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Fri, 07 Apr 2023 10:18:56 -0700 (PDT) Received: from fedora.mshome.net ([104.184.156.161]) by smtp.gmail.com with ESMTPSA id l9-20020a9d7349000000b006a2ddc13c46sm1816730otk.78.2023.04.07.10.18.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Apr 2023 10:18:55 -0700 (PDT) From: Gregory Price X-Google-Original-From: Gregory Price To: linux-kernel@vger.kernel.org Cc: linux-doc@vger.kernel.org, linux-arch@vger.kernel.org, oleg@redhat.com, avagin@gmail.com, peterz@infradead.org, luto@kernel.org, krisman@collabora.com, tglx@linutronix.de, corbet@lwn.net, shuah@kernel.org, catalin.marinas@arm.com, arnd@arndb.de, Gregory Price Subject: [PATCH v16 4/4] selftest,ptrace: Add selftest for syscall user dispatch config api Date: Fri, 7 Apr 2023 13:18:34 -0400 Message-Id: <20230407171834.3558-5-gregory.price@memverge.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230407171834.3558-1-gregory.price@memverge.com> References: <20230407171834.3558-1-gregory.price@memverge.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Validate that the following new ptrace requests work as expected * PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG - returns the contents of task->syscall_dispatch if enabled * PTRACE_SET_SYSCALL_USER_DISPATCH_CONFIG - sets the contents of task->syscall_dispatch Signed-off-by: Gregory Price --- tools/testing/selftests/ptrace/.gitignore | 1 + tools/testing/selftests/ptrace/Makefile | 2 +- tools/testing/selftests/ptrace/get_set_sud.c | 72 ++++++++++++++++++++ 3 files changed, 74 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/ptrace/get_set_sud.c diff --git a/tools/testing/selftests/ptrace/.gitignore b/tools/testing/self= tests/ptrace/.gitignore index 792318aaa30c..b7dde152e75a 100644 --- a/tools/testing/selftests/ptrace/.gitignore +++ b/tools/testing/selftests/ptrace/.gitignore @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only get_syscall_info +get_set_sud peeksiginfo vmaccess diff --git a/tools/testing/selftests/ptrace/Makefile b/tools/testing/selfte= sts/ptrace/Makefile index 2f1f532c39db..33a36b73bcb9 100644 --- a/tools/testing/selftests/ptrace/Makefile +++ b/tools/testing/selftests/ptrace/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only CFLAGS +=3D -std=3Dc99 -pthread -iquote../../../../include/uapi -Wall =20 -TEST_GEN_PROGS :=3D get_syscall_info peeksiginfo vmaccess +TEST_GEN_PROGS :=3D get_syscall_info peeksiginfo vmaccess get_set_sud =20 include ../lib.mk diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/s= elftests/ptrace/get_set_sud.c new file mode 100644 index 000000000000..5297b10d25c3 --- /dev/null +++ b/tools/testing/selftests/ptrace/get_set_sud.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE +#include "../kselftest_harness.h" +#include +#include +#include +#include +#include +#include + +#include "linux/ptrace.h" + +static int sys_ptrace(int request, pid_t pid, void *addr, void *data) +{ + return syscall(SYS_ptrace, request, pid, addr, data); +} + +TEST(get_set_sud) +{ + struct ptrace_sud_config config; + pid_t child; + int ret =3D 0; + int status; + + child =3D fork(); + ASSERT_GE(child, 0); + if (child =3D=3D 0) { + ASSERT_EQ(0, sys_ptrace(PTRACE_TRACEME, 0, 0, 0)) { + TH_LOG("PTRACE_TRACEME: %m"); + } + kill(getpid(), SIGSTOP); + _exit(1); + } + + waitpid(child, &status, 0); + + memset(&config, 0xff, sizeof(config)); + config.mode =3D PR_SYS_DISPATCH_ON; + + ret =3D sys_ptrace(PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG, child, + (void *)sizeof(config), &config); + + ASSERT_EQ(ret, 0); + ASSERT_EQ(config.mode, PR_SYS_DISPATCH_OFF); + ASSERT_EQ(config.selector, 0); + ASSERT_EQ(config.offset, 0); + ASSERT_EQ(config.len, 0); + + config.mode =3D PR_SYS_DISPATCH_ON; + config.selector =3D 0; + config.offset =3D 0x400000; + config.len =3D 0x1000; + + ret =3D sys_ptrace(PTRACE_SET_SYSCALL_USER_DISPATCH_CONFIG, child, + (void *)sizeof(config), &config); + + ASSERT_EQ(ret, 0); + + memset(&config, 1, sizeof(config)); + ret =3D sys_ptrace(PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG, child, + (void *)sizeof(config), &config); + + ASSERT_EQ(ret, 0); + ASSERT_EQ(config.mode, PR_SYS_DISPATCH_ON); + ASSERT_EQ(config.selector, 0); + ASSERT_EQ(config.offset, 0x400000); + ASSERT_EQ(config.len, 0x1000); + + kill(child, SIGKILL); +} + +TEST_HARNESS_MAIN --=20 2.39.1