| // general protection fault in hsr_check_carrier_and_operstate |
| // https://syzkaller.appspot.com/bug?id=b2b565a0f10ab4195c00ce8e391c466182a464c6 |
| // status:open |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <dirent.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <pthread.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/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <linux/futex.h> |
| |
| 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 void thread_start(void* (*fn)(void*), void* arg) |
| { |
| pthread_t th; |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setstacksize(&attr, 128 << 10); |
| int i; |
| for (i = 0; i < 100; i++) { |
| if (pthread_create(&th, &attr, fn, arg) == 0) { |
| pthread_attr_destroy(&attr); |
| return; |
| } |
| if (errno == EAGAIN) { |
| usleep(50); |
| continue; |
| } |
| break; |
| } |
| exit(1); |
| } |
| |
| typedef struct { |
| int state; |
| } event_t; |
| |
| static void event_init(event_t* ev) |
| { |
| ev->state = 0; |
| } |
| |
| static void event_reset(event_t* ev) |
| { |
| ev->state = 0; |
| } |
| |
| static void event_set(event_t* ev) |
| { |
| if (ev->state) |
| exit(1); |
| __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000); |
| } |
| |
| static void event_wait(event_t* ev) |
| { |
| while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) |
| syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); |
| } |
| |
| static int event_isset(event_t* ev) |
| { |
| return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); |
| } |
| |
| static int event_timedwait(event_t* ev, uint64_t timeout) |
| { |
| uint64_t start = current_time_ms(); |
| uint64_t now = start; |
| for (;;) { |
| uint64_t remain = timeout - (now - start); |
| struct timespec ts; |
| ts.tv_sec = remain / 1000; |
| ts.tv_nsec = (remain % 1000) * 1000 * 1000; |
| syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); |
| if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED)) |
| return 1; |
| now = current_time_ms(); |
| if (now - start > timeout) |
| return 0; |
| } |
| } |
| |
| 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 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"); |
| } |
| |
| struct thread_t { |
| int created, call; |
| event_t ready, done; |
| }; |
| |
| 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 (;;) { |
| event_wait(&th->ready); |
| event_reset(&th->ready); |
| execute_call(th->call); |
| __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); |
| event_set(&th->done); |
| } |
| return 0; |
| } |
| |
| static void execute_one(void) |
| { |
| int i, call, thread; |
| int collide = 0; |
| again: |
| for (call = 0; call < 12; call++) { |
| for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); |
| thread++) { |
| struct thread_t* th = &threads[thread]; |
| if (!th->created) { |
| th->created = 1; |
| event_init(&th->ready); |
| event_init(&th->done); |
| event_set(&th->done); |
| thread_start(thr, th); |
| } |
| if (!event_isset(&th->done)) |
| continue; |
| event_reset(&th->done); |
| th->call = call; |
| __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); |
| event_set(&th->ready); |
| if (collide && (call % 2) == 0) |
| break; |
| event_timedwait(&th->done, 45); |
| break; |
| } |
| } |
| for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) |
| sleep_ms(1); |
| if (!collide) { |
| collide = 1; |
| goto again; |
| } |
| } |
| |
| 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[7] = {0xffffffffffffffff, |
| 0xffffffffffffffff, |
| 0xffffffffffffffff, |
| 0x0, |
| 0xffffffffffffffff, |
| 0xffffffffffffffff, |
| 0x0}; |
| |
| void execute_call(int call) |
| { |
| intptr_t res; |
| switch (call) { |
| case 0: |
| res = syscall(__NR_socket, 0x10ul, 3ul, 0ul); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| res = syscall(__NR_socket, 0x10ul, 3ul, 0ul); |
| if (res != -1) |
| r[1] = res; |
| break; |
| case 2: |
| res = syscall(__NR_socket, 0x10ul, 0x803ul, 0); |
| if (res != -1) |
| r[2] = res; |
| break; |
| case 3: |
| *(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[2], 0x200001c0ul, 0ul); |
| break; |
| case 4: |
| *(uint32_t*)0x20000200 = 0x14; |
| res = syscall(__NR_getsockname, r[2], 0x20000100ul, 0x20000200ul); |
| if (res != -1) |
| r[3] = *(uint32_t*)0x20000104; |
| break; |
| case 5: |
| *(uint64_t*)0x20000180 = 0; |
| *(uint32_t*)0x20000188 = 0; |
| *(uint64_t*)0x20000190 = 0x200000c0; |
| *(uint64_t*)0x200000c0 = 0x20000000; |
| *(uint32_t*)0x20000000 = 0x34; |
| *(uint16_t*)0x20000004 = 0x10; |
| *(uint16_t*)0x20000006 = 0x401; |
| *(uint32_t*)0x20000008 = 0; |
| *(uint32_t*)0x2000000c = 0; |
| *(uint8_t*)0x20000010 = 0; |
| *(uint8_t*)0x20000011 = 0; |
| *(uint16_t*)0x20000012 = 0; |
| *(uint32_t*)0x20000014 = r[3]; |
| *(uint32_t*)0x20000018 = 1; |
| *(uint32_t*)0x2000001c = 0; |
| *(uint16_t*)0x20000020 = 0x14; |
| *(uint16_t*)0x20000022 = 0x12; |
| *(uint16_t*)0x20000024 = 0xb; |
| *(uint16_t*)0x20000026 = 1; |
| memcpy((void*)0x20000028, "bridge\000", 7); |
| *(uint16_t*)0x20000030 = 4; |
| *(uint16_t*)0x20000032 = 2; |
| *(uint64_t*)0x200000c8 = 0x34; |
| *(uint64_t*)0x20000198 = 1; |
| *(uint64_t*)0x200001a0 = 0; |
| *(uint64_t*)0x200001a8 = 0; |
| *(uint32_t*)0x200001b0 = 0; |
| syscall(__NR_sendmsg, r[1], 0x20000180ul, 0ul); |
| break; |
| case 6: |
| res = syscall(__NR_socket, 0x10ul, 3ul, 0ul); |
| if (res != -1) |
| r[4] = res; |
| break; |
| case 7: |
| res = syscall(__NR_socket, 0x10ul, 0x803ul, 0); |
| if (res != -1) |
| r[5] = res; |
| break; |
| case 8: |
| *(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[5], 0x200001c0ul, 0ul); |
| break; |
| case 9: |
| *(uint32_t*)0x20000200 = 0x14; |
| res = syscall(__NR_getsockname, r[5], 0x20000100ul, 0x20000200ul); |
| if (res != -1) |
| r[6] = *(uint32_t*)0x20000104; |
| break; |
| case 10: |
| *(uint64_t*)0x20000180 = 0; |
| *(uint32_t*)0x20000188 = 0xfffffeed; |
| *(uint64_t*)0x20000190 = 0x200000c0; |
| *(uint64_t*)0x200000c0 = 0x20000000; |
| *(uint32_t*)0x20000000 = 0x34; |
| *(uint16_t*)0x20000004 = 0x10; |
| *(uint16_t*)0x20000006 = 0x401; |
| *(uint32_t*)0x20000008 = 0xfffffffd; |
| *(uint32_t*)0x2000000c = 0; |
| *(uint8_t*)0x20000010 = 0; |
| *(uint8_t*)0x20000011 = 0; |
| *(uint16_t*)0x20000012 = 0; |
| *(uint32_t*)0x20000014 = r[6]; |
| *(uint32_t*)0x20000018 = 0xb5c39775; |
| *(uint32_t*)0x2000001c = 0; |
| *(uint16_t*)0x20000020 = 0x14; |
| *(uint16_t*)0x20000022 = 0x12; |
| *(uint16_t*)0x20000024 = 0xc; |
| *(uint16_t*)0x20000026 = 1; |
| memcpy((void*)0x20000028, "bridge\000", 7); |
| *(uint16_t*)0x20000030 = 4; |
| *(uint16_t*)0x20000032 = 2; |
| *(uint64_t*)0x200000c8 = 0x305; |
| *(uint64_t*)0x20000198 = 1; |
| *(uint64_t*)0x200001a0 = 0; |
| *(uint64_t*)0x200001a8 = 0; |
| *(uint32_t*)0x200001b0 = 0; |
| syscall(__NR_sendmsg, r[4], 0x20000180ul, 0ul); |
| break; |
| case 11: |
| *(uint64_t*)0x20000180 = 0; |
| *(uint32_t*)0x20000188 = 0; |
| *(uint64_t*)0x20000190 = 0x20000000; |
| *(uint64_t*)0x20000000 = 0x200001c0; |
| *(uint32_t*)0x200001c0 = 0x48; |
| *(uint16_t*)0x200001c4 = 0x10; |
| *(uint16_t*)0x200001c6 = 0xe3b; |
| *(uint32_t*)0x200001c8 = 0; |
| *(uint32_t*)0x200001cc = 0; |
| *(uint8_t*)0x200001d0 = 0; |
| *(uint8_t*)0x200001d1 = 0; |
| *(uint16_t*)0x200001d2 = 0; |
| *(uint32_t*)0x200001d4 = 0; |
| *(uint32_t*)0x200001d8 = 0; |
| *(uint32_t*)0x200001dc = 0; |
| *(uint16_t*)0x200001e0 = 8; |
| *(uint16_t*)0x200001e2 = 0xa; |
| *(uint32_t*)0x200001e4 = 6; |
| *(uint16_t*)0x200001e8 = 0x20; |
| *(uint16_t*)0x200001ea = 0x12; |
| *(uint16_t*)0x200001ec = 8; |
| *(uint16_t*)0x200001ee = 1; |
| memcpy((void*)0x200001f0, "hsr\000", 4); |
| *(uint16_t*)0x200001f4 = 0x14; |
| *(uint16_t*)0x200001f6 = 2; |
| *(uint16_t*)0x200001f8 = 8; |
| *(uint16_t*)0x200001fa = 2; |
| *(uint32_t*)0x200001fc = r[3]; |
| *(uint16_t*)0x20000200 = 8; |
| *(uint16_t*)0x20000202 = 1; |
| *(uint32_t*)0x20000204 = r[6]; |
| *(uint64_t*)0x20000008 = 0x48; |
| *(uint64_t*)0x20000198 = 1; |
| *(uint64_t*)0x200001a0 = 0; |
| *(uint64_t*)0x200001a8 = 0; |
| *(uint32_t*)0x200001b0 = 0; |
| syscall(__NR_sendmsg, r[0], 0x20000180ul, 0ul); |
| break; |
| } |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0); |
| loop(); |
| return 0; |
| } |