// https://syzkaller.appspot.com/bug?id=4d3dfc53c02ea51ecb55a9bb54f28c9d3bad4eb4 // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include const int kFailStatus = 67; const int kRetryStatus = 69; __attribute__((noreturn)) static void doexit(int status) { volatile unsigned i; syscall(__NR_exit_group, status); for (i = 0;; i++) { } } __attribute__((noreturn)) static void fail(const char* msg, ...) { int e = errno; fflush(stdout); 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); } __attribute__((noreturn)) static void exitf(const char* msg, ...) { int e = errno; fflush(stdout); va_list args; va_start(args, msg); vfprintf(stderr, msg, args); va_end(args); fprintf(stderr, " (errno %d)\n", e); doexit(kRetryStatus); } 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("clone 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[10]; void test() { memset(r, -1, sizeof(r)); r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfec000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); r[1] = syscall(__NR_inotify_init1, 0x80000ul); *(uint32_t*)0x20feb000 = (uint32_t)0xc; r[3] = syscall(__NR_getsockopt, 0xfffffffffffffffful, 0x1ul, 0x11ul, 0x2003cff4ul, 0x20feb000ul); if (r[3] != -1) r[4] = *(uint32_t*)0x2003cff4; r[5] = syscall(__NR_fcntl, r[1], 0x8ul, r[4]); r[6] = syscall(__NR_fcntl, r[1], 0x10ul, 0x20f9cff8ul); if (r[6] != -1) r[7] = *(uint32_t*)0x20f9cffc; r[8] = syscall(__NR_ptrace, 0x10ul, r[7]); r[9] = syscall(__NR_ptrace, 0x4200ul, r[7], 0x40000012ul, 0x100012ul); } int main() { int i; for (i = 0; i < 8; i++) { if (fork() == 0) { loop(); return 0; } } sleep(1000000); return 0; }