| // WARNING in sk_stream_kill_queues (3) |
| // https://syzkaller.appspot.com/bug?id=1557fb40b5ed0a1ed2ba18268e04da194674d770 |
| // status:open |
| // 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 <stdio.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 <setjmp.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.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 __thread int skip_segv; |
| static __thread jmp_buf segv_env; |
| |
| static void segv_handler(int sig, siginfo_t* info, void* uctx) |
| { |
| uintptr_t addr = (uintptr_t)info->si_addr; |
| const uintptr_t prog_start = 1 << 20; |
| const uintptr_t prog_end = 100 << 20; |
| if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) && |
| (addr < prog_start || addr > prog_end)) { |
| _longjmp(segv_env, 1); |
| } |
| doexit(sig); |
| } |
| |
| static void install_segv_handler() |
| { |
| struct sigaction sa; |
| |
| memset(&sa, 0, sizeof(sa)); |
| sa.sa_handler = SIG_IGN; |
| syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); |
| syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); |
| |
| memset(&sa, 0, sizeof(sa)); |
| sa.sa_sigaction = segv_handler; |
| sa.sa_flags = SA_NODEFER | SA_SIGINFO; |
| sigaction(SIGSEGV, &sa, NULL); |
| sigaction(SIGBUS, &sa, NULL); |
| } |
| |
| #define NONFAILING(...) \ |
| { \ |
| __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ |
| if (_setjmp(segv_env) == 0) { \ |
| __VA_ARGS__; \ |
| } \ |
| __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ |
| } |
| |
| 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)) { |
| } |
| } |
| |
| static int do_sandbox_none(void) |
| { |
| if (unshare(CLONE_NEWPID)) { |
| } |
| int pid = fork(); |
| if (pid < 0) |
| fail("sandbox fork failed"); |
| if (pid) |
| return 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(); |
| 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 < 3 * 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 int collide; |
| |
| 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); |
| if (collide && call % 2) |
| break; |
| struct timespec ts; |
| ts.tv_sec = 0; |
| ts.tv_nsec = 20 * 1000 * 1000; |
| syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts); |
| if (running) |
| usleep((call == num_calls - 1) ? 10000 : 1000); |
| break; |
| } |
| } |
| } |
| } |
| |
| uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| res = syscall(__NR_socket, 0xa, 1, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| syscall(__NR_ioctl, r[0], 3, 0x200001c0); |
| break; |
| case 2: |
| res = syscall(__NR_socket, 0xa, 1, 0); |
| if (res != -1) |
| r[1] = res; |
| break; |
| case 3: |
| NONFAILING(*(uint32_t*)0x200000c0 = 1); |
| syscall(__NR_setsockopt, r[1], 6, 0x13, 0x200000c0, 4); |
| break; |
| case 4: |
| NONFAILING(*(uint16_t*)0x20000640 = 0xa); |
| NONFAILING(*(uint16_t*)0x20000642 = htobe16(0)); |
| NONFAILING(*(uint32_t*)0x20000644 = 0); |
| NONFAILING(*(uint8_t*)0x20000648 = 0xfe); |
| NONFAILING(*(uint8_t*)0x20000649 = 0x80); |
| NONFAILING(*(uint8_t*)0x2000064a = 0); |
| NONFAILING(*(uint8_t*)0x2000064b = 0); |
| NONFAILING(*(uint8_t*)0x2000064c = 0); |
| NONFAILING(*(uint8_t*)0x2000064d = 0); |
| NONFAILING(*(uint8_t*)0x2000064e = 0); |
| NONFAILING(*(uint8_t*)0x2000064f = 0); |
| NONFAILING(*(uint8_t*)0x20000650 = 0); |
| NONFAILING(*(uint8_t*)0x20000651 = 0); |
| NONFAILING(*(uint8_t*)0x20000652 = 0); |
| NONFAILING(*(uint8_t*)0x20000653 = 0); |
| NONFAILING(*(uint8_t*)0x20000654 = 0); |
| NONFAILING(*(uint8_t*)0x20000655 = 0); |
| NONFAILING(*(uint8_t*)0x20000656 = 0); |
| NONFAILING(*(uint8_t*)0x20000657 = 0xbb); |
| NONFAILING(*(uint32_t*)0x20000658 = 0); |
| NONFAILING(*(uint16_t*)0x200006c0 = 0); |
| NONFAILING(*(uint16_t*)0x200006c2 = 1); |
| NONFAILING(*(uint32_t*)0x200006c4 = 0); |
| NONFAILING(memcpy((void*)0x200006c8, |
| "\x0d\x77\xbd\xed\x71\x25\x33\x8d\xe4\x71\x45\xb7\x1f\x22" |
| "\x26\xc0\xb6\x95\x0f\xeb\xa5\x7b\x7d\x52\xd9\xe6\xd1\x35" |
| "\x09\xbb\x60\x2e\x48\x18\x22\x46\x96\xda\xfe\x09\xc2\x5e" |
| "\xd1\xd5\xe1\xe8\xdd\x95\x25\xd4\x42\x5e\x2c\x47\x07\xa0" |
| "\x0f\x8d\xd4\x7a\x4c\x19\xb8\x84\x28\x2e\x4f\x74\x3e\x00" |
| "\xc7\xa3\xef\xf5\x99\xb1\x3d\x51\x8d\x10", |
| 80)); |
| syscall(__NR_setsockopt, r[1], 6, 0xe, 0x20000640, 0xd8); |
| break; |
| case 5: |
| NONFAILING(*(uint16_t*)0x20000140 = 0xa); |
| NONFAILING(*(uint16_t*)0x20000142 = htobe16(0)); |
| NONFAILING(*(uint32_t*)0x20000144 = 0); |
| NONFAILING(*(uint64_t*)0x20000148 = htobe64(0)); |
| NONFAILING(*(uint64_t*)0x20000150 = htobe64(1)); |
| NONFAILING(*(uint32_t*)0x20000158 = 0); |
| syscall(__NR_connect, r[1], 0x20000140, 0x1c); |
| break; |
| case 6: |
| NONFAILING(memcpy((void*)0x20000340, "tls", 4)); |
| syscall(__NR_setsockopt, r[1], 6, 0x1f, 0x20000340, 4); |
| break; |
| case 7: |
| NONFAILING(*(uint16_t*)0x20000100 = 0x303); |
| NONFAILING(*(uint16_t*)0x20000102 = 0x33); |
| syscall(__NR_setsockopt, r[1], 0x11a, 1, 0x20000100, 0x28); |
| break; |
| case 8: |
| NONFAILING(*(uint16_t*)0x20000000 = 0xa); |
| NONFAILING(*(uint16_t*)0x20000002 = htobe16(0)); |
| NONFAILING(*(uint32_t*)0x20000004 = 0); |
| NONFAILING(*(uint8_t*)0x20000008 = 0xfe); |
| NONFAILING(*(uint8_t*)0x20000009 = 0x80); |
| NONFAILING(*(uint8_t*)0x2000000a = 0); |
| NONFAILING(*(uint8_t*)0x2000000b = 0); |
| NONFAILING(*(uint8_t*)0x2000000c = 0); |
| NONFAILING(*(uint8_t*)0x2000000d = 0); |
| NONFAILING(*(uint8_t*)0x2000000e = 0); |
| NONFAILING(*(uint8_t*)0x2000000f = 0); |
| NONFAILING(*(uint8_t*)0x20000010 = 0); |
| NONFAILING(*(uint8_t*)0x20000011 = 0); |
| NONFAILING(*(uint8_t*)0x20000012 = 0); |
| NONFAILING(*(uint8_t*)0x20000013 = 0); |
| NONFAILING(*(uint8_t*)0x20000014 = 0); |
| NONFAILING(*(uint8_t*)0x20000015 = 0); |
| NONFAILING(*(uint8_t*)0x20000016 = 0); |
| NONFAILING(*(uint8_t*)0x20000017 = 0xbb); |
| NONFAILING(*(uint32_t*)0x20000018 = 0); |
| syscall(__NR_sendto, r[1], 0x200005c0, 0xfffffdef, 0, 0x20000000, 0x1c); |
| break; |
| case 9: |
| res = syscall(__NR_socket, 2, 1, 0); |
| if (res != -1) |
| r[2] = res; |
| break; |
| case 10: |
| NONFAILING(*(uint16_t*)0x20c16ff0 = 2); |
| NONFAILING(*(uint16_t*)0x20c16ff2 = htobe16(1)); |
| NONFAILING(*(uint32_t*)0x20c16ff4 = htobe32(0xe0000001)); |
| NONFAILING(*(uint8_t*)0x20c16ff8 = 0); |
| NONFAILING(*(uint8_t*)0x20c16ff9 = 0); |
| NONFAILING(*(uint8_t*)0x20c16ffa = 0); |
| NONFAILING(*(uint8_t*)0x20c16ffb = 0); |
| NONFAILING(*(uint8_t*)0x20c16ffc = 0); |
| NONFAILING(*(uint8_t*)0x20c16ffd = 0); |
| NONFAILING(*(uint8_t*)0x20c16ffe = 0); |
| NONFAILING(*(uint8_t*)0x20c16fff = 0); |
| syscall(__NR_bind, r[2], 0x20c16ff0, 0x10); |
| break; |
| case 11: |
| NONFAILING(*(uint16_t*)0x20e97fcf = 2); |
| NONFAILING(*(uint16_t*)0x20e97fd1 = htobe16(1)); |
| NONFAILING(*(uint32_t*)0x20e97fd3 = htobe32(0x7f000001)); |
| NONFAILING(*(uint8_t*)0x20e97fd7 = 0); |
| NONFAILING(*(uint8_t*)0x20e97fd8 = 0); |
| NONFAILING(*(uint8_t*)0x20e97fd9 = 0); |
| NONFAILING(*(uint8_t*)0x20e97fda = 0); |
| NONFAILING(*(uint8_t*)0x20e97fdb = 0); |
| NONFAILING(*(uint8_t*)0x20e97fdc = 0); |
| NONFAILING(*(uint8_t*)0x20e97fdd = 0); |
| NONFAILING(*(uint8_t*)0x20e97fde = 0); |
| syscall(__NR_sendto, r[2], 0x20fa0fff, 0xffffffffffffffc3, 0x20020007, |
| 0x20e97fcf, 0x10); |
| break; |
| } |
| } |
| |
| void execute_one() |
| { |
| execute(12); |
| collide = 1; |
| execute(12); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| install_segv_handler(); |
| for (;;) { |
| int pid = do_sandbox_none(); |
| int status = 0; |
| while (waitpid(pid, &status, __WALL) != pid) { |
| } |
| } |
| } |
