| // WARNING in ip6_sk_dst_lookup_flow |
| // https://syzkaller.appspot.com/bug?id=acbf2e6edaa0407ab863b0a3ea249c4d93a7348b |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <arpa/inet.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <errno.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <linux/futex.h> |
| #include <linux/if.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_tun.h> |
| #include <linux/ip.h> |
| #include <linux/tcp.h> |
| #include <net/if_arp.h> |
| #include <pthread.h> |
| #include <sched.h> |
| #include <signal.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdarg.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stdlib.h> |
| #include <sys/ioctl.h> |
| #include <sys/prctl.h> |
| #include <sys/prctl.h> |
| #include <sys/resource.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/time.h> |
| #include <sys/uio.h> |
| #include <sys/wait.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| const int kFailStatus = 67; |
| const int kRetryStatus = 69; |
| |
| static void fail(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); |
| } |
| |
| static uint64_t current_time_ms() |
| { |
| struct timespec ts; |
| |
| if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
| fail("clock_gettime failed"); |
| return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; |
| } |
| |
| static void vsnprintf_check(char* str, size_t size, const char* format, |
| va_list args) |
| { |
| int rv; |
| |
| rv = vsnprintf(str, size, format, args); |
| if (rv < 0) |
| fail("tun: snprintf failed"); |
| if ((size_t)rv >= size) |
| fail("tun: string '%s...' doesn't fit into buffer", str); |
| } |
| |
| #define COMMAND_MAX_LEN 128 |
| #define PATH_PREFIX \ |
| "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin " |
| #define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1) |
| |
| static void execute_command(bool panic, const char* format, ...) |
| { |
| va_list args; |
| char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN]; |
| int rv; |
| |
| va_start(args, format); |
| memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN); |
| vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args); |
| va_end(args); |
| rv = system(command); |
| if (rv) { |
| if (panic) |
| fail("command '%s' failed: %d", &command[0], rv); |
| } |
| } |
| |
| #define DEV_IPV4 "172.20.20.%d" |
| #define DEV_IPV6 "fe80::%02hx" |
| #define DEV_MAC "aa:aa:aa:aa:aa:%02hx" |
| |
| static void snprintf_check(char* str, size_t size, const char* format, ...) |
| { |
| va_list args; |
| |
| va_start(args, format); |
| vsnprintf_check(str, size, format, args); |
| va_end(args); |
| } |
| |
| static void initialize_netdevices(void) |
| { |
| unsigned i; |
| const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "team"}; |
| const char* devnames[] = {"lo", |
| "sit0", |
| "bridge0", |
| "vcan0", |
| "tunl0", |
| "gre0", |
| "gretap0", |
| "ip_vti0", |
| "ip6_vti0", |
| "ip6tnl0", |
| "ip6gre0", |
| "ip6gretap0", |
| "erspan0", |
| "bond0", |
| "veth0", |
| "veth1", |
| "team0", |
| "veth0_to_bridge", |
| "veth1_to_bridge", |
| "veth0_to_bond", |
| "veth1_to_bond", |
| "veth0_to_team", |
| "veth1_to_team"}; |
| const char* devmasters[] = {"bridge", "bond", "team"}; |
| |
| for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++) |
| execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]); |
| execute_command(0, "ip link add type veth"); |
| |
| for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) { |
| execute_command( |
| 0, "ip link add name %s_slave_0 type veth peer name veth0_to_%s", |
| devmasters[i], devmasters[i]); |
| execute_command( |
| 0, "ip link add name %s_slave_1 type veth peer name veth1_to_%s", |
| devmasters[i], devmasters[i]); |
| execute_command(0, "ip link set %s_slave_0 master %s0", devmasters[i], |
| devmasters[i]); |
| execute_command(0, "ip link set %s_slave_1 master %s0", devmasters[i], |
| devmasters[i]); |
| execute_command(0, "ip link set veth0_to_%s up", devmasters[i]); |
| execute_command(0, "ip link set veth1_to_%s up", devmasters[i]); |
| } |
| execute_command(0, "ip link set bridge_slave_0 up"); |
| execute_command(0, "ip link set bridge_slave_1 up"); |
| |
| for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) { |
| char addr[32]; |
| snprintf_check(addr, sizeof(addr), DEV_IPV4, i + 10); |
| execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]); |
| snprintf_check(addr, sizeof(addr), DEV_IPV6, i + 10); |
| execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]); |
| snprintf_check(addr, sizeof(addr), DEV_MAC, i + 10); |
| execute_command(0, "ip link set dev %s address %s", devnames[i], addr); |
| execute_command(0, "ip link set dev %s up", devnames[i]); |
| } |
| } |
| |
| static void loop(); |
| |
| static void sandbox_common() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| setsid(); |
| |
| struct rlimit rlim; |
| rlim.rlim_cur = rlim.rlim_max = 160 << 20; |
| setrlimit(RLIMIT_AS, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 8 << 20; |
| setrlimit(RLIMIT_MEMLOCK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 136 << 20; |
| setrlimit(RLIMIT_FSIZE, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 1 << 20; |
| setrlimit(RLIMIT_STACK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 0; |
| setrlimit(RLIMIT_CORE, &rlim); |
| |
| if (unshare(CLONE_NEWNS)) { |
| } |
| if (unshare(CLONE_NEWIPC)) { |
| } |
| if (unshare(0x02000000)) { |
| } |
| if (unshare(CLONE_NEWUTS)) { |
| } |
| if (unshare(CLONE_SYSVSEM)) { |
| } |
| } |
| |
| int wait_for_loop(int pid) |
| { |
| if (pid < 0) |
| fail("sandbox fork failed"); |
| int status = 0; |
| while (waitpid(-1, &status, __WALL) != pid) { |
| } |
| return WEXITSTATUS(status); |
| } |
| |
| static int do_sandbox_none(void) |
| { |
| if (unshare(CLONE_NEWPID)) { |
| } |
| int pid = fork(); |
| if (pid != 0) |
| return wait_for_loop(pid); |
| |
| sandbox_common(); |
| if (unshare(CLONE_NEWNET)) { |
| } |
| initialize_netdevices(); |
| loop(); |
| doexit(1); |
| } |
| |
| static void execute_one(); |
| extern unsigned long long procid; |
| |
| static void loop() |
| { |
| int iter; |
| for (iter = 0;; iter++) { |
| int pid = fork(); |
| if (pid < 0) |
| fail("clone failed"); |
| if (pid == 0) { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| execute_one(); |
| int fd; |
| for (fd = 3; fd < 30; fd++) |
| close(fd); |
| doexit(0); |
| } |
| |
| int status = 0; |
| uint64_t start = current_time_ms(); |
| for (;;) { |
| int res = waitpid(-1, &status, __WALL | WNOHANG); |
| if (res == pid) { |
| break; |
| } |
| usleep(1000); |
| if (current_time_ms() - start < 5 * 1000) |
| continue; |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| while (waitpid(-1, &status, __WALL) != pid) { |
| } |
| break; |
| } |
| } |
| } |
| |
| struct thread_t { |
| int created, running, call; |
| pthread_t th; |
| }; |
| |
| static struct thread_t threads[16]; |
| static void execute_call(int call); |
| static int running; |
| |
| static void* thr(void* arg) |
| { |
| struct thread_t* th = (struct thread_t*)arg; |
| for (;;) { |
| while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) |
| syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0); |
| execute_call(th->call); |
| __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); |
| __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &th->running, FUTEX_WAKE); |
| } |
| return 0; |
| } |
| |
| static void execute(int num_calls) |
| { |
| int call, thread; |
| running = 0; |
| for (call = 0; call < num_calls; call++) { |
| for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) { |
| struct thread_t* th = &threads[thread]; |
| if (!th->created) { |
| th->created = 1; |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setstacksize(&attr, 128 << 10); |
| pthread_create(&th->th, &attr, thr, th); |
| } |
| if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) { |
| th->call = call; |
| __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); |
| __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &th->running, FUTEX_WAKE); |
| struct timespec ts; |
| ts.tv_sec = 0; |
| ts.tv_nsec = 20 * 1000 * 1000; |
| syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts); |
| if (__atomic_load_n(&running, __ATOMIC_RELAXED)) |
| usleep((call == num_calls - 1) ? 10000 : 1000); |
| break; |
| } |
| } |
| } |
| } |
| |
| uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| res = syscall(__NR_socket, 0xa, 2, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| *(uint16_t*)0x20000080 = 0xa; |
| *(uint16_t*)0x20000082 = htobe16(0); |
| *(uint32_t*)0x20000084 = 0; |
| *(uint8_t*)0x20000088 = 0xfe; |
| *(uint8_t*)0x20000089 = 0x80; |
| *(uint8_t*)0x2000008a = 0; |
| *(uint8_t*)0x2000008b = 0; |
| *(uint8_t*)0x2000008c = 0; |
| *(uint8_t*)0x2000008d = 0; |
| *(uint8_t*)0x2000008e = 0; |
| *(uint8_t*)0x2000008f = 0; |
| *(uint8_t*)0x20000090 = 0; |
| *(uint8_t*)0x20000091 = 0; |
| *(uint8_t*)0x20000092 = 0; |
| *(uint8_t*)0x20000093 = 0; |
| *(uint8_t*)0x20000094 = 0; |
| *(uint8_t*)0x20000095 = 0; |
| *(uint8_t*)0x20000096 = 0; |
| *(uint8_t*)0x20000097 = 0xbb; |
| *(uint32_t*)0x20000098 = 0xb; |
| syscall(__NR_connect, r[0], 0x20000080, 0x1c); |
| break; |
| case 2: |
| *(uint16_t*)0x200000c0 = 0x27; |
| *(uint32_t*)0x200000c4 = 0; |
| *(uint32_t*)0x200000c8 = 0; |
| *(uint32_t*)0x200000cc = 5; |
| *(uint8_t*)0x200000d0 = 0x51; |
| *(uint8_t*)0x200000d1 = 1; |
| memcpy((void*)0x200000d2, |
| "\xfc\xc6\x13\xf7\xf6\xca\x68\x50\x77\xa4\xd8\xb9\x15\xb8\xee\xe6" |
| "\x43\x48\xa6\xc7\xef\x28\xc8\x45\x06\xff\x2c\xed\x97\xa6\x75\xc6" |
| "\x16\x47\x1c\xbc\x55\xd6\x18\x58\x4e\x73\x6d\xc9\xf3\x77\x87\x43" |
| "\x81\x91\xc0\x05\xbc\xf7\xeb\x05\xea\x5c\x79\x25\x12\xc5\x9a", |
| 63); |
| *(uint64_t*)0x20000118 = 0xb; |
| syscall(__NR_recvfrom, r[0], 0x20000000, 0x36, 0x40000000, 0x200000c0, |
| 0x80); |
| break; |
| case 3: |
| res = syscall(__NR_socket, 0x18, 1, 1); |
| if (res != -1) |
| r[1] = res; |
| break; |
| case 4: |
| *(uint16_t*)0x205fafd2 = 0x18; |
| *(uint32_t*)0x205fafd4 = 1; |
| *(uint32_t*)0x205fafd8 = 0; |
| *(uint32_t*)0x205fafdc = r[0]; |
| *(uint16_t*)0x205fafe0 = 2; |
| *(uint16_t*)0x205fafe2 = htobe16(0); |
| *(uint32_t*)0x205fafe4 = htobe32(0xe0000002); |
| *(uint8_t*)0x205fafe8 = 0; |
| *(uint8_t*)0x205fafe9 = 0; |
| *(uint8_t*)0x205fafea = 0; |
| *(uint8_t*)0x205fafeb = 0; |
| *(uint8_t*)0x205fafec = 0; |
| *(uint8_t*)0x205fafed = 0; |
| *(uint8_t*)0x205fafee = 0; |
| *(uint8_t*)0x205fafef = 0; |
| *(uint32_t*)0x205faff0 = 4; |
| *(uint32_t*)0x205faff4 = 0; |
| *(uint32_t*)0x205faff8 = 0; |
| *(uint32_t*)0x205faffc = 0; |
| syscall(__NR_connect, r[1], 0x205fafd2, 0x2e); |
| break; |
| case 5: |
| *(uint64_t*)0x20005fc0 = 0x20005680; |
| *(uint16_t*)0x20005680 = 0x1f; |
| *(uint8_t*)0x20005682 = 0; |
| *(uint8_t*)0x20005683 = 0; |
| *(uint8_t*)0x20005684 = 0; |
| *(uint8_t*)0x20005685 = 0; |
| *(uint8_t*)0x20005686 = 0; |
| *(uint8_t*)0x20005687 = 0; |
| *(uint32_t*)0x20005fc8 = 0x80; |
| *(uint64_t*)0x20005fd0 = 0x20005b00; |
| *(uint64_t*)0x20005fd8 = 0; |
| *(uint64_t*)0x20005fe0 = 0; |
| *(uint64_t*)0x20005fe8 = 0; |
| *(uint32_t*)0x20005ff0 = 0; |
| *(uint32_t*)0x20005ff8 = 0; |
| *(uint64_t*)0x20006000 = 0x20005b80; |
| *(uint16_t*)0x20005b80 = 0x1f; |
| *(uint16_t*)0x20005b82 = 0; |
| *(uint8_t*)0x20005b84 = 0; |
| *(uint8_t*)0x20005b85 = 0; |
| *(uint8_t*)0x20005b86 = 0; |
| *(uint8_t*)0x20005b87 = 0; |
| *(uint8_t*)0x20005b88 = 0; |
| *(uint8_t*)0x20005b89 = 0; |
| *(uint16_t*)0x20005b8a = 0; |
| *(uint8_t*)0x20005b8c = 0; |
| *(uint32_t*)0x20006008 = 0x80; |
| *(uint64_t*)0x20006010 = 0x20005c40; |
| *(uint64_t*)0x20006018 = 0x1f4; |
| *(uint64_t*)0x20006020 = 0x20005c80; |
| *(uint64_t*)0x20006028 = 0x3a00; |
| *(uint32_t*)0x20006030 = 0; |
| *(uint32_t*)0x20006038 = 0; |
| syscall(__NR_sendmmsg, r[1], 0x20005fc0, 0x3e8, 0); |
| break; |
| case 6: |
| syscall(__NR_sendmmsg, r[0], 0x20001b00, 0xb8, 0); |
| break; |
| } |
| } |
| |
| void execute_one() |
| { |
| execute(7); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (;;) { |
| do_sandbox_none(); |
| } |
| } |
