| // WARNING: ODEBUG bug in rt6_release |
| // https://syzkaller.appspot.com/bug?id=53b9ac095099f2e4bb92d05a1fc63ca93a9910fa |
| // status:open |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <arpa/inet.h> |
| #include <dirent.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <net/if.h> |
| #include <netinet/in.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/prctl.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <linux/genetlink.h> |
| #include <linux/if_addr.h> |
| #include <linux/if_link.h> |
| #include <linux/in6.h> |
| #include <linux/neighbour.h> |
| #include <linux/net.h> |
| #include <linux/netlink.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/veth.h> |
| |
| unsigned long long procid; |
| |
| 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; |
| } |
| |
| static struct { |
| char* pos; |
| int nesting; |
| struct nlattr* nested[8]; |
| char buf[1024]; |
| } nlmsg; |
| |
| static void netlink_init(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(int typ, const void* data, int size) |
| { |
| struct nlattr* attr = (struct nlattr*)nlmsg.pos; |
| attr->nla_len = sizeof(*attr) + size; |
| attr->nla_type = typ; |
| memcpy(attr + 1, data, size); |
| nlmsg.pos += NLMSG_ALIGN(attr->nla_len); |
| } |
| |
| static int netlink_send_ext(int sock, uint16_t reply_type, int* reply_len) |
| { |
| 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; |
| unsigned n = sendto(sock, nlmsg.buf, hdr->nlmsg_len, 0, |
| (struct sockaddr*)&addr, sizeof(addr)); |
| if (n != hdr->nlmsg_len) |
| exit(1); |
| n = recv(sock, nlmsg.buf, sizeof(nlmsg.buf), 0); |
| if (n < sizeof(struct nlmsghdr)) |
| exit(1); |
| if (reply_len && hdr->nlmsg_type == reply_type) { |
| *reply_len = n; |
| return 0; |
| } |
| if (n < sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr)) |
| exit(1); |
| if (hdr->nlmsg_type != NLMSG_ERROR) |
| exit(1); |
| return -((struct nlmsgerr*)(hdr + 1))->error; |
| } |
| |
| static int netlink_send(int sock) |
| { |
| return netlink_send_ext(sock, 0, NULL); |
| } |
| |
| const int kInitNetNsFd = 239; |
| |
| #define DEVLINK_FAMILY_NAME "devlink" |
| |
| #define DEVLINK_CMD_RELOAD 37 |
| #define DEVLINK_ATTR_BUS_NAME 1 |
| #define DEVLINK_ATTR_DEV_NAME 2 |
| #define DEVLINK_ATTR_NETNS_FD 137 |
| |
| static void netlink_devlink_netns_move(const char* bus_name, |
| const char* dev_name, int netns_fd) |
| { |
| struct genlmsghdr genlhdr; |
| struct nlattr* attr; |
| int sock, err, n; |
| uint16_t id = 0; |
| sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); |
| if (sock == -1) |
| exit(1); |
| memset(&genlhdr, 0, sizeof(genlhdr)); |
| genlhdr.cmd = CTRL_CMD_GETFAMILY; |
| netlink_init(GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr)); |
| netlink_attr(CTRL_ATTR_FAMILY_NAME, DEVLINK_FAMILY_NAME, |
| strlen(DEVLINK_FAMILY_NAME) + 1); |
| err = netlink_send_ext(sock, GENL_ID_CTRL, &n); |
| if (err) { |
| goto error; |
| } |
| 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) { |
| goto error; |
| } |
| recv(sock, nlmsg.buf, sizeof(nlmsg.buf), 0); /* recv ack */ |
| memset(&genlhdr, 0, sizeof(genlhdr)); |
| genlhdr.cmd = DEVLINK_CMD_RELOAD; |
| netlink_init(id, 0, &genlhdr, sizeof(genlhdr)); |
| netlink_attr(DEVLINK_ATTR_BUS_NAME, bus_name, strlen(bus_name) + 1); |
| netlink_attr(DEVLINK_ATTR_DEV_NAME, dev_name, strlen(dev_name) + 1); |
| netlink_attr(DEVLINK_ATTR_NETNS_FD, &netns_fd, sizeof(netns_fd)); |
| netlink_send(sock); |
| error: |
| close(sock); |
| } |
| |
| static void initialize_devlink_pci(void) |
| { |
| int netns = open("/proc/self/ns/net", O_RDONLY); |
| if (netns == -1) |
| exit(1); |
| int ret = setns(kInitNetNsFd, 0); |
| if (ret == -1) |
| exit(1); |
| netlink_devlink_netns_move("pci", "0000:00:10.0", netns); |
| ret = setns(netns, 0); |
| if (ret == -1) |
| exit(1); |
| close(netns); |
| } |
| |
| static void kill_and_wait(int pid, int* status) |
| { |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| int i; |
| for (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; |
| for (iter = 0;; 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 < 5 * 1000) |
| continue; |
| kill_and_wait(pid, &status); |
| break; |
| } |
| } |
| } |
| |
| uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, |
| 0xffffffffffffffff, 0xffffffffffffffff}; |
| |
| void execute_one(void) |
| { |
| intptr_t res = 0; |
| res = syscall(__NR_socket, 0x10ul, 3ul, 0ul); |
| if (res != -1) |
| r[0] = res; |
| *(uint64_t*)0x200001c0 = 0x20000040; |
| memcpy((void*)0x20000040, "\x39\x00\x00\x00\x13\x00\x03\x47\x00\xbb\x65\xe1" |
| "\xc3\xe4\xff\xff\x06\x00\x00\x00\x01\x00\x00\x00" |
| "\x45\x00\x00\x00\x25\x00\x00\x00\x19\x00\x04\x00" |
| "\x04\x00\x00\x00\x07\xfd\x17\xe5\xff\xff\x06\x06" |
| "\x04\x00\x00\x00\x00\x00\x00\x00\x00", |
| 57); |
| *(uint64_t*)0x200001c8 = 0x39; |
| syscall(__NR_writev, r[0], 0x200001c0ul, 1ul); |
| res = syscall(__NR_socket, 0x10ul, 3ul, 0ul); |
| if (res != -1) |
| r[1] = res; |
| res = syscall(__NR_socket, 0x10ul, 3ul, 0ul); |
| if (res != -1) |
| r[2] = res; |
| res = syscall(__NR_socket, 0x10ul, 0x803ul, 0); |
| if (res != -1) |
| r[3] = res; |
| *(uint64_t*)0x200001c0 = 0; |
| *(uint32_t*)0x200001c8 = 0; |
| *(uint64_t*)0x200001d0 = 0x20000180; |
| *(uint64_t*)0x20000180 = 0; |
| *(uint64_t*)0x20000188 = 0; |
| *(uint64_t*)0x200001d8 = 1; |
| *(uint64_t*)0x200001e0 = 0; |
| *(uint64_t*)0x200001e8 = 0; |
| *(uint32_t*)0x200001f0 = 0; |
| syscall(__NR_sendmsg, r[3], 0x200001c0ul, 0ul); |
| *(uint32_t*)0x20000200 = 0x14; |
| res = syscall(__NR_getsockname, r[3], 0x20000100ul, 0x20000200ul); |
| if (res != -1) |
| r[4] = *(uint32_t*)0x20000104; |
| *(uint64_t*)0x20000040 = 0; |
| *(uint32_t*)0x20000048 = 0; |
| *(uint64_t*)0x20000050 = 0x20000240; |
| *(uint64_t*)0x20000240 = 0x20000340; |
| *(uint32_t*)0x20000340 = 0x38; |
| *(uint16_t*)0x20000344 = 0x10; |
| *(uint16_t*)0x20000346 = 0x705; |
| *(uint32_t*)0x20000348 = 0; |
| *(uint32_t*)0x2000034c = 0; |
| *(uint8_t*)0x20000350 = 0; |
| *(uint8_t*)0x20000351 = 0; |
| *(uint16_t*)0x20000352 = 0; |
| *(uint32_t*)0x20000354 = r[4]; |
| *(uint32_t*)0x20000358 = 0; |
| *(uint32_t*)0x2000035c = 0; |
| *(uint16_t*)0x20000360 = 0x18; |
| *(uint16_t*)0x20000362 = 0x12; |
| *(uint16_t*)0x20000364 = 8; |
| *(uint16_t*)0x20000366 = 1; |
| memcpy((void*)0x20000368, "vti\000", 4); |
| *(uint16_t*)0x2000036c = 0xc; |
| *(uint16_t*)0x2000036e = 2; |
| *(uint16_t*)0x20000370 = 8; |
| *(uint16_t*)0x20000372 = 1; |
| *(uint32_t*)0x20000374 = r[4]; |
| *(uint64_t*)0x20000248 = 0x38; |
| *(uint64_t*)0x20000058 = 1; |
| *(uint64_t*)0x20000060 = 0; |
| *(uint64_t*)0x20000068 = 0; |
| *(uint32_t*)0x20000070 = 0; |
| syscall(__NR_sendmsg, r[2], 0x20000040ul, 0ul); |
| *(uint64_t*)0x200000c0 = 0; |
| *(uint32_t*)0x200000c8 = 0; |
| *(uint64_t*)0x200000d0 = 0x20000000; |
| *(uint64_t*)0x20000000 = 0x20001980; |
| memcpy((void*)0x20001980, "\x2c\x00\x00\x00\x14\x00\x01\x00\x00\x00\x00\x00" |
| "\x00\x00\x00\x00\x0a\x00\x02\x00", |
| 20); |
| *(uint32_t*)0x20001994 = r[4]; |
| memcpy((void*)0x20001998, "\x14\x00\x02\x00\xc6\xe3\x94\x78\xde\x96\x9f\xf8" |
| "\x22\x2a\x75\x7a\x4a\xe2\x76\xc3\x1e\xf6\xd2\x32" |
| "\x4b\x9a", |
| 26); |
| *(uint64_t*)0x20000008 = 0x2c; |
| *(uint64_t*)0x200000d8 = 1; |
| *(uint64_t*)0x200000e0 = 0; |
| *(uint64_t*)0x200000e8 = 0; |
| *(uint32_t*)0x200000f0 = 0; |
| syscall(__NR_sendmsg, r[1], 0x200000c0ul, 0ul); |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0); |
| for (procid = 0; procid < 6; procid++) { |
| if (fork() == 0) { |
| loop(); |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |