// https://syzkaller.appspot.com/bug?id=e2fe06b813f900f9c187da84bfd42eab23d0b84c // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include __attribute__((noreturn)) static void doexit(int status) { volatile unsigned i; syscall(__NR_exit_group, status); for (i = 0;; i++) { } } #include #include 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 test(); void loop() { int iter; for (iter = 0;; iter++) { int pid = fork(); if (pid < 0) fail("loop fork failed"); if (pid == 0) { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); test(); 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) { kill(-pid, SIGKILL); kill(pid, SIGKILL); while (waitpid(-1, &status, __WALL) != pid) { } break; } } } } long r[3]; uint64_t procid; void test() { memset(r, -1, sizeof(r)); syscall(__NR_mmap, 0x20000000, 0xfec000, 0x3, 0x32, 0xffffffff, 0x0); r[0] = syscall(__NR_inotify_init1, 0x80000); *(uint32_t*)0x20feb000 = 0xc; if (syscall(__NR_getsockopt, 0xffffffff, 0x1, 0x11, 0x2003cff4, 0x20feb000) != -1) { r[1] = *(uint32_t*)0x2003cff4; } syscall(__NR_fcntl, r[0], 0x8, r[1]); if (syscall(__NR_fcntl, r[0], 0x10, 0x20f9cff8) != -1) { r[2] = *(uint32_t*)0x20f9cffc; } syscall(__NR_ptrace, 0x10, r[2]); syscall(__NR_ptrace, 0x4200, r[2], 0x40000012, 0x100012); } int main() { int i; for (i = 0; i < 8; i++) { if (fork() == 0) { procid = i; loop(); return 0; } } sleep(1000000); return 0; }