int16], string["gact"]] { // nla_len: offsetof = 0x9 (2 // bytes) nla_type: const = 0x1 (2 // bytes) payload: buffer: {67 61 // 63 74 00} (length 0x5) size: // buffer: {} (length 0x0) pad = // 0x0 (3 bytes) // } // TCA_ACT_OPTIONS: // nlattr_tt[const[TCA_ACT_OPTIONS, // int16:14], 0, 1, // array[gact_policy]] { // nla_len: offsetof = 0x1c (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[gact_policy] { // union gact_policy { // TCA_GACT_PARMS: // nlattr_t[const[TCA_GACT_PARMS, // int16], tc_gen] { // nla_len: offsetof = 0x18 // (2 bytes) nla_type: const // = 0x2 (2 bytes) payload: // tc_gen { // index: int32 = 0x6 (4 // bytes) capab: int32 = // 0x1000 (4 bytes) action: // tc_actions = 0x1 (4 // bytes) refcnt: int32 = // 0xfffffffc (4 bytes) // bindcnt: int32 = 0x8 (4 // bytes) // } // size: buffer: {} (length // 0x0) // } // } // } // size: buffer: {} (length 0x0) // } // TCA_ACT_COOKIE: // nlattr_t[const[TCA_ACT_COOKIE, // int16], array[int8]] { // nla_len: offsetof = 0x4 (2 // bytes) nla_type: const = 0x6 (2 // bytes) payload: buffer: {} // (length 0x0) size: buffer: {} // (length 0x0) // } // TCA_ACT_FLAGS: // nlattr_t[const[TCA_ACT_FLAGS, // int16], // nla_bitfield32[tcf_action_policy_flags]] // { // nla_len: offsetof = 0xc (2 // bytes) nla_type: const = 0x7 (2 // bytes) payload: // nla_bitfield32[tcf_action_policy_flags] // { // value: tcf_action_policy_flags // = 0x1 (4 bytes) selector: // tcf_action_policy_flags = 0x1 // (4 bytes) // } // size: buffer: {} (length 0x0) // } // TCA_ACT_HW_STATS: // nlattr_t[const[TCA_ACT_HW_STATS, // int16], // nla_bitfield32[tcf_action_policy_hw_stats]] // { // nla_len: offsetof = 0xc (2 // bytes) nla_type: const = 0x8 (2 // bytes) payload: // nla_bitfield32[tcf_action_policy_hw_stats] // { // value: // tcf_action_policy_hw_stats = // 0x3 (4 bytes) selector: // tcf_action_policy_hw_stats = // 0x3 (4 bytes) // } // size: buffer: {} (length 0x0) // } // } // size: buffer: {} (length 0x0) // } // } // } // size: buffer: {} (length 0x0) // } // } // } // size: buffer: {} (length 0x0) // } // } // } // } // } // } // } // } // len: len = 0x84 (8 bytes) // } // } // vlen: const = 0x1 (8 bytes) // ctrl: const = 0x0 (8 bytes) // ctrllen: const = 0x0 (8 bytes) // f: send_flags = 0x20000010 (4 bytes) // pad = 0x0 (4 bytes) // } // } // f: send_flags = 0x20000000 (8 bytes) // ] *(uint64_t*)0x200000000580 = 0; *(uint32_t*)0x200000000588 = 0; *(uint64_t*)0x200000000590 = 0x200000000300; *(uint64_t*)0x200000000300 = 0x200000000740; *(uint32_t*)0x200000000740 = 0x84; *(uint16_t*)0x200000000744 = 0x2c; *(uint16_t*)0x200000000746 = 0xd27; *(uint32_t*)0x200000000748 = 0x30bd29; *(uint32_t*)0x20000000074c = 0x25dfdc00; *(uint8_t*)0x200000000750 = 0; *(uint8_t*)0x200000000751 = 0; *(uint16_t*)0x200000000752 = 0; *(uint32_t*)0x200000000754 = r[6]; *(uint16_t*)0x200000000758 = 0; *(uint16_t*)0x20000000075a = 4; *(uint16_t*)0x20000000075c = 0; *(uint16_t*)0x20000000075e = 0; *(uint16_t*)0x200000000760 = 8; *(uint16_t*)0x200000000762 = 0xf; *(uint16_t*)0x200000000764 = 0xd; *(uint16_t*)0x200000000766 = 1; memcpy((void*)0x200000000768, "matchall\000", 9); *(uint16_t*)0x200000000774 = 0x50; *(uint16_t*)0x200000000776 = 2; *(uint16_t*)0x200000000778 = 0x4c; *(uint16_t*)0x20000000077a = 2; *(uint16_t*)0x20000000077c = 0x48; STORE_BY_BITMASK(uint16_t, , 0x20000000077e, 1, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x20000000077f, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x20000000077f, 0, 7, 1); *(uint16_t*)0x200000000780 = 9; *(uint16_t*)0x200000000782 = 1; memcpy((void*)0x200000000784, "gact\000", 5); *(uint16_t*)0x20000000078c = 0x1c; STORE_BY_BITMASK(uint16_t, , 0x20000000078e, 2, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x20000000078f, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x20000000078f, 1, 7, 1); *(uint16_t*)0x200000000790 = 0x18; *(uint16_t*)0x200000000792 = 2; *(uint32_t*)0x200000000794 = 6; *(uint32_t*)0x200000000798 = 0x1000; *(uint32_t*)0x20000000079c = 1; *(uint32_t*)0x2000000007a0 = 0xfffffffc; *(uint32_t*)0x2000000007a4 = 8; *(uint16_t*)0x2000000007a8 = 4; *(uint16_t*)0x2000000007aa = 6; *(uint16_t*)0x2000000007ac = 0xc; *(uint16_t*)0x2000000007ae = 7; *(uint32_t*)0x2000000007b0 = 1; *(uint32_t*)0x2000000007b4 = 1; *(uint16_t*)0x2000000007b8 = 0xc; *(uint16_t*)0x2000000007ba = 8; *(uint32_t*)0x2000000007bc = 3; *(uint32_t*)0x2000000007c0 = 3; *(uint64_t*)0x200000000308 = 0x84; *(uint64_t*)0x200000000598 = 1; *(uint64_t*)0x2000000005a0 = 0; *(uint64_t*)0x2000000005a8 = 0; *(uint32_t*)0x2000000005b0 = 0x20000010; syscall(__NR_sendmsg, /*fd=*/r[4], /*msg=*/0x200000000580ul, /*f=MSG_FASTOPEN*/ 0x20000000ul); return 0; }