May 2023 - Linux-kselftest-mirror

[PATCH] kunit: Fix obsolete name in documentation headers (func->action)

by David Gow

The kunit_add_action() and related functions named the kunit_action_t parameter 'func' in early drafts, which was later renamed to 'action' However, the doc comments were not properly updated. Fix these to avoid confusion and 'make htmldocs' warnings. Fixes: b9dce8a1ed3e ("kunit: Add kunit_add_action() to defer a call until test exit") Reported-by: Stephen Rothwell <sfr(a)canb.auug.org.au> Closes: https://lore.kernel.org/lkml/20230530151840.16a56460@canb.auug.org.au/ Signed-off-by: David Gow <davidgow(a)google.com> --- include/kunit/resource.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/include/kunit/resource.h b/include/kunit/resource.h index b64eb783b1bc..c7383e90f5c9 100644 --- a/include/kunit/resource.h +++ b/include/kunit/resource.h @@ -393,7 +393,7 @@ typedef void (kunit_action_t)(void *); /** * kunit_add_action() - Call a function when the test ends. * @test: Test case to associate the action with. - * @func: The function to run on test exit + * @action: The function to run on test exit * @ctx: Data passed into @func * * Defer the execution of a function until the test exits, either normally or @@ -415,7 +415,7 @@ int kunit_add_action(struct kunit *test, kunit_action_t *action, void *ctx); /** * kunit_add_action_or_reset() - Call a function when the test ends. * @test: Test case to associate the action with. - * @func: The function to run on test exit + * @action: The function to run on test exit * @ctx: Data passed into @func * * Defer the execution of a function until the test exits, either normally or @@ -441,7 +441,7 @@ int kunit_add_action_or_reset(struct kunit *test, kunit_action_t *action, /** * kunit_remove_action() - Cancel a matching deferred action. * @test: Test case the action is associated with. - * @func: The deferred function to cancel. + * @action: The deferred function to cancel. * @ctx: The context passed to the deferred function to trigger. * * Prevent an action deferred via kunit_add_action() from executing when the @@ -459,7 +459,7 @@ void kunit_remove_action(struct kunit *test, /** * kunit_release_action() - Run a matching action call immediately. * @test: Test case the action is associated with. - * @func: The deferred function to trigger. + * @action: The deferred function to trigger. * @ctx: The context passed to the deferred function to trigger. * * Execute a function deferred via kunit_add_action()) immediately, rather than -- 2.41.0.rc0.172.g3f132b7071-goog

1 year

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[PATCH] Documentation: Kunit: add MODULE_LICENSE to sample code

by Takashi Sakamoto

The sample code has Kconfig for tristate configuration. In the case, it could be friendly to developers that the code has MODULE_LICENSE, since the missing MODULE_LICENSE brings error to modpost when the code is built as loadable kernel module. Signed-off-by: Takashi Sakamoto <o-takashi(a)sakamocchi.jp> --- Documentation/dev-tools/kunit/start.rst | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/dev-tools/kunit/start.rst b/Documentation/dev-tools/kunit/start.rst index c736613c9b19..d4f99ef94f71 100644 --- a/Documentation/dev-tools/kunit/start.rst +++ b/Documentation/dev-tools/kunit/start.rst @@ -250,6 +250,8 @@ Now we are ready to write the test cases. }; kunit_test_suite(misc_example_test_suite); + MODULE_LICENSE("GPL"); + 2. Add the following lines to ``drivers/misc/Kconfig``: .. code-block:: kconfig -- 2.39.2

1 year

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[PATCH V3] tracing/user_events: Prevent same name but different args event

by sunliming

User processes register name_args for events. If the same name but different args event are registered. The trace outputs of second event are printed as the first event. This is incorrect. Return EADDRINUSE back to the user process if the same name but different args event has being registered. Signed-off-by: sunliming <sunliming(a)kylinos.cn> --- kernel/trace/trace_events_user.c | 36 +++++++++++++++---- .../selftests/user_events/ftrace_test.c | 6 ++++ 2 files changed, 36 insertions(+), 6 deletions(-) diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c index b1ecd7677642..e90161294698 100644 --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -1753,6 +1753,8 @@ static int user_event_parse(struct user_event_group *group, char *name, int ret; u32 key; struct user_event *user; + int argc = 0; + char **argv; /* Prevent dyn_event from racing */ mutex_lock(&event_mutex); @@ -1760,13 +1762,35 @@ static int user_event_parse(struct user_event_group *group, char *name, mutex_unlock(&event_mutex); if (user) { - *newuser = user; - /* - * Name is allocated by caller, free it since it already exists. - * Caller only worries about failure cases for freeing. - */ - kfree(name); + if (args) { + argv = argv_split(GFP_KERNEL, args, &argc); + if (!argv) { + ret = -ENOMEM; + goto error; + } + + ret = user_fields_match(user, argc, (const char **)argv); + argv_free(argv); + + } else + ret = list_empty(&user->fields); + + if (ret) { + *newuser = user; + /* + * Name is allocated by caller, free it since it already exists. + * Caller only worries about failure cases for freeing. + */ + kfree(name); + } else { + ret = -EADDRINUSE; + goto error; + } + return 0; +error: + refcount_dec(&user->refcnt); + return ret; } user = kzalloc(sizeof(*user), GFP_KERNEL_ACCOUNT); diff --git a/tools/testing/selftests/user_events/ftrace_test.c b/tools/testing/selftests/user_events/ftrace_test.c index 7c99cef94a65..6e8c4b47281c 100644 --- a/tools/testing/selftests/user_events/ftrace_test.c +++ b/tools/testing/selftests/user_events/ftrace_test.c @@ -228,6 +228,12 @@ TEST_F(user, register_events) { ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg)); ASSERT_EQ(0, reg.write_index); + /* Multiple registers to same name but different args should fail */ + reg.enable_bit = 29; + reg.name_args = (__u64)"__test_event u32 field1;"; + ASSERT_EQ(-1, ioctl(self->data_fd, DIAG_IOCSREG, &reg)); + ASSERT_EQ(EADDRINUSE, errno); + /* Ensure disabled */ self->enable_fd = open(enable_file, O_RDWR); ASSERT_NE(-1, self->enable_fd); -- 2.25.1

1 year

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Hallo

by marine medic

Hallo, es tut mir so leid, Ihre Privatsphäre zu verletzen. Es heißt: „Ein Bild sagt mehr als tausend Worte, aber als ich Ihres sah, war es mehr, als Worte erklären könnten.“ Das charmante Profil ist unwiderstehlich, obwohl es eine kleine persönliche Nachricht ist, aber Ihr Aussehen verrät viel über eine nette Person ... Also musste ich der charmanten Person mit diesem tollen Profil eine Nachricht hinterlassen. Ich glaube, es ist die Neugier, die mich in einer solchen Zeit zu Ihnen führt. Ich muss noch einmal sagen, dass es mir leid tut, wenn das Schreiben an Sie Ihrer moralischen Ethik widerspricht. Ich möchte dich einfach besser kennenlernen und ein Freund sein oder mehr. Ich hoffe, irgendwann von Ihnen zu hören.

1 year

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Hallo

by marine

Hallo, es tut mir so leid, Ihre Privatsphäre zu verletzen. Es heißt: „Ein Bild sagt mehr als tausend Worte, aber als ich Ihres sah, war es mehr, als Worte erklären könnten.“ Das charmante Profil ist unwiderstehlich, obwohl es eine kleine persönliche Nachricht ist, aber Ihr Aussehen verrät viel über eine nette Person ... Also musste ich der charmanten Person mit diesem tollen Profil eine Nachricht hinterlassen. Ich glaube, es ist die Neugier, die mich in einer solchen Zeit zu Ihnen führt. Ich muss noch einmal sagen, dass es mir leid tut, wenn das Schreiben an Sie Ihrer moralischen Ethik widerspricht. Ich möchte dich einfach besser kennenlernen und ein Freund sein oder mehr. Ich hoffe, irgendwann von Ihnen zu hören.

1 year

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[PATCH net 0/8] selftests: mptcp: skip tests not supported by old kernels (part 1)

by Matthieu Baerts

After a few years of increasing test coverage in the MPTCP selftests, we realised [1] the last version of the selftests is supposed to run on old kernels without issues. Supporting older versions is not that easy for this MPTCP case: these selftests are often validating the internals by checking packets that are exchanged, when some MIB counters are incremented after some actions, how connections are getting opened and closed in some cases, etc. In other words, it is not limited to the socket interface between the userspace and the kernelspace. In addition, the current selftests run a lot of different sub-tests but the TAP13 protocol used in the selftests don't support sub-tests: in other words, one failure in sub-tests implies that the whole selftest is seen as failed at the end because sub-tests are not tracked. It is then important to skip sub-tests not supported by old kernels. To minimise the modifications and reduce the complexity to support old versions, the idea is to look at external signs and skip the whole selftests or just some sub-tests before starting them. This first part focuses on marking the different selftests as skipped if MPTCP is not even supported. That's what is done in patches 2 to 8. Patch 2/8 introduces a new file (mptcp_lib.sh) to be able to re-use some helpers in the different selftests. The first MPTCP selftest has been introduced in v5.6. Patch 1/8 is a bit different but still linked: it modifies mptcp_join.sh selftest not to use 'cmp --bytes' which is not supported by the BusyBox implementation. It is apparently quite common to use BusyBox in CI environments. This tool is needed for a subtest introduced in v6.1. Link: https://lore.kernel.org/stable/CA+G9fYtDGpgT4dckXD-y-N92nqUxuvue_7AtDdBcHrb… [1] Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368 Signed-off-by: Matthieu Baerts <matthieu.baerts(a)tessares.net> --- Matthieu Baerts (8): selftests: mptcp: join: avoid using 'cmp --bytes' selftests: mptcp: connect: skip if MPTCP is not supported selftests: mptcp: pm nl: skip if MPTCP is not supported selftests: mptcp: join: skip if MPTCP is not supported selftests: mptcp: diag: skip if MPTCP is not supported selftests: mptcp: simult flows: skip if MPTCP is not supported selftests: mptcp: sockopt: skip if MPTCP is not supported selftests: mptcp: userspace pm: skip if MPTCP is not supported tools/testing/selftests/net/mptcp/Makefile | 2 +- tools/testing/selftests/net/mptcp/diag.sh | 4 +++ tools/testing/selftests/net/mptcp/mptcp_connect.sh | 4 +++ tools/testing/selftests/net/mptcp/mptcp_join.sh | 17 +++++++-- tools/testing/selftests/net/mptcp/mptcp_lib.sh | 40 ++++++++++++++++++++++ tools/testing/selftests/net/mptcp/mptcp_sockopt.sh | 4 +++ tools/testing/selftests/net/mptcp/pm_netlink.sh | 4 +++ tools/testing/selftests/net/mptcp/simult_flows.sh | 4 +++ tools/testing/selftests/net/mptcp/userspace_pm.sh | 4 +++ 9 files changed, 80 insertions(+), 3 deletions(-) --- base-commit: 9b9e46aa07273ceb96866b2e812b46f1ee0b8d2f change-id: 20230528-upstream-net-20230528-mptcp-selftests-support-old-kernels-part-1-305638f4dbc0 Best regards, -- Matthieu Baerts <matthieu.baerts(a)tessares.net>

1 year

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[PATCH AUTOSEL 6.2 08/30] selftests/bpf: check that modifier resolves after pointer

by Sasha Levin

From: Lorenz Bauer <lorenz.bauer(a)isovalent.com> [ Upstream commit dfdd608c3b365f0fd49d7e13911ebcde06b9865b ] Add a regression test that ensures that a VAR pointing at a modifier which follows a PTR (or STRUCT or ARRAY) is resolved correctly by the datasec validator. Signed-off-by: Lorenz Bauer <lmb(a)isovalent.com> Link: https://lore.kernel.org/r/20230306112138.155352-3-lmb@isovalent.com Signed-off-by: Martin KaFai Lau <martin.lau(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/prog_tests/btf.c | 28 ++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/btf.c b/tools/testing/selftests/bpf/prog_tests/btf.c index de1b5b9eb93a8..d8d1292e73b53 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf.c +++ b/tools/testing/selftests/bpf/prog_tests/btf.c @@ -879,6 +879,34 @@ static struct btf_raw_test raw_tests[] = { .btf_load_err = true, .err_str = "Invalid elem", }, +{ + .descr = "var after datasec, ptr followed by modifier", + .raw_types = { + /* .bss section */ /* [1] */ + BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_DATASEC, 0, 2), + sizeof(void*)+4), + BTF_VAR_SECINFO_ENC(4, 0, sizeof(void*)), + BTF_VAR_SECINFO_ENC(6, sizeof(void*), 4), + /* int */ /* [2] */ + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), + /* int* */ /* [3] */ + BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 2), + BTF_VAR_ENC(NAME_TBD, 3, 0), /* [4] */ + /* const int */ /* [5] */ + BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 2), + BTF_VAR_ENC(NAME_TBD, 5, 0), /* [6] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0b\0c\0", + .str_sec_size = sizeof("\0a\0b\0c\0"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = ".bss", + .key_size = sizeof(int), + .value_size = sizeof(void*)+4, + .key_type_id = 0, + .value_type_id = 1, + .max_entries = 1, +}, /* Test member exceeds the size of struct. * * struct A { -- 2.39.2

1 year

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Re: [PATCH] selftests/input: Introduce basic tests for evdev ioctls

by Enric Balletbo Serra

Again, without html format. Sorry for the noise. Hi Peter, Many thanks for taking a look at this and for the review comments. > Missatge de Peter Hutterer <peter.hutterer(a)redhat.com> del dia dt., 30 de maig 2023 a les 7:56: > > > > Hi Enric, > > > > On 26/5/23 18:22, eballetbo(a)kernel.org wrote: > > > From: Enric Balletbo i Serra <eballetbo(a)kernel.org> > > > > > > This provides a basic infrastructure for the creation of tests for the evdev > > > interface. Most of this is code is adapted from the libevdev wrapper > > > library. While most of evdev ioctls are covered and tested using > > > libevdev tests there are some evdev ioctls that aren't because are not > > > supported (and will not be supported) by libevdev. So, adding, at least > > > those tests, would make sense. > > > > for the archives: libevdev doesn't support setting EV_REP because it's > > inherently racy - one libevdev context to set those values via the ioctl > > would cause all other libevdev contexts on the same device to be out of > > sync. Since we do not get notifications when the values changed, > > libevdev's buffered values for EV_REP will remain whatever they were > > initially. > > > > The only way around that would be setting it via udev on plug, but that > > udev doesnt need/want the libevdev dependency. > > > > plus, afaik most or all libevdev's users ignore kernel key repeats anyway :) > > > > > > > > The test creates an uinput device (and an evdev device) so you can > > > call the wanted ioctl from userspace. So, to run those tests you need > > > to have support for uinput and evdev as well. > > > > > > Signed-off-by: Enric Balletbo i Serra <eballetbo(a)kernel.org> > > > --- > > > tools/testing/selftests/Makefile | 1 + > > > tools/testing/selftests/input/.gitignore | 2 + > > > tools/testing/selftests/input/Makefile | 5 + > > > tools/testing/selftests/input/config | 3 + > > > tools/testing/selftests/input/evioc-test.c | 282 +++++++++++++++++++++ > > > 5 files changed, 293 insertions(+) > > > create mode 100644 tools/testing/selftests/input/.gitignore > > > create mode 100644 tools/testing/selftests/input/Makefile > > > create mode 100644 tools/testing/selftests/input/config > > > create mode 100644 tools/testing/selftests/input/evioc-test.c > > > > > > diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile > > > index 90a62cf75008..29fc77168aa7 100644 > > > --- a/tools/testing/selftests/Makefile > > > +++ b/tools/testing/selftests/Makefile > > > @@ -28,6 +28,7 @@ TARGETS += futex > > > TARGETS += gpio > > > TARGETS += hid > > > TARGETS += intel_pstate > > > +TARGETS += input > > > TARGETS += iommu > > > TARGETS += ipc > > > TARGETS += ir > > > diff --git a/tools/testing/selftests/input/.gitignore b/tools/testing/selftests/input/.gitignore > > > new file mode 100644 > > > index 000000000000..37f5dff3255b > > > --- /dev/null > > > +++ b/tools/testing/selftests/input/.gitignore > > > @@ -0,0 +1,2 @@ > > > +# SPDX-License-Identifier: GPL-2.0 > > > +evioc-test > > > diff --git a/tools/testing/selftests/input/Makefile b/tools/testing/selftests/input/Makefile > > > new file mode 100644 > > > index 000000000000..031729be0628 > > > --- /dev/null > > > +++ b/tools/testing/selftests/input/Makefile > > > @@ -0,0 +1,5 @@ > > > +# SPDX-License-Identifier: GPL-2.0 > > > +CFLAGS += -D_GNU_SOURCE -std=gnu99 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES) > > > + > > > +TEST_GEN_PROGS := evioc-test > > > +include ../lib.mk > > > diff --git a/tools/testing/selftests/input/config b/tools/testing/selftests/input/config > > > new file mode 100644 > > > index 000000000000..b7512f3e6d8d > > > --- /dev/null > > > +++ b/tools/testing/selftests/input/config > > > @@ -0,0 +1,3 @@ > > > +CONFIG_INPUT=y > > > +CONFIG_INPUT_EVDEV=y > > > +CONFIG_INPUT_UINPUT=m > > > diff --git a/tools/testing/selftests/input/evioc-test.c b/tools/testing/selftests/input/evioc-test.c > > > new file mode 100644 > > > index 000000000000..4c0c8ebed378 > > > --- /dev/null > > > +++ b/tools/testing/selftests/input/evioc-test.c > > > @@ -0,0 +1,282 @@ > > > +// SPDX-License-Identifier: MIT > > > +/* > > > + * Copyright © 2023 Red Hat, Inc. > > > + * > > > + * Part of the code in this file is inspired and copied from the libevdev wrapper library > > > + * for evdev devices written by Peter Hutterer. > > > + */ > > > + > > > +#include <dirent.h> > > > +#include <errno.h> > > > +#include <fcntl.h> > > > +#include <linux/uinput.h> > > > +#include <poll.h> > > > +#include <stdio.h> > > > +#include <stdlib.h> > > > +#include <string.h> > > > +#include <sys/stat.h> > > > +#include <time.h> > > > +#include <unistd.h> > > > + > > > +#include "../kselftest_harness.h" > > > + > > > +#define TEST_DEVICE_NAME "selftest input device" > > > + > > > +struct selftest_uinput { > > > + int uinput_fd; /** file descriptor to uinput */ > > > + int evdev_fd; /** file descriptor to evdev */ > > > + char *name; /** device name */ > > > + char *syspath; /** /sys path */ > > > + char *devnode; /** device node */ > > > +}; > > > + > > > +static int is_event_device(const struct dirent *dent) > > > +{ > > > + return strncmp("event", dent->d_name, 5) == 0; > > > +} > > > + > > > +static char *fetch_device_node(const char *path) > > > +{ > > > + struct dirent **namelist; > > > + char *devnode = NULL; > > > + int ndev, i; > > > + > > > + ndev = scandir(path, &namelist, is_event_device, alphasort); > > > + if (ndev <= 0) > > > + return NULL; > > > + > > > + /* ndev should only ever be 1 */ > > > + > > > + for (i = 0; i < ndev; i++) { > > > + if (!devnode && asprintf(&devnode, "/dev/input/%s", > > > + namelist[i]->d_name) == -1) > > > + devnode = NULL; > > > + free(namelist[i]); > > > + } > > > + > > > + free(namelist); > > > + > > > + return devnode; > > > +} > > > + > > > +static int is_input_device(const struct dirent *dent) > > > +{ > > > + return strncmp("input", dent->d_name, 5) == 0; > > > +} > > > + > > > +/* > > > + * Device node is guessed based on the sysfs path, the sysfs path contains a > > > + * eventN file, that corresponds to our /dev/input/eventN number. > > > + */ > > > +static int fetch_syspath_and_devnode(struct selftest_uinput *uidev) > > > +{ > > > +#define SYS_INPUT_DIR "/sys/devices/virtual/input/" > > > + struct dirent **namelist; > > > + int ndev, i; > > > + int rc; > > > + char buf[sizeof(SYS_INPUT_DIR) + 64] = SYS_INPUT_DIR; > > > + > > > + rc = ioctl(uidev->uinput_fd, > > > + UI_GET_SYSNAME(sizeof(buf) - strlen(SYS_INPUT_DIR)), > > > + &buf[strlen(SYS_INPUT_DIR)]); > > > + if (rc != -1) { > > > + uidev->syspath = strdup(buf); > > > + uidev->devnode = fetch_device_node(buf); > > > + return 0; > > > + } > > > > It's not obvious in the the code, but the above is pretty much all you > > need. UI_GET_SYSNAME has been around 3.15 and if that fails you might as > > well bail out in this case. All the code below is the fallback that > > pre-dates that ioctl. > > I see now, thanks. So I think we can simplify all this and make the assumption that a recent kernel version will be used, so we can remove the fallback code. > > > + > > > + ndev = scandir(SYS_INPUT_DIR, &namelist, is_input_device, alphasort); > > > + if (ndev <= 0) > > > + return -1; > > > + > > > + for (i = 0; i < ndev; i++) { > > > + int fd, len; > > > + > > > + rc = snprintf(buf, sizeof(buf), "%s%s/name", SYS_INPUT_DIR, > > > + namelist[i]->d_name); > > > + if (rc < 0 || (size_t)rc >= sizeof(buf)) > > > + continue; > > > + > > > + /* created within time frame */ > > > + fd = open(buf, O_RDONLY); > > > + if (fd < 0) > > > + continue; > > > + > > > + len = read(fd, buf, sizeof(buf)); > > > + close(fd); > > > + if (len <= 0) > > > + continue; > > > + > > > + buf[len - 1] = '\0'; /* file contains \n */ > > > + if (strcmp(buf, uidev->name) == 0) { > > > + if (uidev->syspath) { > > > + fprintf(stderr, > > > + "multiple identical devices found. syspath is unreliable\n"); > > > + break; > > > + } > > > + > > > + rc = snprintf(buf, sizeof(buf), "%s%s", SYS_INPUT_DIR, > > > + namelist[i]->d_name); > > > + > > > + if (rc < 0 || (size_t)rc >= sizeof(buf)) { > > > + fprintf(stderr, > > > + "Invalid syspath, syspath is unreliable\n"); > > > + break; > > > + } > > > + > > > + uidev->syspath = strdup(buf); > > > + uidev->devnode = fetch_device_node(buf); > > > + } > > > + } > > > + > > > + for (i = 0; i < ndev; i++) > > > + free(namelist[i]); > > > + free(namelist); > > > + > > > + return uidev->devnode ? 0 : -1; > > > +#undef SYS_INPUT_DIR > > > +} > > > + > > > +void selftest_uinput_destroy(struct selftest_uinput *uidev) > > > +{ > > > + if (!uidev) > > > + return; > > > + > > > + if (uidev->uinput_fd >= 0) > > > + ioctl(uidev->uinput_fd, UI_DEV_DESTROY, NULL); > > > + > > > + close(uidev->evdev_fd); > > > + close(uidev->uinput_fd); > > > + > > > + free(uidev->syspath); > > > + free(uidev->devnode); > > > + free(uidev->name); > > > + free(uidev); > > > +} > > > + > > > +int selftest_uinput_create_device(struct selftest_uinput **uidev, ...) > > > +{ > > > + struct selftest_uinput *new_device; > > > + struct uinput_setup setup; > > > + va_list args; > > > + int rc, fd; > > > + int type; > > > + > > > + new_device = calloc(1, sizeof(struct selftest_uinput)); > > > + if (!new_device) > > > + return -ENOMEM; > > > + > > > + memset(&setup, 0, sizeof(setup)); > > > + strncpy(setup.name, TEST_DEVICE_NAME, UINPUT_MAX_NAME_SIZE - 1); > > > + setup.id.vendor = 0x1234; /* sample vendor */ > > > + setup.id.product = 0x5678; /* sample product */ > > > + setup.id.bustype = BUS_USB; > > > + > > > + fd = open("/dev/uinput", O_WRONLY | O_NONBLOCK); > > > + if (fd < 0) { > > > + fprintf(stderr, "cannot open uinput (%d): %m\n", errno); > > > + goto error; > > > + } > > > + > > > + va_start(args, uidev); > > > + rc = 0; > > > + do { > > > + type = va_arg(args, int); > > > + if (type == -1) > > > + break; > > > + rc = ioctl(fd, UI_SET_EVBIT, type); > > > + } while (rc == 0); > > > + va_end(args); > > > + > > > + rc = ioctl(fd, UI_DEV_SETUP, &setup); > > > + if (rc == -1) > > > + goto error; > > > + > > > + rc = ioctl(fd, UI_DEV_CREATE, NULL); > > > + if (rc == -1) > > > + goto error; > > > + > > > + new_device->name = strdup(TEST_DEVICE_NAME); > > > + new_device->uinput_fd = fd; > > > + > > > + if (fetch_syspath_and_devnode(new_device) == -1) { > > > + fprintf(stderr, "unable to fetch syspath or device node.\n"); > > > + errno = ENODEV; > > > + goto error; > > > + } > > > + > > > + fd = open(new_device->devnode, O_RDONLY); > > > + if (fd < 0) { > > > + fprintf(stderr, "cannot open uinput (%d): %m\n", errno); > > > + goto error; > > > + } > > > + new_device->evdev_fd = fd; > > > + > > > + *uidev = new_device; > > > + > > > + return 0; > > > + > > > +error: > > > + rc = -errno; > > > + selftest_uinput_destroy(new_device); > > > + return rc; > > > +} > > > + > > > +const char *selftest_uinput_get_devnode(struct selftest_uinput *uidev) > > > +{ > > > + return uidev->devnode; > > > +} > > > + > > > +TEST(eviocgname_get_device_name) > > > +{ > > > + struct selftest_uinput *uidev; > > > + char buf[256]; > > > + int rc; > > > + > > > + rc = selftest_uinput_create_device(&uidev); > > > + ASSERT_EQ(0, rc); > > > + ASSERT_NE(NULL, uidev); > > > + > > > + memset(buf, 0, sizeof(buf)); > > > + /* ioctl to get the name */ > > > + rc = ioctl(uidev->evdev_fd, EVIOCGNAME(sizeof(buf) - 1), buf); > > > + ASSERT_GE(rc, 0); > > > + ASSERT_STREQ(TEST_DEVICE_NAME, buf); > > > + > > > + selftest_uinput_destroy(uidev); > > > +} > > > + > > > +TEST(eviocgrep_get_repeat_settings) > > > +{ > > > + struct selftest_uinput *uidev; > > > + int rep_values[2]; > > > + int rc; > > > + > > > + memset(rep_values, 0, sizeof(rep_values)); > > > + > > > + rc = selftest_uinput_create_device(&uidev); > > > + ASSERT_EQ(0, rc); > > > + ASSERT_NE(NULL, uidev); > > > + > > > + /* ioctl to get the repeat rates values */ > > > + rc = ioctl(uidev->evdev_fd, EVIOCSREP, rep_values); > > > > EVIOCSREP *sets* the repeat values My intention was to use EVIOCGREP here instead of 'S', so instead of fixing the comment I'd fix the ioctl. Thanks. > > > > > > > + /* should fail because EV_REP is not set */ > > > + ASSERT_EQ(-1, rc); > > > + > > > + selftest_uinput_destroy(uidev); > > > + > > > + rc = selftest_uinput_create_device(&uidev, EV_REP); > > This needs a -1 terminator, otherwise you're va-argsing into oblivion. > > Right, I'd add in the next version. > > > > > + ASSERT_EQ(0, rc); > > > + ASSERT_NE(NULL, uidev); > > > + > > > + /* ioctl to get the repeat rates values */ > > > + rc = ioctl(uidev->evdev_fd, EVIOCGREP, rep_values); > > > + ASSERT_EQ(0, rc); > > > + /* should get the default delay an period values set by the kernel */ > > > > typo -> "and" > > Fixed in the next version. > > > + ASSERT_EQ(rep_values[0], 250); > > > + ASSERT_EQ(rep_values[1], 33); > > > > So, interestingly enough you don't actually test setting the value here. > > The EV_REP bit is set during device creation and you check the default > > values but you don't call EVIOCSREP to change the values - which AFAIU > > was the initial intention of these tests? > > > Yes, one of the main purposes is to test EVIOC**S**REP, but I skipped and sent a first version only testing the EVIOC**G**REP test to catch feedback from the mailing list. In the next version I'll include both tests, for getting and setting the repeat values (I think it makes sense). Cheers, Enric > > > Cheers, > > PEter > > > > > + > > > + selftest_uinput_destroy(uidev); > > > +} > > > + > > > +TEST_HARNESS_MAIN

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[PATCH 00/13] tools/nolibc: riscv: Add full rv32 support

by Zhangjin Wu

Hi, Willy Thanks very mush for your kindly review, discuss and suggestion, now we get full rv32 support ;-) In the first series [1], we have fixed up the compile errors about _start and __NR_llseek for rv32, but left compile errors about tons of time32 syscalls (removed after kernel commit d4c08b9776b3 ("riscv: Use latest system call ABI")) and the missing fstat in nolibc-test.c [2], now we have fixed up all of them. Introduction ============ This series is based on the 20230524-nolibc-rv32+stkp4 branch of [3], it includes 3 parts, they work together to add full rv32 support: * Reverts two old out-of-day patches * Revert "tools/nolibc: riscv: Support __NR_llseek for rv32" * Revert "selftests/nolibc: Fix up compile error for rv32" (these two and the reverted ones: * commit 606343b7478c ("selftests/nolibc: Fix up compile error for rv32") * commit d2c3acba6d66 ("tools/nolibc: riscv: Support __NR_llseek for rv32") can be removed from the git repo completely, there are two new ones to replace them) * Compile and test support patches * selftests/nolibc: print name instead of number for EOVERFLOW * selftests/nolibc: syscall_args: use __NR_statx for rv32 * --> replace the old one 606343b7478, use statx instead of read * selftests/nolibc: riscv: customize makefile for rv32 * selftests/nolibc: allow specify a bios for qemu * selftests/nolibc: remove the duplicated gettimeofday_bad2 * Fix up some missing syscalls, mainly time32 syscalls * tools/nolibc: sys_lseek: riscv: use __NR_llseek for rv32 * --> replace the old one d2c3acba6d66, cleaned up * tools/nolibc: sys_poll: riscv: use __NR_ppoll_time64 for rv32 * tools/nolibc: ppoll/ppoll_time64: Add a missing argument * tools/nolibc: sys_select: riscv: use __NR_pselect6_time64 for rv32 * tools/nolibc: sys_wait4: riscv: use __NR_waitid for rv32 * tools/nolibc: sys_gettimeofday: riscv: use __NR_clock_gettime64 for rv32 Compile ======= For rv64: $ make ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu- nolibc-test $ file nolibc-test nolibc-test: ELF 64-bit LSB executable, UCB RISC-V ... $ make ARCH=riscv64 CROSS_COMPILE=riscv64-linux-gnu- nolibc-test $ file nolibc-test nolibc-test: ELF 64-bit LSB executable, UCB RISC-V ... For rv32: $ make ARCH=riscv CONFIG_32BIT=1 CROSS_COMPILE=riscv64-linux-gnu- nolibc-test $ file nolibc-test nolibc-test: ELF 32-bit LSB executable, UCB RISC-V ... $ make ARCH=riscv32 CROSS_COMPILE=riscv64-linux-gnu- nolibc-test $ file nolibc-test nolibc-test: ELF 32-bit LSB executable, UCB RISC-V ... Testing ======= Environment: // gcc toolchain $ riscv64-linux-gnu-gcc --version riscv64-linux-gnu-gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0 Copyright (C) 2019 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. // glibc >= 2.33 required, for older glibc, must upgrade include/bits/wordsize.h $ dpkg -l | grep libc6-dev | grep riscv ii libc6-dev-riscv64-cross 2.31-0ubuntu7cross1 // glibc include/bits/wordsize.h: manually upgraded to >= 2.33 // without this, can not build tools/testing/selftests/nolibc/nolibc-test.c $ cat /usr/riscv64-linux-gnu/include/bits/wordsize.h #if __riscv_xlen == (__SIZEOF_POINTER__ * 8) # define __WORDSIZE __riscv_xlen #else # error unsupported ABI #endif # define __WORDSIZE_TIME64_COMPAT32 1 #if __WORDSIZE == 32 # define __WORDSIZE32_SIZE_ULONG 0 # define __WORDSIZE32_PTRDIFF_LONG 0 #endif // higher qemu version is better, latest version is v8.0.0+ $ qemu-system-riscv64 --version QEMU emulator version 4.2.1 (Debian 1:4.2-3ubuntu6.18) Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers // opensbi version, higher is better, must match kernel version and qemu version // rv64: used version is 1.2, latest is 1.2 $ head -2 /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc/run.out | tail -1 OpenSBI v1.2-116-g7919530 // rv32: used version is v0.9, latest is 1.2 $ head -2 /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc/run.out | tail -1 OpenSBI v0.9-152-g754d511 For rv64: $ pwd /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc $ make ARCH=riscv64 CROSS_COMPILE=riscv64-linux-gnu- defconfig $ make ARCH=riscv64 CROSS_COMPILE=riscv64-linux-gnu- BIOS=/labs/linux-lab/boards/riscv64/virt/bsp/bios/opensbi/generic/fw_jump.elf run MKDIR sysroot/riscv/include make[1]: Entering directory '/labs/linux-lab/src/linux-stable/tools/include/nolibc' make[2]: Entering directory '/labs/linux-lab/src/linux-stable' make[2]: Leaving directory '/labs/linux-lab/src/linux-stable' make[2]: Entering directory '/labs/linux-lab/src/linux-stable' INSTALL /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc/sysroot/sysroot/include make[2]: Leaving directory '/labs/linux-lab/src/linux-stable' make[1]: Leaving directory '/labs/linux-lab/src/linux-stable/tools/include/nolibc' CC nolibc-test MKDIR initramfs INSTALL initramfs/init make[1]: Entering directory '/labs/linux-lab/src/linux-stable' ... LD vmlinux NM System.map SORTTAB vmlinux OBJCOPY arch/riscv/boot/Image Kernel: arch/riscv/boot/Image is ready make[1]: Leaving directory '/labs/linux-lab/src/linux-stable' 135 test(s) passed. $ file ../../../../vmlinux ../../../../vmlinux: ELF 64-bit LSB executable, UCB RISC-V, version 1 (SYSV), statically linked, BuildID[sha1]=b8e1cea5122b04bce540b4022f0d6f171ffe615a, not stripped For rv32: $ pwd /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc $ make ARCH=riscv32 CROSS_COMPILE=riscv64-linux-gnu- defconfig $ make ARCH=riscv32 CROSS_COMPILE=riscv64-linux-gnu- BIOS=/labs/linux-lab/boards/riscv32/virt/bsp/bios/opensbi/generic/fw_jump.elf run MKDIR sysroot/riscv/include make[1]: Entering directory '/labs/linux-lab/src/linux-stable/tools/include/nolibc' make[2]: Entering directory '/labs/linux-lab/src/linux-stable' make[2]: Leaving directory '/labs/linux-lab/src/linux-stable' make[2]: Entering directory '/labs/linux-lab/src/linux-stable' INSTALL /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc/sysroot/sysroot/include make[2]: Leaving directory '/labs/linux-lab/src/linux-stable' make[1]: Leaving directory '/labs/linux-lab/src/linux-stable/tools/include/nolibc' CC nolibc-test MKDIR initramfs INSTALL initramfs/init make[1]: Entering directory '/labs/linux-lab/src/linux-stable' CALL scripts/checksyscalls.sh GEN usr/initramfs_data.cpio COPY usr/initramfs_inc_data AS usr/initramfs_data.o AR usr/built-in.a GEN security/selinux/flask.h security/selinux/av_permissions.h CC security/selinux/avc.o CC security/selinux/hooks.o CC security/selinux/selinuxfs.o CC security/selinux/nlmsgtab.o CC security/selinux/netif.o CC security/selinux/netnode.o CC security/selinux/netport.o CC security/selinux/status.o CC security/selinux/ss/services.o AR security/selinux/built-in.a AR security/built-in.a AR built-in.a AR vmlinux.a LD vmlinux.o OBJCOPY modules.builtin.modinfo GEN modules.builtin MODPOST vmlinux.symvers UPD include/generated/utsversion.h CC init/version-timestamp.o LD .tmp_vmlinux.kallsyms1 NM .tmp_vmlinux.kallsyms1.syms KSYMS .tmp_vmlinux.kallsyms1.S AS .tmp_vmlinux.kallsyms1.S LD .tmp_vmlinux.kallsyms2 NM .tmp_vmlinux.kallsyms2.syms KSYMS .tmp_vmlinux.kallsyms2.S AS .tmp_vmlinux.kallsyms2.S LD vmlinux NM System.map SORTTAB vmlinux OBJCOPY arch/riscv/boot/Image Kernel: arch/riscv/boot/Image is ready make[1]: Leaving directory '/labs/linux-lab/src/linux-stable' 135 test(s) passed. $ file ../../../../vmlinux ../../../../vmlinux: ELF 32-bit LSB executable, UCB RISC-V, version 1 (SYSV), statically linked, BuildID[sha1]=bad4c1f3899f47355d2a2010bade56972fd94b9d, not stripped The full rv64 testing result (run.out) is uploaded at [4]. The full rv32 testing result (run.out) is uploaded at [5]. That's all, thanks! Best regards, Zhangjin Wu --- [1]: https://lore.kernel.org/linux-riscv/20230520143154.68663-1-falcon@tinylab.o… [2]: https://lore.kernel.org/linux-riscv/20230520135235.68155-1-falcon@tinylab.o… [3]: https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git [4]: https://pastebin.com/3L0nV78u [5]: https://pastebin.com/RadrXdta Zhangjin Wu (13): Revert "tools/nolibc: riscv: Support __NR_llseek for rv32" Revert "selftests/nolibc: Fix up compile error for rv32" selftests/nolibc: print name instead of number for EOVERFLOW selftests/nolibc: syscall_args: use __NR_statx for rv32 selftests/nolibc: riscv: customize makefile for rv32 selftests/nolibc: allow specify a bios for qemu selftests/nolibc: remove the duplicated gettimeofday_bad2 tools/nolibc: sys_lseek: riscv: use __NR_llseek for rv32 tools/nolibc: sys_poll: riscv: use __NR_ppoll_time64 for rv32 tools/nolibc: ppoll/ppoll_time64: Add a missing argument tools/nolibc: sys_select: riscv: use __NR_pselect6_time64 for rv32 tools/nolibc: sys_wait4: riscv: use __NR_waitid for rv32 tools/nolibc: sys_gettimeofday: riscv: use __NR_clock_gettime64 for rv32 tools/include/nolibc/std.h | 1 + tools/include/nolibc/sys.h | 135 +++++++++++++++++-- tools/include/nolibc/types.h | 21 ++- tools/testing/selftests/nolibc/Makefile | 14 +- tools/testing/selftests/nolibc/nolibc-test.c | 15 ++- 5 files changed, 167 insertions(+), 19 deletions(-) -- 2.25.1

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[PATCH v1 0/6] Memory Mapping (VMA) protection using PKU - set 1

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)google.com> This is the first set of Memory mapping (VMA) protection patches using PKU. * * * Background: As discussed previously in the kernel mailing list [1], V8 CFI [2] uses PKU to protect memory, and Stephen Röttger proposes to extend the PKU to memory mapping [3]. We're using PKU for in-process isolation to enforce control-flow integrity for a JIT compiler. In our threat model, an attacker exploits a vulnerability and has arbitrary read/write access to the whole process space concurrently to other threads being executed. This attacker can manipulate some arguments to syscalls from some threads. Under such a powerful attack, we want to create a “safe/isolated” thread environment. We assign dedicated PKUs to this thread, and use those PKUs to protect the threads’ runtime environment. The thread has exclusive access to its run-time memory. This includes modifying the protection of the memory mapping, or munmap the memory mapping after use. And the other threads won’t be able to access the memory or modify the memory mapping (VMA) belonging to the thread. * * * Proposed changes: This patch introduces a new flag, PKEY_ENFORCE_API, to the pkey_alloc() function. When a PKEY is created with this flag, it is enforced that any thread that wants to make changes to the memory mapping (such as mprotect) of the memory must have write access to the PKEY. PKEYs created without this flag will continue to work as they do now, for backwards compatibility. Only PKEY created from user space can have the new flag set, the PKEY allocated by the kernel internally will not have it. In other words, ARCH_DEFAULT_PKEY(0) and execute_only_pkey won’t have this flag set, and continue work as today. This flag is checked only at syscall entry, such as mprotect/munmap in this set of patches. It will not apply to other call paths. In other words, if the kernel want to change attributes of VMA for some reasons, the kernel is free to do that and not affected by this new flag. This set of patch covers mprotect/munmap, I plan to work on other syscalls after this. * * * Testing: I have tested this patch on a Linux kernel 5.15, 6,1, and 6.4-rc1, new selftest is added in: pkey_enforce_api.c * * * Discussion: We believe that this patch provides a valuable security feature. It allows us to create “safe/isolated” thread environments that are protected from attackers with arbitrary read/write access to the process space. We believe that the interface change and the patch don't introduce backwards compatibility risk. We would like to disucss this patch in Linux kernel community for feedback and support. * * * Reference: [1]https://lore.kernel.org/all/202208221331.71C50A6F@keescook/ [2]https://docs.google.com/document/d/1O2jwK4dxI3nRcOJuPYkonhTkNQfbmwdvxQMyX… [3]https://docs.google.com/document/d/1qqVoVfRiF2nRylL3yjZyCQvzQaej1HRPh3f5w… * * * Current status: There are on-going discussion related to threat model, io_uring, we will continue discuss using v0 thread. * * * PATCH history: v1: update code related review comments: mprotect.c: remove syscall from do_mprotect_pkey() remove pr_warn_ratelimited munmap.c: change syscall to enum caller_origin remove pr_warn_ratelimited v0: https://lore.kernel.org/linux-mm/20230515130553.2311248-1-jeffxu@chromium.o… Best Regards, -Jeff Xu Jeff Xu (6): PKEY: Introduce PKEY_ENFORCE_API flag PKEY: Add arch_check_pkey_enforce_api() PKEY: Apply PKEY_ENFORCE_API to mprotect PKEY:selftest pkey_enforce_api for mprotect PKEY: Apply PKEY_ENFORCE_API to munmap PKEY:selftest pkey_enforce_api for munmap arch/powerpc/include/asm/pkeys.h | 19 +- arch/x86/include/asm/mmu.h | 7 + arch/x86/include/asm/pkeys.h | 92 +- arch/x86/mm/pkeys.c | 2 +- include/linux/mm.h | 8 +- include/linux/pkeys.h | 18 +- include/uapi/linux/mman.h | 5 + mm/mmap.c | 31 +- mm/mprotect.c | 17 +- mm/mremap.c | 6 +- tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/pkey_enforce_api.c | 1312 +++++++++++++++++ 12 files changed, 1499 insertions(+), 19 deletions(-) create mode 100644 tools/testing/selftests/mm/pkey_enforce_api.c base-commit: ba0ad6ed89fd5dada3b7b65ef2b08e95d449d4ab -- 2.40.1.606.ga4b1b128d6-goog

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Linux-kselftest-mirror May 2023