// https://syzkaller.appspot.com/bug?id=00fadf9a6326e13098672b601d57f644cae380e9 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } struct nlmsg { char* pos; int nesting; struct nlattr* nested[8]; char buf[4096]; }; static void netlink_init(struct nlmsg* nlmsg, int typ, int flags, const void* data, int size) { memset(nlmsg, 0, sizeof(*nlmsg)); struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf; hdr->nlmsg_type = typ; hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; memcpy(hdr + 1, data, size); nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size); } static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data, int size) { struct nlattr* attr = (struct nlattr*)nlmsg->pos; attr->nla_len = sizeof(*attr) + size; attr->nla_type = typ; if (size > 0) memcpy(attr + 1, data, size); nlmsg->pos += NLMSG_ALIGN(attr->nla_len); } static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type, int* reply_len, bool dofail) { if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting) exit(1); struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf; hdr->nlmsg_len = nlmsg->pos - nlmsg->buf; struct sockaddr_nl addr; memset(&addr, 0, sizeof(addr)); addr.nl_family = AF_NETLINK; ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr)); if (n != (ssize_t)hdr->nlmsg_len) { if (dofail) exit(1); return -1; } n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); if (reply_len) *reply_len = 0; if (n < 0) { if (dofail) exit(1); return -1; } if (n < (ssize_t)sizeof(struct nlmsghdr)) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type == NLMSG_DONE) return 0; if (reply_len && hdr->nlmsg_type == reply_type) { *reply_len = n; return 0; } if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type != NLMSG_ERROR) { errno = EINVAL; if (dofail) exit(1); return -1; } errno = -((struct nlmsgerr*)(hdr + 1))->error; return -errno; } static int netlink_query_family_id(struct nlmsg* nlmsg, int sock, const char* family_name, bool dofail) { struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = CTRL_CMD_GETFAMILY; netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name, strnlen(family_name, GENL_NAMSIZ - 1) + 1); int n = 0; int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail); if (err < 0) { return -1; } uint16_t id = 0; struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN + NLMSG_ALIGN(sizeof(genlhdr))); for (; (char*)attr < nlmsg->buf + n; attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) { if (attr->nla_type == CTRL_ATTR_FAMILY_ID) { id = *(uint16_t*)(attr + 1); break; } } if (!id) { errno = EINVAL; return -1; } recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); return id; } const int kInitNetNsFd = 201; static long syz_init_net_socket(volatile long domain, volatile long type, volatile long proto) { return syscall(__NR_socket, domain, type, proto); } static long syz_genetlink_get_family_id(volatile long name, volatile long sock_arg) { bool dofail = false; int fd = sock_arg; if (fd < 0) { dofail = true; fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (fd == -1) { return -1; } } struct nlmsg nlmsg_tmp; int ret = netlink_query_family_id(&nlmsg_tmp, fd, (char*)name, dofail); if ((int)sock_arg < 0) close(fd); if (ret < 0) { return -1; } return ret; } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); for (int i = 0; i < 100; i++) { if (waitpid(-1, status, WNOHANG | __WALL) == pid) return; usleep(1000); } DIR* dir = opendir("/sys/fs/fuse/connections"); if (dir) { for (;;) { struct dirent* ent = readdir(dir); if (!ent) break; if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) continue; char abort[300]; snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name); int fd = open(abort, O_WRONLY); if (fd == -1) { continue; } if (write(fd, abort, 1) < 0) { } close(fd); } closedir(dir); } else { } while (waitpid(-1, status, __WALL) != pid) { } } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); write_file("/proc/self/oom_score_adj", "1000"); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { setup_test(); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; res = syscall(__NR_socket, 2ul, 2ul, 0); if (res != -1) r[0] = res; memcpy((void*)0x20000040, "filter\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000", 32); *(uint32_t*)0x20000060 = 0xe; *(uint32_t*)0x20000064 = 4; *(uint32_t*)0x20000068 = 0x2a8; *(uint32_t*)0x2000006c = -1; *(uint32_t*)0x20000070 = 0; *(uint32_t*)0x20000074 = 0x98; *(uint32_t*)0x20000078 = 0x98; *(uint32_t*)0x2000007c = -1; *(uint32_t*)0x20000080 = -1; *(uint32_t*)0x20000084 = 0x210; *(uint32_t*)0x20000088 = 0x210; *(uint32_t*)0x2000008c = 0x210; *(uint32_t*)0x20000090 = -1; *(uint32_t*)0x20000094 = 4; *(uint64_t*)0x20000098 = 0; *(uint32_t*)0x200000a0 = htobe32(-1); *(uint32_t*)0x200000a4 = htobe32(-1); *(uint32_t*)0x200000a8 = htobe32(0); *(uint32_t*)0x200000ac = htobe32(0); memcpy((void*)0x200000b0, "hsr0\000\000\000\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x200000c0, "veth1_to_bridge\000", 16); *(uint8_t*)0x200000d0 = 0; *(uint8_t*)0x200000e0 = 0; *(uint16_t*)0x200000f0 = 0; *(uint8_t*)0x200000f2 = 0; *(uint8_t*)0x200000f3 = 0; *(uint32_t*)0x200000f4 = 0; *(uint16_t*)0x200000f8 = 0x70; *(uint16_t*)0x200000fa = 0x98; *(uint32_t*)0x200000fc = 0; *(uint64_t*)0x20000100 = 0; *(uint64_t*)0x20000108 = 0; *(uint16_t*)0x20000110 = 0x28; memcpy((void*)0x20000112, "REJECT\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000", 29); *(uint8_t*)0x2000012f = 0; *(uint32_t*)0x20000130 = 0; *(uint32_t*)0x20000138 = htobe32(0); *(uint32_t*)0x2000013c = htobe32(0); *(uint32_t*)0x20000140 = htobe32(0); *(uint32_t*)0x20000144 = htobe32(0); memcpy((void*)0x20000148, "wlan0\000\000\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000158, "batadv0\000\000\000\000\000\000\000\000\000", 16); *(uint8_t*)0x20000168 = 0; *(uint8_t*)0x20000178 = 0; *(uint16_t*)0x20000188 = 6; *(uint8_t*)0x2000018a = 0; *(uint8_t*)0x2000018b = 0; *(uint32_t*)0x2000018c = 0; *(uint16_t*)0x20000190 = 0x98; *(uint16_t*)0x20000192 = 0xc0; *(uint32_t*)0x20000194 = 0; *(uint64_t*)0x20000198 = 0; *(uint64_t*)0x200001a0 = 0; *(uint16_t*)0x200001a8 = 0x28; memcpy((void*)0x200001aa, "tcpmss\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000", 29); *(uint8_t*)0x200001c7 = 0; *(uint16_t*)0x200001c8 = 0; *(uint16_t*)0x200001ca = 0; *(uint8_t*)0x200001cc = 0; *(uint16_t*)0x200001d0 = 0x28; memcpy((void*)0x200001d2, "REJECT\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000", 29); *(uint8_t*)0x200001ef = 0; *(uint32_t*)0x200001f0 = 0; *(uint32_t*)0x200001f8 = htobe32(0xe0000001); *(uint32_t*)0x200001fc = htobe32(0); *(uint32_t*)0x20000200 = htobe32(0); *(uint32_t*)0x20000204 = htobe32(0); memcpy((void*)0x20000208, "netpci0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000218, "rose0\000\000\000\000\000\000\000\000\000\000\000", 16); *(uint8_t*)0x20000228 = 0; *(uint8_t*)0x20000238 = 0; *(uint16_t*)0x20000248 = 0; *(uint8_t*)0x2000024a = 0; *(uint8_t*)0x2000024b = 0; *(uint32_t*)0x2000024c = 0; *(uint16_t*)0x20000250 = 0x70; *(uint16_t*)0x20000252 = 0xb8; *(uint32_t*)0x20000254 = 0; *(uint64_t*)0x20000258 = 0; *(uint64_t*)0x20000260 = 0; *(uint16_t*)0x20000268 = 0x48; memcpy((void*)0x2000026a, "TEE\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000", 29); *(uint8_t*)0x20000287 = 1; *(uint32_t*)0x20000288 = htobe32(0xe0000001); memcpy((void*)0x20000298, "ip6gretap0\000\000\000\000\000\000", 16); *(uint64_t*)0x200002a8 = 0; memset((void*)0x200002b0, 0, 84); *(uint32_t*)0x20000304 = 0; *(uint16_t*)0x20000308 = 0x70; *(uint16_t*)0x2000030a = 0x98; *(uint32_t*)0x2000030c = 0; *(uint64_t*)0x20000310 = 0; *(uint64_t*)0x20000318 = 0; *(uint16_t*)0x20000320 = 0x28; memset((void*)0x20000322, 0, 29); *(uint8_t*)0x2000033f = 0; *(uint32_t*)0x20000340 = 0xfffffffe; syscall(__NR_setsockopt, r[0], 0, 0x40, 0x20000040ul, 0x308ul); res = -1; res = syz_init_net_socket(0x10, 3, 0x10); if (res != -1) r[1] = res; res = -1; res = syz_init_net_socket(0x10, 3, 0x10); if (res != -1) r[2] = res; memcpy((void*)0x200000c0, "802.15.4 MAC\000", 13); res = -1; res = syz_genetlink_get_family_id(0x200000c0, r[2]); if (res != -1) r[3] = res; *(uint64_t*)0x200003c0 = 0; *(uint32_t*)0x200003c8 = 0; *(uint64_t*)0x200003d0 = 0x20000380; *(uint64_t*)0x20000380 = 0x20000340; *(uint32_t*)0x20000340 = 0x20; *(uint16_t*)0x20000344 = r[3]; *(uint16_t*)0x20000346 = 1; *(uint32_t*)0x20000348 = 0; *(uint32_t*)0x2000034c = 0; *(uint8_t*)0x20000350 = 0x22; *(uint8_t*)0x20000351 = 0; *(uint16_t*)0x20000352 = 0; *(uint16_t*)0x20000354 = 0xa; *(uint16_t*)0x20000356 = 1; memcpy((void*)0x20000358, "wpan1\000", 6); *(uint64_t*)0x20000388 = 0x20; *(uint64_t*)0x200003d8 = 1; *(uint64_t*)0x200003e0 = 0; *(uint64_t*)0x200003e8 = 0; *(uint32_t*)0x200003f0 = 0; syscall(__NR_sendmsg, r[1], 0x200003c0ul, 0ul); res = syscall(__NR_socket, 0x10ul, 3ul, 0xc); if (res != -1) r[4] = res; *(uint64_t*)0x20000200 = 0; *(uint32_t*)0x20000208 = 0; *(uint64_t*)0x20000210 = 0x200001c0; *(uint64_t*)0x200001c0 = 0x20000140; memcpy((void*)0x20000140, "\x57\x00\x00\x00\x00\x0b\x01\x02\x00\x00\x00\x00\x00\x00\x00\x00\x0a" "\x00\x00\x07\x08\x00\x01\x00\x2c\x2d\x27\x00\x05\x00\x01\x00\x00\x00" "\x00\x00\x08\x00\x03\x40\x00\x00\x00\x00\x08\x00\x02\x40\x00\x00\x00" "\x05\x0b\x00\x01\x00\x3a\x50\x26\x26\x2e\x23\x00\x00\x08\x00\x02\x40" "\x00\x00\x00\x05\x07\x00\x01\x00\x5c\x2d\x00\x00\x08\x00\x02\x40\x00" "\x00\x00\x05\x06\x00\x01", 91); *(uint64_t*)0x200001c8 = 0x68; *(uint64_t*)0x20000218 = 1; *(uint64_t*)0x20000220 = 0; *(uint64_t*)0x20000228 = 0; *(uint32_t*)0x20000230 = 0; syscall(__NR_sendmsg, r[4], 0x20000200ul, 0ul); } int main(void) { syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); loop(); return 0; }