| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2019 ARM Limited |
| * |
| * Place a fake sigframe on the stack including a badly sized terminator |
| * record: on sigreturn Kernel must spot this attempt and the test case |
| * is expected to be terminated via SEGV. |
| */ |
| |
| #include <signal.h> |
| #include <ucontext.h> |
| |
| #include "test_signals_utils.h" |
| #include "testcases.h" |
| |
| struct fake_sigframe sf; |
| |
| static int fake_sigreturn_bad_size_for_magic0_run(struct tdescr *td, |
| siginfo_t *si, ucontext_t *uc) |
| { |
| struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head; |
| |
| /* just to fill the ucontext_t with something real */ |
| if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) |
| return 1; |
| |
| /* at least HDR_SZ for the badly sized terminator. */ |
| head = get_starting_head(shead, HDR_SZ, GET_SF_RESV_SIZE(sf), NULL); |
| if (!head) |
| return 0; |
| |
| head->magic = 0; |
| head->size = HDR_SZ; |
| ASSERT_BAD_CONTEXT(&sf.uc); |
| fake_sigreturn(&sf, sizeof(sf), 0); |
| |
| return 1; |
| } |
| |
| struct tdescr tde = { |
| .name = "FAKE_SIGRETURN_BAD_SIZE_FOR_TERMINATOR", |
| .descr = "Trigger a sigreturn using non-zero size terminator", |
| .sig_ok = SIGSEGV, |
| .timeout = 3, |
| .run = fake_sigreturn_bad_size_for_magic0_run, |
| }; |