// https://syzkaller.appspot.com/bug?id=e9a7971bd978e3da88d91119df6d6ff84b0da8d8 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include static unsigned long long procid; static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 execute_one(void); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { 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; } } } #ifndef SYS_compat_50_mknod #define SYS_compat_50_mknod 14 #endif #ifndef SYS_fcntl #define SYS_fcntl 92 #endif #ifndef SYS_mmap #define SYS_mmap 197 #endif #ifndef SYS_open #define SYS_open 5 #endif uint64_t r[1] = {0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_compat_50_mknod, 0x20000040ul, 0x2000ul, 0x3100); memcpy((void*)0x20000140, "./file0\000", 8); res = syscall(SYS_open, 0x20000140ul, 1ul, 0ul); if (res != -1) r[0] = res; memcpy((void*)0x20000240, "./file0\000", 8); syscall(SYS_open, 0x20000240ul, 0ul, 0ul); syscall(SYS_fcntl, r[0], 6ul, -1); } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); for (procid = 0; procid < 6; procid++) { if (fork() == 0) { loop(); } } sleep(1000000); return 0; }