// https://syzkaller.appspot.com/bug?id=7c48f2a02168c6d8581d28dcc5c3c5b7a7c52f21 // 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 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 (;;) { sleep_ms(10); if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[1] = {0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } memcpy((void*)0x20000540, "/dev/mdctl\000", 11); res = syscall(SYS_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000540ul, /*flags=*/0ul, /*mode=*/0ul); if (res != -1) r[0] = res; *(uint32_t*)0x20000380 = 0; *(uint32_t*)0x20000384 = 0; *(uint32_t*)0x20000388 = 0; *(uint64_t*)0x20000390 = 0; *(uint64_t*)0x20000398 = 0x80008; *(uint32_t*)0x200003a0 = 1; *(uint32_t*)0x200003a4 = 6; *(uint64_t*)0x200003a8 = 0; *(uint32_t*)0x200003b0 = 3; *(uint32_t*)0x200003b4 = 0; *(uint64_t*)0x200003b8 = 0; *(uint32_t*)0x200003c0 = 0; *(uint32_t*)0x200003c4 = 0; *(uint32_t*)0x200003c8 = 0; *(uint32_t*)0x200003cc = 0xc; *(uint32_t*)0x200003d0 = 0; *(uint32_t*)0x200003d4 = 0; *(uint32_t*)0x200003d8 = 0; *(uint32_t*)0x200003dc = 0; *(uint32_t*)0x200003e0 = 0; *(uint32_t*)0x200003e4 = 0; *(uint32_t*)0x200003e8 = 0; *(uint32_t*)0x200003ec = 0; *(uint32_t*)0x200003f0 = 9; *(uint32_t*)0x200003f4 = 0; *(uint32_t*)0x200003f8 = 0; *(uint32_t*)0x200003fc = 0; *(uint32_t*)0x20000400 = 0; *(uint32_t*)0x20000404 = 0; *(uint32_t*)0x20000408 = 1; *(uint32_t*)0x2000040c = 0; *(uint32_t*)0x20000410 = 0; *(uint32_t*)0x20000414 = 0; *(uint32_t*)0x20000418 = 0; *(uint32_t*)0x2000041c = 0; *(uint32_t*)0x20000420 = 0; *(uint32_t*)0x20000424 = 0; *(uint32_t*)0x20000428 = 0; *(uint32_t*)0x2000042c = 0; *(uint32_t*)0x20000430 = 0; *(uint32_t*)0x20000434 = 1; *(uint32_t*)0x20000438 = 0; *(uint32_t*)0x2000043c = 0; *(uint32_t*)0x20000440 = 0; *(uint32_t*)0x20000444 = 0; *(uint32_t*)0x20000448 = 0; *(uint32_t*)0x2000044c = 0; *(uint32_t*)0x20000450 = 0; *(uint32_t*)0x20000454 = 0; *(uint32_t*)0x20000458 = 0; *(uint32_t*)0x2000045c = 0; *(uint32_t*)0x20000460 = 0; *(uint32_t*)0x20000464 = 0; *(uint32_t*)0x20000468 = 0; *(uint32_t*)0x2000046c = 0; *(uint32_t*)0x20000470 = 0; *(uint32_t*)0x20000474 = 0; *(uint32_t*)0x20000478 = 0xf; *(uint32_t*)0x2000047c = 0; *(uint32_t*)0x20000480 = 0; *(uint32_t*)0x20000484 = 4; *(uint32_t*)0x20000488 = 0; *(uint32_t*)0x2000048c = 0; *(uint32_t*)0x20000490 = 0; *(uint32_t*)0x20000494 = 0; *(uint32_t*)0x20000498 = 0; *(uint32_t*)0x2000049c = 0; *(uint32_t*)0x200004a0 = 0; *(uint32_t*)0x200004a4 = 0; *(uint32_t*)0x200004a8 = 0; *(uint32_t*)0x200004ac = 0; *(uint32_t*)0x200004b0 = 0; *(uint32_t*)0x200004b4 = 0; *(uint32_t*)0x200004b8 = 0; *(uint32_t*)0x200004bc = 0; *(uint32_t*)0x200004c0 = 0; *(uint32_t*)0x200004c4 = 0x10000000; *(uint32_t*)0x200004c8 = 0; *(uint32_t*)0x200004cc = 0; *(uint32_t*)0x200004d0 = 0; *(uint32_t*)0x200004d4 = 0; *(uint32_t*)0x200004d8 = 0; *(uint32_t*)0x200004dc = 0; *(uint32_t*)0x200004e0 = 0; *(uint32_t*)0x200004e4 = 0; *(uint32_t*)0x200004e8 = 0; *(uint32_t*)0x200004ec = 0; *(uint32_t*)0x200004f0 = 0; *(uint32_t*)0x200004f4 = 0; *(uint32_t*)0x200004f8 = 0; *(uint32_t*)0x200004fc = 0; *(uint32_t*)0x20000500 = 0; *(uint32_t*)0x20000504 = 0; *(uint32_t*)0x20000508 = 0; *(uint32_t*)0x2000050c = 0; *(uint32_t*)0x20000510 = 0; *(uint32_t*)0x20000514 = 0; *(uint32_t*)0x20000518 = 0; *(uint32_t*)0x2000051c = 0; *(uint32_t*)0x20000520 = 0; *(uint32_t*)0x20000524 = 0; *(uint32_t*)0x20000528 = 0; *(uint32_t*)0x2000052c = 0; *(uint32_t*)0x20000530 = 0; *(uint32_t*)0x20000534 = 0; *(uint32_t*)0x20000538 = 4; *(uint32_t*)0x2000053c = 0; syscall(SYS_ioctl, /*fd=*/r[0], /*cmd=*/0xc1c06d00ul, /*arg=*/0x20000380ul); } int main(void) { syscall(SYS_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x1012ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; loop(); return 0; }