From: Dave Martin <Dave.Martin@arm.com> To: Cristian Marussi <cristian.marussi@arm.com> Cc: linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shuah@kernel.org, amit.kachhap@arm.com, andreyknvl@google.com Subject: Re: [PATCH v5 08/11] kselftest: arm64: fake_sigreturn_missing_fpsimd Date: Wed, 4 Sep 2019 12:49:10 +0100 Message-ID: <20190904114910.GY27757@arm.com> (raw) In-Reply-To: <20190902112932.36129-9-cristian.marussi@arm.com> On Mon, Sep 02, 2019 at 12:29:29pm +0100, Cristian Marussi wrote: > Add a simple fake_sigreturn testcase which builds a ucontext_t without > the required fpsimd_context and place it onto the stack. > Expects a SIGSEGV on test PASS. > > Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> > --- > v3 --> v4 > - fix commit > - added signal.h > - added test description > --- > .../testcases/fake_sigreturn_missing_fpsimd.c | 50 +++++++++++++++++++ > 1 file changed, 50 insertions(+) > create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c > > diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c > new file mode 100644 > index 000000000000..08ecd8073a1a > --- /dev/null > +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c > @@ -0,0 +1,50 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (C) 2019 ARM Limited > + * > + * Place a fake sigframe on the stack missing the mandatory FPSIMD > + * record: on sigreturn Kernel must spot this attempt and the test > + * case is expected to be terminated via SEGV. > + */ > + > +#include <stdio.h> > +#include <signal.h> > +#include <ucontext.h> > + > +#include "test_signals_utils.h" > +#include "testcases.h" > + > +struct fake_sigframe sf; > + > +static int fake_sigreturn_missing_fpsimd_run(struct tdescr *td, > + siginfo_t *si, ucontext_t *uc) > +{ > + size_t resv_sz, offset; > + struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf); > + > + /* just to fill the ucontext_t with something real */ > + if (!get_current_context(td, &sf.uc)) > + return 1; > + > + resv_sz = GET_SF_RESV_SIZE(sf); > + head = get_header(head, FPSIMD_MAGIC, resv_sz, &offset); > + if (head && resv_sz - offset >= HDR_SZ) { > + fprintf(stderr, "Mangling template header. Spare space:%zd\n", > + resv_sz - offset); > + /* Just overwrite fpsmid_context */ > + write_terminator_record(head); Strictly speaking, we may be throwing away more than just the fpsimd_context record here. But I think the test works nonetheless. fpsimd_context is the only record that's mandatory in any case. > + > + ASSERT_BAD_CONTEXT(&sf.uc); > + fake_sigreturn(&sf, sizeof(sf), 0); > + } > + > + return 1; > +} > + > +struct tdescr tde = { > + .name = "FAKE_SIGRETURN_MISSING_FPSIMD", > + .descr = "Triggers a sigreturn with a missing fpsimd_context", > + .sig_ok = SIGSEGV, > + .timeout = 3, > + .run = fake_sigreturn_missing_fpsimd_run, > +}; Assuming the comment I just posted on v3 of this patch makes sense to you, Reviewed-by: Dave Martin <Dave.Martin@arm.com>
next prev parent reply index Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-09-02 11:29 [PATCH v5 00/11] Add arm64/signal initial kselftest support Cristian Marussi 2019-09-02 11:29 ` [PATCH v5 01/11] kselftest: arm64: add skeleton Makefile Cristian Marussi 2019-09-03 9:26 ` Amit Kachhap 2019-09-03 9:45 ` Cristian Marussi 2019-09-05 17:57 ` Cristian Marussi 2019-09-09 12:42 ` Amit Kachhap 2019-09-16 11:41 ` Dave Martin 2019-09-04 11:47 ` Dave Martin 2019-09-05 13:45 ` Cristian Marussi 2019-09-05 14:18 ` Dave Martin 2019-09-02 11:29 ` [PATCH v5 02/11] kselftest: arm64: add common utils and one testcase Cristian Marussi 2019-09-04 11:47 ` Dave Martin 2019-09-06 10:26 ` Cristian Marussi 2019-09-16 11:40 ` Dave Martin 2019-09-02 11:29 ` [PATCH v5 03/11] kselftest: arm64: mangle_pstate_invalid_daif_bits Cristian Marussi 2019-09-04 11:48 ` Dave Martin 2019-09-02 11:29 ` [PATCH v5 04/11] kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht] Cristian Marussi 2019-09-04 11:48 ` Dave Martin 2019-09-02 11:29 ` [PATCH v5 05/11] kselftest: arm64: mangle_pstate_ssbs_regs Cristian Marussi 2019-09-04 11:48 ` Dave Martin 2019-09-09 15:51 ` Cristian Marussi 2019-09-02 11:29 ` [PATCH v5 06/11] kselftest: arm64: fake_sigreturn_bad_magic Cristian Marussi 2019-09-04 11:48 ` Dave Martin 2019-09-09 17:31 ` Cristian Marussi 2019-09-02 11:29 ` [PATCH v5 07/11] kselftest: arm64: fake_sigreturn_bad_size_for_magic0 Cristian Marussi 2019-09-04 11:49 ` Dave Martin 2019-09-09 17:47 ` Cristian Marussi 2019-09-02 11:29 ` [PATCH v5 08/11] kselftest: arm64: fake_sigreturn_missing_fpsimd Cristian Marussi 2019-09-04 11:49 ` Dave Martin [this message] 2019-09-09 17:51 ` Cristian Marussi 2019-09-02 11:29 ` [PATCH v5 09/11] kselftest: arm64: fake_sigreturn_duplicated_fpsimd Cristian Marussi 2019-09-04 11:49 ` Dave Martin 2019-09-05 12:15 ` Cristian Marussi 2019-09-05 12:39 ` Dave Martin 2019-09-05 13:32 ` Cristian Marussi 2019-09-05 14:20 ` Dave Martin 2019-09-09 18:03 ` Cristian Marussi 2019-09-02 11:29 ` [PATCH v5 10/11] kselftest: arm64: fake_sigreturn_bad_size Cristian Marussi 2019-09-04 11:49 ` Dave Martin 2019-09-09 18:11 ` Cristian Marussi 2019-09-02 11:29 ` [PATCH v5 11/11] kselftest: arm64: fake_sigreturn_misaligned_sp Cristian Marussi 2019-09-04 11:49 ` Dave Martin 2019-09-09 18:32 ` Cristian Marussi 2019-09-04 11:47 ` [PATCH v5 00/11] Add arm64/signal initial kselftest support Dave Martin 2019-09-10 12:25 ` Cristian Marussi 2019-09-16 12:14 ` Dave Martin
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20190904114910.GY27757@arm.com \ --to=dave.martin@arm.com \ --cc=amit.kachhap@arm.com \ --cc=andreyknvl@google.com \ --cc=cristian.marussi@arm.com \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kselftest@vger.kernel.org \ --cc=shuah@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
Linux-kselftest Archive on lore.kernel.org Archives are clonable: git clone --mirror https://lore.kernel.org/linux-kselftest/0 linux-kselftest/git/0.git # If you have public-inbox 1.1+ installed, you may # initialize and index your mirror using the following commands: public-inbox-init -V2 linux-kselftest linux-kselftest/ https://lore.kernel.org/linux-kselftest \ linux-kselftest@vger.kernel.org public-inbox-index linux-kselftest Example config snippet for mirrors Newsgroup available over NNTP: nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kselftest AGPL code for this site: git clone https://public-inbox.org/public-inbox.git