// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019 ARM Limited
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*
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* Place a fake sigframe on the stack including a BAD Unknown magic
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* record: on sigreturn Kernel must spot this attempt and the test
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* case is expected to be terminated via SEGV.
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*/
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#include <signal.h>
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#include <ucontext.h>
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#include "test_signals_utils.h"
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#include "testcases.h"
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struct fake_sigframe sf;
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static int fake_sigreturn_bad_magic_run(struct tdescr *td,
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siginfo_t *si, ucontext_t *uc)
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{
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struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head;
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/* just to fill the ucontext_t with something real */
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if (!get_current_context(td, &sf.uc))
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return 1;
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/* need at least 2*HDR_SZ space: KSFT_BAD_MAGIC + terminator. */
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head = get_starting_head(shead, HDR_SZ * 2, GET_SF_RESV_SIZE(sf), NULL);
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if (!head)
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return 0;
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/*
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* use a well known NON existent bad magic...something
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* we should pretty sure won't be ever defined in Kernel
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*/
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head->magic = KSFT_BAD_MAGIC;
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head->size = HDR_SZ;
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write_terminator_record(GET_RESV_NEXT_HEAD(head));
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ASSERT_BAD_CONTEXT(&sf.uc);
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fake_sigreturn(&sf, sizeof(sf), 0);
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return 1;
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}
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struct tdescr tde = {
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.name = "FAKE_SIGRETURN_BAD_MAGIC",
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.descr = "Trigger a sigreturn with a sigframe with a bad magic",
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.sig_ok = SIGSEGV,
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.timeout = 3,
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.run = fake_sigreturn_bad_magic_run,
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};
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