| // WARNING: ODEBUG bug in p9_fd_close |
| // https://syzkaller.appspot.com/bug?id=b1259f9a8ed763aa4914809e9ae43d4d1fcc8b26 |
| // status:open |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <errno.h> |
| #include <linux/futex.h> |
| #include <pthread.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/prctl.h> |
| #include <sys/syscall.h> |
| #include <sys/time.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 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; |
| } |
| } |
| } |
| } |
| |
| #ifndef __NR_write |
| #define __NR_write 4 |
| #endif |
| #ifndef __NR_mount |
| #define __NR_mount 21 |
| #endif |
| #ifndef __NR_mmap |
| #define __NR_mmap 192 |
| #endif |
| #ifndef __NR_removexattr |
| #define __NR_removexattr 235 |
| #endif |
| #ifndef __NR_mkdir |
| #define __NR_mkdir 39 |
| #endif |
| #ifndef __NR_pipe2 |
| #define __NR_pipe2 331 |
| #endif |
| #undef __NR_mmap |
| #define __NR_mmap __NR_mmap2 |
| |
| uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; |
| unsigned long long procid; |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| memcpy((void*)0x20000000, "./file0", 8); |
| memcpy((void*)0x20000040, "system.", 7); |
| memcpy((void*)0x20000047, "eth1,", 6); |
| syscall(__NR_removexattr, 0x20000000, 0x20000040); |
| break; |
| case 1: |
| memcpy((void*)0x20000080, "./file0", 8); |
| syscall(__NR_mkdir, 0x20000080, 2); |
| break; |
| case 2: |
| res = syscall(__NR_pipe2, 0x200000c0, 0x80000); |
| if (res != -1) { |
| r[0] = *(uint32_t*)0x200000c0; |
| r[1] = *(uint32_t*)0x200000c4; |
| } |
| break; |
| case 3: |
| *(uint32_t*)0x20000100 = 0x10; |
| *(uint8_t*)0x20000104 = 0x17; |
| *(uint16_t*)0x20000105 = 1; |
| *(uint16_t*)0x20000107 = 7; |
| memcpy((void*)0x20000109, "./file0", 7); |
| syscall(__NR_write, r[1], 0x20000100, 0x10); |
| break; |
| case 4: |
| memcpy((void*)0x20002d00, "./file0", 8); |
| memcpy((void*)0x20002d40, "9p", 3); |
| memcpy((void*)0x20002d80, "trans=fd,", 9); |
| memcpy((void*)0x20002d89, "rfdno", 5); |
| *(uint8_t*)0x20002d8e = 0x3d; |
| sprintf((char*)0x20002d8f, "0x%016llx", (long long)r[0]); |
| *(uint8_t*)0x20002da1 = 0x2c; |
| memcpy((void*)0x20002da2, "wfdno", 5); |
| *(uint8_t*)0x20002da7 = 0x3d; |
| sprintf((char*)0x20002da8, "0x%016llx", (long long)r[0]); |
| *(uint8_t*)0x20002dba = 0x2c; |
| memcpy((void*)0x20002dbb, "access", 6); |
| *(uint8_t*)0x20002dc1 = 0x3d; |
| sprintf((char*)0x20002dc2, "%020llu", (long long)0); |
| *(uint8_t*)0x20002dd6 = 0x2c; |
| memcpy((void*)0x20002dd7, "dfltuid", 7); |
| *(uint8_t*)0x20002dde = 0x3d; |
| sprintf((char*)0x20002ddf, "0x%016llx", (long long)0); |
| *(uint8_t*)0x20002df1 = 0x2c; |
| memcpy((void*)0x20002df2, "dfltuid", 7); |
| *(uint8_t*)0x20002df9 = 0x3d; |
| sprintf((char*)0x20002dfa, "0x%016llx", (long long)0); |
| *(uint8_t*)0x20002e0c = 0x2c; |
| memcpy((void*)0x20002e0d, "access=client", 13); |
| *(uint8_t*)0x20002e1a = 0x2c; |
| *(uint8_t*)0x20002e1b = 0; |
| syscall(__NR_mount, 0, 0x20002d00, 0x20002d40, 0x200000, 0x20002d80); |
| break; |
| } |
| } |
| |
| void execute_one() |
| { |
| execute(5); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (procid = 0; procid < 8; procid++) { |
| if (fork() == 0) { |
| for (;;) { |
| loop(); |
| } |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |