February 2022 - Linux-kselftest-mirror

[PATCH] pidfd: fix test failure due to stack overflow on some arches

by Axel Rasmussen

When running the pidfd_fdinfo_test on arm64, it fails for me. After some digging, the reason is that the child exits due to SIGBUS, because it overflows the 1024 byte stack we've reserved for it. To fix the issue, increase the stack size to 8192 bytes (this number is somewhat arbitrary, and was arrived at through experimentation -- I kept doubling until the failure no longer occurred). Also, let's make the issue easier to debug. wait_for_pid() returns an ambiguous value: it may return -1 in all of these cases: 1. waitpid() itself returned -1 2. waitpid() returned success, but we found !WIFEXITED(status). 3. The child process exited, but it did so with a -1 exit code. There's no way for the caller to tell the difference. So, at least log which occurred, so the test runner can debug things. While debugging this, I found that we had !WIFEXITED(), because the child exited due to a signal. This seems like a reasonably common case, so also print out whether or not we have WIFSIGNALED(), and the associated WTERMSIG() (if any). This lets us see the SIGBUS I'm fixing clearly when it occurs. Finally, I'm suspicious of allocating the child's stack on our stack. man clone(2) suggests that the correct way to do this is with mmap(), and in particular by setting MAP_STACK. So, switch to doing it that way instead. Signed-off-by: Axel Rasmussen <axelrasmussen(a)google.com> --- tools/testing/selftests/pidfd/pidfd.h | 13 ++++++++--- .../selftests/pidfd/pidfd_fdinfo_test.c | 22 +++++++++++++++---- 2 files changed, 28 insertions(+), 7 deletions(-) diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h index 01f8d3c0cf2c..6922d6417e1c 100644 --- a/tools/testing/selftests/pidfd/pidfd.h +++ b/tools/testing/selftests/pidfd/pidfd.h @@ -68,7 +68,7 @@ #define PIDFD_SKIP 3 #define PIDFD_XFAIL 4 -int wait_for_pid(pid_t pid) +static inline int wait_for_pid(pid_t pid) { int status, ret; @@ -78,13 +78,20 @@ int wait_for_pid(pid_t pid) if (errno == EINTR) goto again; + ksft_print_msg("waitpid returned -1, errno=%d\n", errno); return -1; } - if (!WIFEXITED(status)) + if (!WIFEXITED(status)) { + ksft_print_msg( + "waitpid !WIFEXITED, WIFSIGNALED=%d, WTERMSIG=%d\n", + WIFSIGNALED(status), WTERMSIG(status)); return -1; + } - return WEXITSTATUS(status); + ret = WEXITSTATUS(status); + ksft_print_msg("waitpid WEXITSTATUS=%d\n", ret); + return ret; } static inline int sys_pidfd_open(pid_t pid, unsigned int flags) diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c index 22558524f71c..3fd8e903118f 100644 --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c @@ -12,6 +12,7 @@ #include <string.h> #include <syscall.h> #include <sys/wait.h> +#include <sys/mman.h> #include "pidfd.h" #include "../kselftest.h" @@ -80,7 +81,10 @@ static inline int error_check(struct error *err, const char *test_name) return err->code; } +#define CHILD_STACK_SIZE 8192 + struct child { + char *stack; pid_t pid; int fd; }; @@ -89,17 +93,22 @@ static struct child clone_newns(int (*fn)(void *), void *args, struct error *err) { static int flags = CLONE_PIDFD | CLONE_NEWPID | CLONE_NEWNS | SIGCHLD; - size_t stack_size = 1024; - char *stack[1024] = { 0 }; struct child ret; if (!(flags & CLONE_NEWUSER) && geteuid() != 0) flags |= CLONE_NEWUSER; + ret.stack = mmap(NULL, CHILD_STACK_SIZE, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0); + if (ret.stack == MAP_FAILED) { + error_set(err, -1, "mmap of stack failed (errno %d)", errno); + return ret; + } + #ifdef __ia64__ - ret.pid = __clone2(fn, stack, stack_size, flags, args, &ret.fd); + ret.pid = __clone2(fn, ret.stack, CHILD_STACK_SIZE, flags, args, &ret.fd); #else - ret.pid = clone(fn, stack + stack_size, flags, args, &ret.fd); + ret.pid = clone(fn, ret.stack + CHILD_STACK_SIZE, flags, args, &ret.fd); #endif if (ret.pid < 0) { @@ -129,6 +138,11 @@ static inline int child_join(struct child *child, struct error *err) else if (r > 0) error_set(err, r, "child %d reported: %d", child->pid, r); + if (munmap(child->stack, CHILD_STACK_SIZE)) { + error_set(err, -1, "munmap of child stack failed (errno %d)", errno); + r = -1; + } + return r; } -- 2.35.0.rc2.247.g8bbb082509-goog

2 years, 2 months

3
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[PATCH v2 1/2] kselftest: alsa: Check for event generation when we write to controls

by Mark Brown

Add some coverage of event generation to mixer-test. Rather than doing a separate set of writes designed to trigger events we add a step to the existing write_and_verify() which checks to see if the value we read back from non-volatile controls matches the value before writing and that an event is or isn't generated as appropriate. The "tests" for events then simply check that no spurious or missing events were detected. This avoids needing further logic to generate appropriate values for each control type and maximises coverage. When checking for events we use a timeout of 0. This relies on the kernel generating any event prior to returning to userspace when setting a control. That is currently the case and it is difficult to see it changing, if it does the test will need to be updated. Using a delay of 0 means that we don't slow things down unduly when checking for no event or when events fail to be generated. We don't check behaviour for volatile controls since we can't tell what the behaviour is supposed to be for any given control. Signed-off-by: Mark Brown <broonie(a)kernel.org> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> --- v2: - Get the numid from the API rather than using the control index. tools/testing/selftests/alsa/mixer-test.c | 148 +++++++++++++++++++++- 1 file changed, 145 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/alsa/mixer-test.c b/tools/testing/selftests/alsa/mixer-test.c index 0e88f4f3d802..79ffbca429ee 100644 --- a/tools/testing/selftests/alsa/mixer-test.c +++ b/tools/testing/selftests/alsa/mixer-test.c @@ -3,7 +3,7 @@ // kselftest for the ALSA mixer API // // Original author: Mark Brown <broonie(a)kernel.org> -// Copyright (c) 2021 Arm Limited +// Copyright (c) 2021-2 Arm Limited // This test will iterate over all cards detected in the system, exercising // every mixer control it can find. This may conflict with other system @@ -27,11 +27,12 @@ #include "../kselftest.h" -#define TESTS_PER_CONTROL 4 +#define TESTS_PER_CONTROL 6 struct card_data { snd_ctl_t *handle; int card; + struct pollfd pollfd; int num_ctls; snd_ctl_elem_list_t *ctls; struct card_data *next; @@ -43,6 +44,8 @@ struct ctl_data { snd_ctl_elem_info_t *info; snd_ctl_elem_value_t *def_val; int elem; + int event_missing; + int event_spurious; struct card_data *card; struct ctl_data *next; }; @@ -149,6 +152,7 @@ void find_controls(void) if (!ctl_data) ksft_exit_fail_msg("Out of memory\n"); + memset(ctl_data, 0, sizeof(*ctl_data)); ctl_data->card = card_data; ctl_data->elem = ctl; ctl_data->name = snd_ctl_elem_list_get_name(card_data->ctls, @@ -184,6 +188,26 @@ void find_controls(void) ctl_list = ctl_data; } + /* Set up for events */ + err = snd_ctl_subscribe_events(card_data->handle, true); + if (err < 0) { + ksft_exit_fail_msg("snd_ctl_subscribe_events() failed for card %d: %d\n", + card, err); + } + + err = snd_ctl_poll_descriptors_count(card_data->handle); + if (err != 1) { + ksft_exit_fail_msg("Unexpected desciptor count %d for card %d\n", + err, card); + } + + err = snd_ctl_poll_descriptors(card_data->handle, + &card_data->pollfd, 1); + if (err != 1) { + ksft_exit_fail_msg("snd_ctl_poll_descriptors() failed for %d\n", + card, err); + } + next_card: if (snd_card_next(&card) < 0) { ksft_print_msg("snd_card_next"); @@ -194,6 +218,73 @@ void find_controls(void) snd_config_delete(config); } +/* + * Block for up to timeout ms for an event, returns a negative value + * on error, 0 for no event and 1 for an event. + */ +int wait_for_event(struct ctl_data *ctl, int timeout) +{ + unsigned short revents; + snd_ctl_event_t *event; + int count, err; + unsigned int mask = 0; + unsigned int ev_id; + + snd_ctl_event_alloca(&event); + + do { + err = poll(&(ctl->card->pollfd), 1, timeout); + if (err < 0) { + ksft_print_msg("poll() failed for %s: %s (%d)\n", + ctl->name, strerror(errno), errno); + return -1; + } + /* Timeout */ + if (err == 0) + return 0; + + err = snd_ctl_poll_descriptors_revents(ctl->card->handle, + &(ctl->card->pollfd), + 1, &revents); + if (err < 0) { + ksft_print_msg("snd_ctl_poll_desciptors_revents() failed for %s: %d\n", + ctl->name, err); + return err; + } + if (revents & POLLERR) { + ksft_print_msg("snd_ctl_poll_desciptors_revents() reported POLLERR for %s\n", + ctl->name); + return -1; + } + /* No read events */ + if (!(revents & POLLIN)) { + ksft_print_msg("No POLLIN\n"); + continue; + } + + err = snd_ctl_read(ctl->card->handle, event); + if (err < 0) { + ksft_print_msg("snd_ctl_read() failed for %s: %d\n", + ctl->name, err); + return err; + } + + if (snd_ctl_event_get_type(event) != SND_CTL_EVENT_ELEM) + continue; + + /* The ID returned from the event is 1 less than numid */ + mask = snd_ctl_event_elem_get_mask(event); + ev_id = snd_ctl_event_elem_get_numid(event); + if (ev_id != snd_ctl_elem_info_get_numid(ctl->info)) { + ksft_print_msg("Event for unexpected ctl %s\n", + snd_ctl_event_elem_get_name(event)); + continue; + } + } while ((mask & SND_CTL_EVENT_MASK_VALUE) != SND_CTL_EVENT_MASK_VALUE); + + return 1; +} + bool ctl_value_index_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val, int index) { @@ -428,7 +519,8 @@ int write_and_verify(struct ctl_data *ctl, { int err, i; bool error_expected, mismatch_shown; - snd_ctl_elem_value_t *read_val, *w_val; + snd_ctl_elem_value_t *initial_val, *read_val, *w_val; + snd_ctl_elem_value_alloca(&initial_val); snd_ctl_elem_value_alloca(&read_val); snd_ctl_elem_value_alloca(&w_val); @@ -446,6 +538,18 @@ int write_and_verify(struct ctl_data *ctl, snd_ctl_elem_value_copy(expected_val, write_val); } + /* Store the value before we write */ + if (snd_ctl_elem_info_is_readable(ctl->info)) { + snd_ctl_elem_value_set_id(initial_val, ctl->id); + + err = snd_ctl_elem_read(ctl->card->handle, initial_val); + if (err < 0) { + ksft_print_msg("snd_ctl_elem_read() failed: %s\n", + snd_strerror(err)); + return err; + } + } + /* * Do the write, if we have an expected value ignore the error * and carry on to validate the expected value. @@ -470,6 +574,30 @@ int write_and_verify(struct ctl_data *ctl, return err; } + /* + * Check for an event if the value changed, or confirm that + * there was none if it didn't. We rely on the kernel + * generating the notification before it returns from the + * write, this is currently true, should that ever change this + * will most likely break and need updating. + */ + if (!snd_ctl_elem_info_is_volatile(ctl->info)) { + err = wait_for_event(ctl, 0); + if (snd_ctl_elem_value_compare(initial_val, read_val)) { + if (err < 1) { + ksft_print_msg("No event generated for %s\n", + ctl->name); + ctl->event_missing++; + } + } else { + if (err != 0) { + ksft_print_msg("Spurious event generated for %s\n", + ctl->name); + ctl->event_spurious++; + } + } + } + /* * Use the libray to compare values, if there's a mismatch * carry on and try to provide a more useful diagnostic than @@ -898,6 +1026,18 @@ void test_ctl_write_invalid(struct ctl_data *ctl) ctl->card->card, ctl->elem); } +void test_ctl_event_missing(struct ctl_data *ctl) +{ + ksft_test_result(!ctl->event_missing, "event_missing.%d.%d\n", + ctl->card->card, ctl->elem); +} + +void test_ctl_event_spurious(struct ctl_data *ctl) +{ + ksft_test_result(!ctl->event_spurious, "event_spurious.%d.%d\n", + ctl->card->card, ctl->elem); +} + int main(void) { struct ctl_data *ctl; @@ -917,6 +1057,8 @@ int main(void) test_ctl_write_default(ctl); test_ctl_write_valid(ctl); test_ctl_write_invalid(ctl); + test_ctl_event_missing(ctl); + test_ctl_event_spurious(ctl); } ksft_exit_pass(); -- 2.30.2

2 years, 2 months

2
3
0 0

[PATCH] kselftest: alsa: Check for event generation when we write to controls

by Mark Brown

Add some coverage of event generation to mixer-test. Rather than doing a separate set of writes designed to trigger events we add a step to the existing write_and_verify() which checks to see if the value we read back from non-volatile controls matches the value before writing and that an event is or isn't generated as appropriate. The "tests" for events then simply check that no spurious or missing events were detected. This avoids needing further logic to generate appropriate values for each control type and maximises coverage. When checking for events we use a timeout of 0. This relies on the kernel generating any event prior to returning to userspace when setting a control. That is currently the case and it is difficult to see it changing, if it does the test will need to be updated. Using a delay of 0 means that we don't slow things down unduly when checking for no event or when events fail to be generated. We don't check behaviour for volatile controls since we can't tell what the behaviour is supposed to be for any given control. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/alsa/mixer-test.c | 148 +++++++++++++++++++++- 1 file changed, 145 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/alsa/mixer-test.c b/tools/testing/selftests/alsa/mixer-test.c index 0e88f4f3d802..42cf3b724586 100644 --- a/tools/testing/selftests/alsa/mixer-test.c +++ b/tools/testing/selftests/alsa/mixer-test.c @@ -3,7 +3,7 @@ // kselftest for the ALSA mixer API // // Original author: Mark Brown <broonie(a)kernel.org> -// Copyright (c) 2021 Arm Limited +// Copyright (c) 2021-2 Arm Limited // This test will iterate over all cards detected in the system, exercising // every mixer control it can find. This may conflict with other system @@ -27,11 +27,12 @@ #include "../kselftest.h" -#define TESTS_PER_CONTROL 4 +#define TESTS_PER_CONTROL 6 struct card_data { snd_ctl_t *handle; int card; + struct pollfd pollfd; int num_ctls; snd_ctl_elem_list_t *ctls; struct card_data *next; @@ -43,6 +44,8 @@ struct ctl_data { snd_ctl_elem_info_t *info; snd_ctl_elem_value_t *def_val; int elem; + int event_missing; + int event_spurious; struct card_data *card; struct ctl_data *next; }; @@ -149,6 +152,7 @@ void find_controls(void) if (!ctl_data) ksft_exit_fail_msg("Out of memory\n"); + memset(ctl_data, 0, sizeof(*ctl_data)); ctl_data->card = card_data; ctl_data->elem = ctl; ctl_data->name = snd_ctl_elem_list_get_name(card_data->ctls, @@ -184,6 +188,26 @@ void find_controls(void) ctl_list = ctl_data; } + /* Set up for events */ + err = snd_ctl_subscribe_events(card_data->handle, true); + if (err < 0) { + ksft_exit_fail_msg("snd_ctl_subscribe_events() failed for card %d: %d\n", + card, err); + } + + err = snd_ctl_poll_descriptors_count(card_data->handle); + if (err != 1) { + ksft_exit_fail_msg("Unexpected desciptor count %d for card %d\n", + err, card); + } + + err = snd_ctl_poll_descriptors(card_data->handle, + &card_data->pollfd, 1); + if (err != 1) { + ksft_exit_fail_msg("snd_ctl_poll_descriptors() failed for %d\n", + card, err); + } + next_card: if (snd_card_next(&card) < 0) { ksft_print_msg("snd_card_next"); @@ -194,6 +218,73 @@ void find_controls(void) snd_config_delete(config); } +/* + * Block for up to timeout ms for an event, returns a negative value + * on error, 0 for no event and 1 for an event. + */ +int wait_for_event(struct ctl_data *ctl, int timeout) +{ + unsigned short revents; + snd_ctl_event_t *event; + int count, err; + unsigned int mask = 0; + unsigned int ev_id; + + snd_ctl_event_alloca(&event); + + do { + err = poll(&(ctl->card->pollfd), 1, timeout); + if (err < 0) { + ksft_print_msg("poll() failed for %s: %s (%d)\n", + ctl->name, strerror(errno), errno); + return -1; + } + /* Timeout */ + if (err == 0) + return 0; + + err = snd_ctl_poll_descriptors_revents(ctl->card->handle, + &(ctl->card->pollfd), + 1, &revents); + if (err < 0) { + ksft_print_msg("snd_ctl_poll_desciptors_revents() failed for %s: %d\n", + ctl->name, err); + return err; + } + if (revents & POLLERR) { + ksft_print_msg("snd_ctl_poll_desciptors_revents() reported POLLERR for %s\n", + ctl->name); + return -1; + } + /* No read events */ + if (!(revents & POLLIN)) { + ksft_print_msg("No POLLIN\n"); + continue; + } + + err = snd_ctl_read(ctl->card->handle, event); + if (err < 0) { + ksft_print_msg("snd_ctl_read() failed for %s: %d\n", + ctl->name, err); + return err; + } + + if (snd_ctl_event_get_type(event) != SND_CTL_EVENT_ELEM) + continue; + + /* The ID returned from the event is 1 less than numid */ + mask = snd_ctl_event_elem_get_mask(event); + ev_id = snd_ctl_event_elem_get_numid(event); + if (ev_id != ctl->elem + 1) { + ksft_print_msg("Event for unexpected ctl %s\n", + snd_ctl_event_elem_get_name(event)); + continue; + } + } while ((mask & SND_CTL_EVENT_MASK_VALUE) != SND_CTL_EVENT_MASK_VALUE); + + return 1; +} + bool ctl_value_index_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val, int index) { @@ -428,7 +519,8 @@ int write_and_verify(struct ctl_data *ctl, { int err, i; bool error_expected, mismatch_shown; - snd_ctl_elem_value_t *read_val, *w_val; + snd_ctl_elem_value_t *initial_val, *read_val, *w_val; + snd_ctl_elem_value_alloca(&initial_val); snd_ctl_elem_value_alloca(&read_val); snd_ctl_elem_value_alloca(&w_val); @@ -446,6 +538,18 @@ int write_and_verify(struct ctl_data *ctl, snd_ctl_elem_value_copy(expected_val, write_val); } + /* Store the value before we write */ + if (snd_ctl_elem_info_is_readable(ctl->info)) { + snd_ctl_elem_value_set_id(initial_val, ctl->id); + + err = snd_ctl_elem_read(ctl->card->handle, initial_val); + if (err < 0) { + ksft_print_msg("snd_ctl_elem_read() failed: %s\n", + snd_strerror(err)); + return err; + } + } + /* * Do the write, if we have an expected value ignore the error * and carry on to validate the expected value. @@ -470,6 +574,30 @@ int write_and_verify(struct ctl_data *ctl, return err; } + /* + * Check for an event if the value changed, or confirm that + * there was none if it didn't. We rely on the kernel + * generating the notification before it returns from the + * write, this is currently true, should that ever change this + * will most likely break and need updating. + */ + if (!snd_ctl_elem_info_is_volatile(ctl->info)) { + err = wait_for_event(ctl, 0); + if (snd_ctl_elem_value_compare(initial_val, read_val)) { + if (err < 1) { + ksft_print_msg("No event generated for %s\n", + ctl->name); + ctl->event_missing++; + } + } else { + if (err != 0) { + ksft_print_msg("Spurious event generated for %s\n", + ctl->name); + ctl->event_spurious++; + } + } + } + /* * Use the libray to compare values, if there's a mismatch * carry on and try to provide a more useful diagnostic than @@ -898,6 +1026,18 @@ void test_ctl_write_invalid(struct ctl_data *ctl) ctl->card->card, ctl->elem); } +void test_ctl_event_missing(struct ctl_data *ctl) +{ + ksft_test_result(!ctl->event_missing, "event_missing.%d.%d\n", + ctl->card->card, ctl->elem); +} + +void test_ctl_event_spurious(struct ctl_data *ctl) +{ + ksft_test_result(!ctl->event_spurious, "event_spurious.%d.%d\n", + ctl->card->card, ctl->elem); +} + int main(void) { struct ctl_data *ctl; @@ -917,6 +1057,8 @@ int main(void) test_ctl_write_default(ctl); test_ctl_write_valid(ctl); test_ctl_write_invalid(ctl); + test_ctl_event_missing(ctl); + test_ctl_event_spurious(ctl); } ksft_exit_pass(); -- 2.30.2

2 years, 2 months

3
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Prezentacja

by Mateusz Talaga

Dzień dobry! Czy mógłbym przedstawić rozwiązanie, które umożliwia monitoring każdego auta w czasie rzeczywistym w tym jego pozycję, zużycie paliwa i przebieg? Dodatkowo nasze narzędzie minimalizuje koszty utrzymania samochodów, skraca czas przejazdów, a także tworzenie planu tras czy dostaw. Z naszej wiedzy i doświadczenia korzysta już ponad 49 tys. Klientów. Monitorujemy 809 000 pojazdów na całym świecie, co jest naszą najlepszą wizytówką. Bardzo proszę o e-maila zwrotnego, jeśli moglibyśmy wspólnie omówić potencjał wykorzystania takiego rozwiązania w Państwa firmie. Z poważaniem, Mateusz Talaga

2 years, 2 months

1
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[PATCH] kselftest/vm: Revert "tools/testing/selftests/vm/userfaultfd.c: use swap() to make code cleaner"

by Shuah Khan

With this change, userfaultfd fails to build with undefined reference swap() error: userfaultfd.c: In function ‘userfaultfd_stress’: userfaultfd.c:1530:17: warning: implicit declaration of function ‘swap’; did you mean ‘swab’? [-Wimplicit-function-declaration] 1530 | swap(area_src, area_dst); | ^~~~ | swab /usr/bin/ld: /tmp/ccDGOAdV.o: in function `userfaultfd_stress': userfaultfd.c:(.text+0x549e): undefined reference to `swap' /usr/bin/ld: userfaultfd.c:(.text+0x54bc): undefined reference to `swap' collect2: error: ld returned 1 exit status Revert the commit to fix the problem. Fixes: 2c769ed7137a ("tools/testing/selftests/vm/userfaultfd.c: use swap() to make code cleaner") Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> --- tools/testing/selftests/vm/userfaultfd.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index d3fd24f9fae8..2f49c9af1b58 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -1417,6 +1417,7 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize) static int userfaultfd_stress(void) { void *area; + char *tmp_area; unsigned long nr; struct uffdio_register uffdio_register; struct uffd_stats uffd_stats[nr_cpus]; @@ -1527,9 +1528,13 @@ static int userfaultfd_stress(void) count_verify[nr], nr); /* prepare next bounce */ - swap(area_src, area_dst); + tmp_area = area_src; + area_src = area_dst; + area_dst = tmp_area; - swap(area_src_alias, area_dst_alias); + tmp_area = area_src_alias; + area_src_alias = area_dst_alias; + area_dst_alias = tmp_area; uffd_stats_report(uffd_stats, nr_cpus); } -- 2.32.0

2 years, 2 months

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[PATCH] kselftest: alsa: Declare most functions static

by Mark Brown

This program has only one file so most functions can be static. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- This depends on my previously posted patch adding coverage of events: https://lore.kernel.org/all/20220201151551.21497-1-broonie@kernel.org/ tools/testing/selftests/alsa/mixer-test.c | 58 ++++++++++++----------- 1 file changed, 30 insertions(+), 28 deletions(-) diff --git a/tools/testing/selftests/alsa/mixer-test.c b/tools/testing/selftests/alsa/mixer-test.c index 42cf3b724586..8faae89b7b48 100644 --- a/tools/testing/selftests/alsa/mixer-test.c +++ b/tools/testing/selftests/alsa/mixer-test.c @@ -71,7 +71,8 @@ struct ctl_data *ctl_list = NULL; #endif #ifndef LIB_HAS_LOAD_STRING -int snd_config_load_string(snd_config_t **config, const char *s, size_t size) +static int snd_config_load_string(snd_config_t **config, const char *s, + size_t size) { snd_input_t *input; snd_config_t *dst; @@ -99,7 +100,7 @@ int snd_config_load_string(snd_config_t **config, const char *s, size_t size) } #endif -void find_controls(void) +static void find_controls(void) { char name[32]; int card, ctl, err; @@ -222,7 +223,7 @@ void find_controls(void) * Block for up to timeout ms for an event, returns a negative value * on error, 0 for no event and 1 for an event. */ -int wait_for_event(struct ctl_data *ctl, int timeout) +static int wait_for_event(struct ctl_data *ctl, int timeout) { unsigned short revents; snd_ctl_event_t *event; @@ -285,8 +286,9 @@ int wait_for_event(struct ctl_data *ctl, int timeout) return 1; } -bool ctl_value_index_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val, - int index) +static bool ctl_value_index_valid(struct ctl_data *ctl, + snd_ctl_elem_value_t *val, + int index) { long int_val; long long int64_val; @@ -397,7 +399,7 @@ bool ctl_value_index_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val, * Check that the provided value meets the constraints for the * provided control. */ -bool ctl_value_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val) +static bool ctl_value_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val) { int i; bool valid = true; @@ -413,7 +415,7 @@ bool ctl_value_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val) * Check that we can read the default value and it is valid. Write * tests use the read value to restore the default. */ -void test_ctl_get_value(struct ctl_data *ctl) +static void test_ctl_get_value(struct ctl_data *ctl) { int err; @@ -448,9 +450,9 @@ void test_ctl_get_value(struct ctl_data *ctl) ctl->card->card, ctl->elem); } -bool show_mismatch(struct ctl_data *ctl, int index, - snd_ctl_elem_value_t *read_val, - snd_ctl_elem_value_t *expected_val) +static bool show_mismatch(struct ctl_data *ctl, int index, + snd_ctl_elem_value_t *read_val, + snd_ctl_elem_value_t *expected_val) { long long expected_int, read_int; @@ -513,9 +515,9 @@ bool show_mismatch(struct ctl_data *ctl, int index, * the write to fail, for verifying that invalid writes don't corrupt * anything. */ -int write_and_verify(struct ctl_data *ctl, - snd_ctl_elem_value_t *write_val, - snd_ctl_elem_value_t *expected_val) +static int write_and_verify(struct ctl_data *ctl, + snd_ctl_elem_value_t *write_val, + snd_ctl_elem_value_t *expected_val) { int err, i; bool error_expected, mismatch_shown; @@ -622,7 +624,7 @@ int write_and_verify(struct ctl_data *ctl, * Make sure we can write the default value back to the control, this * should validate that at least some write works. */ -void test_ctl_write_default(struct ctl_data *ctl) +static void test_ctl_write_default(struct ctl_data *ctl) { int err; @@ -655,7 +657,7 @@ void test_ctl_write_default(struct ctl_data *ctl) ctl->card->card, ctl->elem); } -bool test_ctl_write_valid_boolean(struct ctl_data *ctl) +static bool test_ctl_write_valid_boolean(struct ctl_data *ctl) { int err, i, j; bool fail = false; @@ -676,7 +678,7 @@ bool test_ctl_write_valid_boolean(struct ctl_data *ctl) return !fail; } -bool test_ctl_write_valid_integer(struct ctl_data *ctl) +static bool test_ctl_write_valid_integer(struct ctl_data *ctl) { int err; int i; @@ -706,7 +708,7 @@ bool test_ctl_write_valid_integer(struct ctl_data *ctl) return !fail; } -bool test_ctl_write_valid_integer64(struct ctl_data *ctl) +static bool test_ctl_write_valid_integer64(struct ctl_data *ctl) { int err, i; long long j, step; @@ -734,7 +736,7 @@ bool test_ctl_write_valid_integer64(struct ctl_data *ctl) return !fail; } -bool test_ctl_write_valid_enumerated(struct ctl_data *ctl) +static bool test_ctl_write_valid_enumerated(struct ctl_data *ctl) { int err, i, j; bool fail = false; @@ -755,7 +757,7 @@ bool test_ctl_write_valid_enumerated(struct ctl_data *ctl) return !fail; } -void test_ctl_write_valid(struct ctl_data *ctl) +static void test_ctl_write_valid(struct ctl_data *ctl) { bool pass; int err; @@ -808,8 +810,8 @@ void test_ctl_write_valid(struct ctl_data *ctl) ctl->card->card, ctl->elem); } -bool test_ctl_write_invalid_value(struct ctl_data *ctl, - snd_ctl_elem_value_t *val) +static bool test_ctl_write_invalid_value(struct ctl_data *ctl, + snd_ctl_elem_value_t *val) { int err; long val_read; @@ -830,7 +832,7 @@ bool test_ctl_write_invalid_value(struct ctl_data *ctl, return !ctl_value_valid(ctl, val); } -bool test_ctl_write_invalid_boolean(struct ctl_data *ctl) +static bool test_ctl_write_invalid_boolean(struct ctl_data *ctl) { int err, i; long val_read; @@ -849,7 +851,7 @@ bool test_ctl_write_invalid_boolean(struct ctl_data *ctl) return !fail; } -bool test_ctl_write_invalid_integer(struct ctl_data *ctl) +static bool test_ctl_write_invalid_integer(struct ctl_data *ctl) { int i; bool fail = false; @@ -895,7 +897,7 @@ bool test_ctl_write_invalid_integer(struct ctl_data *ctl) return !fail; } -bool test_ctl_write_invalid_integer64(struct ctl_data *ctl) +static bool test_ctl_write_invalid_integer64(struct ctl_data *ctl) { int i; bool fail = false; @@ -941,7 +943,7 @@ bool test_ctl_write_invalid_integer64(struct ctl_data *ctl) return !fail; } -bool test_ctl_write_invalid_enumerated(struct ctl_data *ctl) +static bool test_ctl_write_invalid_enumerated(struct ctl_data *ctl) { int err, i; unsigned int val_read; @@ -973,7 +975,7 @@ bool test_ctl_write_invalid_enumerated(struct ctl_data *ctl) } -void test_ctl_write_invalid(struct ctl_data *ctl) +static void test_ctl_write_invalid(struct ctl_data *ctl) { bool pass; int err; @@ -1026,13 +1028,13 @@ void test_ctl_write_invalid(struct ctl_data *ctl) ctl->card->card, ctl->elem); } -void test_ctl_event_missing(struct ctl_data *ctl) +static void test_ctl_event_missing(struct ctl_data *ctl) { ksft_test_result(!ctl->event_missing, "event_missing.%d.%d\n", ctl->card->card, ctl->elem); } -void test_ctl_event_spurious(struct ctl_data *ctl) +static void test_ctl_event_spurious(struct ctl_data *ctl) { ksft_test_result(!ctl->event_spurious, "event_spurious.%d.%d\n", ctl->card->card, ctl->elem); -- 2.30.2

2 years, 2 months

2
1
0 0

[PATCH net-next 0/4] selftests: fib rule: Small internal and test output improvments

by Guillaume Nault

The first half of these patch set improves the code logic and has no user visible effect. The second half improves the script output, to make it clearer and nicer to read. Guillaume Nault (4): selftests: fib rule: Make 'getmatch' and 'match' local variables selftests: fib rule: Drop erroneous TABLE variable selftests: fib rule: Log test description selftests: fib rule: Don't echo modified sysctls tools/testing/selftests/net/fib_rule_tests.sh | 26 ++++++++++++------- 1 file changed, 17 insertions(+), 9 deletions(-) -- 2.21.3

2 years, 2 months

2
5
0 0

[PATCH] selftests: kselftest framework: Provide "finished" helper

by Kees Cook

Instead of having each time that wants to use ksft_exit() have to figure out the internals of kselftest.h, add the helper ksft_finished() that makes sure the passes, xfails, and skips are equal to the test plan count. Cc: Shuah Khan <shuah(a)kernel.org> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-mm(a)kvack.org Signed-off-by: Kees Cook <keescook(a)chromium.org> --- tools/testing/selftests/kselftest.h | 10 ++++++++++ tools/testing/selftests/vm/memfd_secret.c | 2 +- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h index f1180987492c..b8f248018174 100644 --- a/tools/testing/selftests/kselftest.h +++ b/tools/testing/selftests/kselftest.h @@ -28,6 +28,7 @@ * * When all tests are finished, clean up and exit the program with one of: * + * ksft_finished(); * ksft_exit(condition); * ksft_exit_pass(); * ksft_exit_fail(); @@ -235,6 +236,15 @@ static inline int ksft_exit_fail(void) ksft_exit_fail(); \ } while (0) +/** + * ksft_finished() - Exit selftest with success if all tests passed + */ +#define ksft_finished() \ + ksft_exit(ksft_plan == \ + ksft_cnt.ksft_pass + \ + ksft_cnt.ksft_xfail + \ + ksft_cnt.ksft_xskip) + static inline int ksft_exit_fail_msg(const char *msg, ...) { int saved_errno = errno; diff --git a/tools/testing/selftests/vm/memfd_secret.c b/tools/testing/selftests/vm/memfd_secret.c index 93e7e7ffed33..957b9e18c729 100644 --- a/tools/testing/selftests/vm/memfd_secret.c +++ b/tools/testing/selftests/vm/memfd_secret.c @@ -282,7 +282,7 @@ int main(int argc, char *argv[]) close(fd); - ksft_exit(!ksft_get_fail_cnt()); + ksft_finished(); } #else /* __NR_memfd_secret */ -- 2.30.2

2 years, 2 months

1
0
0 0

[PATCH] selftests/exec: Test for empty string on NULL argv

by Kees Cook

Test for the NULL argv argument producing a single empty string on exec. Cc: Eric Biederman <ebiederm(a)xmission.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Yang Yingliang <yangyingliang(a)huawei.com> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: linux-kselftest(a)vger.kernel.org Signed-off-by: Kees Cook <keescook(a)chromium.org> --- This is testing for this patch: https://lore.kernel.org/linux-hardening/20220201000947.2453721-1-keescook@c… --- tools/testing/selftests/exec/Makefile | 1 + tools/testing/selftests/exec/null-argv.c | 78 ++++++++++++++++++++++++ 2 files changed, 79 insertions(+) create mode 100644 tools/testing/selftests/exec/null-argv.c diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile index dd61118df66e..4832cd8f4f9c 100644 --- a/tools/testing/selftests/exec/Makefile +++ b/tools/testing/selftests/exec/Makefile @@ -10,6 +10,7 @@ TEST_GEN_FILES := execveat.symlink execveat.denatured script subdir pipe TEST_FILES := Makefile TEST_GEN_PROGS += recursion-depth +TEST_GEN_PROGS += null-argv EXTRA_CLEAN := $(OUTPUT)/subdir.moved $(OUTPUT)/execveat.moved $(OUTPUT)/xxxxx* \ $(OUTPUT)/S_I*.test diff --git a/tools/testing/selftests/exec/null-argv.c b/tools/testing/selftests/exec/null-argv.c new file mode 100644 index 000000000000..c19726e710d1 --- /dev/null +++ b/tools/testing/selftests/exec/null-argv.c @@ -0,0 +1,78 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Test that empty argvs are swapped out for a single empty string. */ +#include <stdio.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/wait.h> + +#include "../kselftest.h" + +#define FORK(exec) \ +do { \ + pid = fork(); \ + if (pid == 0) { \ + /* Child */ \ + exec; /* Some kind of exec */ \ + perror("# " #exec); \ + return 1; \ + } \ + check_result(pid, #exec); \ +} while (0) + +void check_result(pid_t pid, const char *msg) +{ + int wstatus; + + if (pid == (pid_t)-1) { + perror("# fork"); + ksft_test_result_fail("fork failed: %s\n", msg); + return; + } + if (waitpid(pid, &wstatus, 0) < 0) { + perror("# waitpid"); + ksft_test_result_fail("waitpid failed: %s\n", msg); + return; + } + if (!WIFEXITED(wstatus)) { + ksft_test_result_fail("child did not exit: %s\n", msg); + return; + } + if (WEXITSTATUS(wstatus) != 0) { + ksft_test_result_fail("non-zero exit: %s\n", msg); + return; + } + ksft_test_result_pass("%s\n", msg); +} + +int main(int argc, char *argv[], char *envp[]) +{ + pid_t pid; + static char * const args[] = { NULL }; + static char * const str[] = { "", NULL }; + + /* argc counting checks */ + if (argc < 1) { + fprintf(stderr, "# FAIL: saw argc == 0 (old kernel?)\n"); + return 1; + } + if (argc != 1) { + fprintf(stderr, "# FAIL: unknown argc (%d)\n", argc); + return 1; + } + if (argv[0][0] == '\0') { + /* Good, we found a NULL terminated string at argv[0]! */ + return 0; + } + + /* Test runner. */ + ksft_print_header(); + ksft_set_plan(5); + + FORK(execve(argv[0], str, NULL)); + FORK(execve(argv[0], NULL, NULL)); + FORK(execve(argv[0], NULL, envp)); + FORK(execve(argv[0], args, NULL)); + FORK(execve(argv[0], args, envp)); + + ksft_exit(ksft_cnt.ksft_pass == ksft_plan); +} -- 2.30.2

2 years, 2 months

1
0
0 0

[PATCH] userfaultfd/selftests: use swap() to make code cleaner

by cgel.zte＠gmail.com

From: Changcheng Deng <deng.changcheng(a)zte.com.cn> Use swap() in order to make code cleaner. Issue found by coccinelle. Reported-by: Zeal Robot <zealci(a)zte.com.cn> Signed-off-by: Changcheng Deng <deng.changcheng(a)zte.com.cn> --- tools/testing/selftests/vm/userfaultfd.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index 8a09057d2f22..41dfe6f4ebfb 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -1413,7 +1413,6 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize) static int userfaultfd_stress(void) { void *area; - char *tmp_area; unsigned long nr; struct uffdio_register uffdio_register; struct uffd_stats uffd_stats[nr_cpus]; @@ -1524,13 +1523,8 @@ static int userfaultfd_stress(void) count_verify[nr], nr); /* prepare next bounce */ - tmp_area = area_src; - area_src = area_dst; - area_dst = tmp_area; - - tmp_area = area_src_alias; - area_src_alias = area_dst_alias; - area_dst_alias = tmp_area; + swap(area_src, area_dst); + swap(area_src_alias, area_dst_alias); uffd_stats_report(uffd_stats, nr_cpus); } -- 2.25.1

2 years, 2 months

3
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Linux-kselftest-mirror February 2022