diff options
Diffstat (limited to 'tools/testing/selftests')
31 files changed, 1088 insertions, 63 deletions
diff --git a/tools/testing/selftests/breakpoints/.gitignore b/tools/testing/selftests/breakpoints/.gitignore index 9b3193d06608..a23bb4a6f06c 100644 --- a/tools/testing/selftests/breakpoints/.gitignore +++ b/tools/testing/selftests/breakpoints/.gitignore @@ -1 +1,2 @@ breakpoint_test +step_after_suspend_test diff --git a/tools/testing/selftests/breakpoints/Makefile b/tools/testing/selftests/breakpoints/Makefile index c0d957015f52..74e533fd4bc5 100644 --- a/tools/testing/selftests/breakpoints/Makefile +++ b/tools/testing/selftests/breakpoints/Makefile @@ -6,9 +6,11 @@ ifeq ($(ARCH),x86) TEST_PROGS := breakpoint_test endif +TEST_PROGS += step_after_suspend_test + all: $(TEST_PROGS) include ../lib.mk clean: - rm -fr breakpoint_test + rm -fr breakpoint_test step_after_suspend_test diff --git a/tools/testing/selftests/breakpoints/step_after_suspend_test.c b/tools/testing/selftests/breakpoints/step_after_suspend_test.c new file mode 100644 index 000000000000..60b8a95dac26 --- /dev/null +++ b/tools/testing/selftests/breakpoints/step_after_suspend_test.c @@ -0,0 +1,218 @@ +/* + * Copyright (C) 2016 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#define _GNU_SOURCE + +#include <errno.h> +#include <fcntl.h> +#include <sched.h> +#include <signal.h> +#include <stdbool.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <sys/ptrace.h> +#include <sys/stat.h> +#include <sys/timerfd.h> +#include <sys/types.h> +#include <sys/wait.h> + +#include "../kselftest.h" + +void child(int cpu) +{ + cpu_set_t set; + + CPU_ZERO(&set); + CPU_SET(cpu, &set); + if (sched_setaffinity(0, sizeof(set), &set) != 0) { + perror("sched_setaffinity() failed"); + _exit(1); + } + + if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) != 0) { + perror("ptrace(PTRACE_TRACEME) failed"); + _exit(1); + } + + if (raise(SIGSTOP) != 0) { + perror("raise(SIGSTOP) failed"); + _exit(1); + } + + _exit(0); +} + +bool run_test(int cpu) +{ + int status; + pid_t pid = fork(); + pid_t wpid; + + if (pid < 0) { + perror("fork() failed"); + return false; + } + if (pid == 0) + child(cpu); + + wpid = waitpid(pid, &status, __WALL); + if (wpid != pid) { + perror("waitpid() failed"); + return false; + } + if (!WIFSTOPPED(status)) { + printf("child did not stop\n"); + return false; + } + if (WSTOPSIG(status) != SIGSTOP) { + printf("child did not stop with SIGSTOP\n"); + return false; + } + + if (ptrace(PTRACE_SINGLESTEP, pid, NULL, NULL) < 0) { + if (errno == EIO) { + printf("ptrace(PTRACE_SINGLESTEP) not supported on this architecture\n"); + ksft_exit_skip(); + } + perror("ptrace(PTRACE_SINGLESTEP) failed"); + return false; + } + + wpid = waitpid(pid, &status, __WALL); + if (wpid != pid) { + perror("waitpid() failed"); + return false; + } + if (WIFEXITED(status)) { + printf("child did not single-step\n"); + return false; + } + if (!WIFSTOPPED(status)) { + printf("child did not stop\n"); + return false; + } + if (WSTOPSIG(status) != SIGTRAP) { + printf("child did not stop with SIGTRAP\n"); + return false; + } + + if (ptrace(PTRACE_CONT, pid, NULL, NULL) < 0) { + perror("ptrace(PTRACE_CONT) failed"); + return false; + } + + wpid = waitpid(pid, &status, __WALL); + if (wpid != pid) { + perror("waitpid() failed"); + return false; + } + if (!WIFEXITED(status)) { + printf("child did not exit after PTRACE_CONT\n"); + return false; + } + + return true; +} + +void suspend(void) +{ + int power_state_fd; + struct sigevent event = {}; + int timerfd; + int err; + struct itimerspec spec = {}; + + power_state_fd = open("/sys/power/state", O_RDWR); + if (power_state_fd < 0) { + perror("open(\"/sys/power/state\") failed (is this test running as root?)"); + ksft_exit_fail(); + } + + timerfd = timerfd_create(CLOCK_BOOTTIME_ALARM, 0); + if (timerfd < 0) { + perror("timerfd_create() failed"); + ksft_exit_fail(); + } + + spec.it_value.tv_sec = 5; + err = timerfd_settime(timerfd, 0, &spec, NULL); + if (err < 0) { + perror("timerfd_settime() failed"); + ksft_exit_fail(); + } + + if (write(power_state_fd, "mem", strlen("mem")) != strlen("mem")) { + perror("entering suspend failed"); + ksft_exit_fail(); + } + + close(timerfd); + close(power_state_fd); +} + +int main(int argc, char **argv) +{ + int opt; + bool do_suspend = true; + bool succeeded = true; + cpu_set_t available_cpus; + int err; + int cpu; + + while ((opt = getopt(argc, argv, "n")) != -1) { + switch (opt) { + case 'n': + do_suspend = false; + break; + default: + printf("Usage: %s [-n]\n", argv[0]); + printf(" -n: do not trigger a suspend/resume cycle before the test\n"); + return -1; + } + } + + if (do_suspend) + suspend(); + + err = sched_getaffinity(0, sizeof(available_cpus), &available_cpus); + if (err < 0) { + perror("sched_getaffinity() failed"); + ksft_exit_fail(); + } + + for (cpu = 0; cpu < CPU_SETSIZE; cpu++) { + bool test_success; + + if (!CPU_ISSET(cpu, &available_cpus)) + continue; + + test_success = run_test(cpu); + printf("CPU %d: ", cpu); + if (test_success) { + printf("[OK]\n"); + ksft_inc_pass_cnt(); + } else { + printf("[FAILED]\n"); + ksft_inc_fail_cnt(); + succeeded = false; + } + } + + ksft_print_cnts(); + if (succeeded) + ksft_exit_pass(); + else + ksft_exit_fail(); +} diff --git a/tools/testing/selftests/cpu-hotplug/config b/tools/testing/selftests/cpu-hotplug/config new file mode 100644 index 000000000000..e6ab090cfbf3 --- /dev/null +++ b/tools/testing/selftests/cpu-hotplug/config @@ -0,0 +1,2 @@ +CONFIG_NOTIFIER_ERROR_INJECTION=y +CONFIG_CPU_NOTIFIER_ERROR_INJECT=m diff --git a/tools/testing/selftests/efivarfs/efivarfs.sh b/tools/testing/selftests/efivarfs/efivarfs.sh index 77edcdcc016b..057278448515 100755 --- a/tools/testing/selftests/efivarfs/efivarfs.sh +++ b/tools/testing/selftests/efivarfs/efivarfs.sh @@ -88,7 +88,11 @@ test_delete() exit 1 fi - rm $file + rm $file 2>/dev/null + if [ $? -ne 0 ]; then + chattr -i $file + rm $file + fi if [ -e $file ]; then echo "$file couldn't be deleted" >&2 @@ -111,6 +115,7 @@ test_zero_size_delete() exit 1 fi + chattr -i $file printf "$attrs" > $file if [ -e $file ]; then @@ -141,7 +146,11 @@ test_valid_filenames() echo "$file could not be created" >&2 ret=1 else - rm $file + rm $file 2>/dev/null + if [ $? -ne 0 ]; then + chattr -i $file + rm $file + fi fi done @@ -174,7 +183,11 @@ test_invalid_filenames() if [ -e $file ]; then echo "Creating $file should have failed" >&2 - rm $file + rm $file 2>/dev/null + if [ $? -ne 0 ]; then + chattr -i $file + rm $file + fi ret=1 fi done diff --git a/tools/testing/selftests/efivarfs/open-unlink.c b/tools/testing/selftests/efivarfs/open-unlink.c index 8c0764407b3c..4af74f733036 100644 --- a/tools/testing/selftests/efivarfs/open-unlink.c +++ b/tools/testing/selftests/efivarfs/open-unlink.c @@ -1,10 +1,68 @@ +#include <errno.h> #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <unistd.h> +#include <sys/ioctl.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> +#include <linux/fs.h> + +static int set_immutable(const char *path, int immutable) +{ + unsigned int flags; + int fd; + int rc; + int error; + + fd = open(path, O_RDONLY); + if (fd < 0) + return fd; + + rc = ioctl(fd, FS_IOC_GETFLAGS, &flags); + if (rc < 0) { + error = errno; + close(fd); + errno = error; + return rc; + } + + if (immutable) + flags |= FS_IMMUTABLE_FL; + else + flags &= ~FS_IMMUTABLE_FL; + + rc = ioctl(fd, FS_IOC_SETFLAGS, &flags); + error = errno; + close(fd); + errno = error; + return rc; +} + +static int get_immutable(const char *path) +{ + unsigned int flags; + int fd; + int rc; + int error; + + fd = open(path, O_RDONLY); + if (fd < 0) + return fd; + + rc = ioctl(fd, FS_IOC_GETFLAGS, &flags); + if (rc < 0) { + error = errno; + close(fd); + errno = error; + return rc; + } + close(fd); + if (flags & FS_IMMUTABLE_FL) + return 1; + return 0; +} int main(int argc, char **argv) { @@ -27,7 +85,7 @@ int main(int argc, char **argv) buf[4] = 0; /* create a test variable */ - fd = open(path, O_WRONLY | O_CREAT); + fd = open(path, O_WRONLY | O_CREAT, 0600); if (fd < 0) { perror("open(O_WRONLY)"); return EXIT_FAILURE; @@ -41,6 +99,18 @@ int main(int argc, char **argv) close(fd); + rc = get_immutable(path); + if (rc < 0) { + perror("ioctl(FS_IOC_GETFLAGS)"); + return EXIT_FAILURE; + } else if (rc) { + rc = set_immutable(path, 0); + if (rc < 0) { + perror("ioctl(FS_IOC_SETFLAGS)"); + return EXIT_FAILURE; + } + } + fd = open(path, O_RDONLY); if (fd < 0) { perror("open"); diff --git a/tools/testing/selftests/firmware/config b/tools/testing/selftests/firmware/config new file mode 100644 index 000000000000..c8137f70e291 --- /dev/null +++ b/tools/testing/selftests/firmware/config @@ -0,0 +1 @@ +CONFIG_TEST_FIRMWARE=y diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/ftrace/config new file mode 100644 index 000000000000..ef8214661612 --- /dev/null +++ b/tools/testing/selftests/ftrace/config @@ -0,0 +1 @@ +CONFIG_FTRACE=y diff --git a/tools/testing/selftests/ftrace/test.d/instances/instance.tc b/tools/testing/selftests/ftrace/test.d/instances/instance.tc index 773e276ff90b..1e1abe0ad354 100644 --- a/tools/testing/selftests/ftrace/test.d/instances/instance.tc +++ b/tools/testing/selftests/ftrace/test.d/instances/instance.tc @@ -39,28 +39,23 @@ instance_slam() { } instance_slam & -x=`jobs -l` -p1=`echo $x | cut -d' ' -f2` +p1=$! echo $p1 instance_slam & -x=`jobs -l | tail -1` -p2=`echo $x | cut -d' ' -f2` +p2=$! echo $p2 instance_slam & -x=`jobs -l | tail -1` -p3=`echo $x | cut -d' ' -f2` +p3=$! echo $p3 instance_slam & -x=`jobs -l | tail -1` -p4=`echo $x | cut -d' ' -f2` +p4=$! echo $p4 instance_slam & -x=`jobs -l | tail -1` -p5=`echo $x | cut -d' ' -f2` +p5=$! echo $p5 ls -lR >/dev/null diff --git a/tools/testing/selftests/ipc/.gitignore b/tools/testing/selftests/ipc/.gitignore new file mode 100644 index 000000000000..84b66a3c1f74 --- /dev/null +++ b/tools/testing/selftests/ipc/.gitignore @@ -0,0 +1 @@ +msgque_test diff --git a/tools/testing/selftests/ipc/config b/tools/testing/selftests/ipc/config new file mode 100644 index 000000000000..0702447109f5 --- /dev/null +++ b/tools/testing/selftests/ipc/config @@ -0,0 +1,2 @@ +CONFIG_EXPERT=y +CONFIG_CHECKPOINT_RESTORE=y diff --git a/tools/testing/selftests/media_tests/.gitignore b/tools/testing/selftests/media_tests/.gitignore new file mode 100644 index 000000000000..1c0711708b98 --- /dev/null +++ b/tools/testing/selftests/media_tests/.gitignore @@ -0,0 +1 @@ +media_device_test diff --git a/tools/testing/selftests/media_tests/Makefile b/tools/testing/selftests/media_tests/Makefile new file mode 100644 index 000000000000..7071bcc1d066 --- /dev/null +++ b/tools/testing/selftests/media_tests/Makefile @@ -0,0 +1,7 @@ +TEST_PROGS := media_device_test +all: $(TEST_PROGS) + +include ../lib.mk + +clean: + rm -fr media_device_test diff --git a/tools/testing/selftests/media_tests/media_device_test.c b/tools/testing/selftests/media_tests/media_device_test.c new file mode 100644 index 000000000000..cbf53a032ab5 --- /dev/null +++ b/tools/testing/selftests/media_tests/media_device_test.c @@ -0,0 +1,95 @@ +/* + * media_devkref_test.c - Media Controller Device Kref API Test + * + * Copyright (c) 2016 Shuah Khan <shuahkh@osg.samsung.com> + * Copyright (c) 2016 Samsung Electronics Co., Ltd. + * + * This file is released under the GPLv2. + */ + +/* + * This file adds a test for Media Controller API. + * This test should be run as root and should not be + * included in the Kselftest run. This test should be + * run when hardware and driver that makes use Media + * Controller API are present in the system. + * + * This test opens user specified Media Device and calls + * MEDIA_IOC_DEVICE_INFO ioctl in a loop once every 10 + * seconds. + * + * Usage: + * sudo ./media_device_test -d /dev/mediaX + * + * While test is running, remove the device and + * ensure there are no use after free errors and + * other Oops in the dmesg. Enable KaSan kernel + * config option for use-after-free error detection. +*/ + +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <errno.h> +#include <string.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <linux/media.h> + +int main(int argc, char **argv) +{ + int opt; + char media_device[256]; + int count = 0; + struct media_device_info mdi; + int ret; + int fd; + + if (argc < 2) { + printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); + exit(-1); + } + + /* Process arguments */ + while ((opt = getopt(argc, argv, "d:")) != -1) { + switch (opt) { + case 'd': + strncpy(media_device, optarg, sizeof(media_device) - 1); + media_device[sizeof(media_device)-1] = '\0'; + break; + default: + printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); + exit(-1); + } + } + + if (getuid() != 0) { + printf("Please run the test as root - Exiting.\n"); + exit(-1); + } + + /* Open Media device and keep it open */ + fd = open(media_device, O_RDWR); + if (fd == -1) { + printf("Media Device open errno %s\n", strerror(errno)); + exit(-1); + } + + printf("\nNote:\n" + "While test is running, remove the device and\n" + "ensure there are no use after free errors and\n" + "other Oops in the dmesg. Enable KaSan kernel\n" + "config option for use-after-free error detection.\n\n"); + + while (count < 100) { + ret = ioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi); + if (ret < 0) + printf("Media Device Info errno %s\n", strerror(errno)); + else + printf("Media device model %s driver %s\n", + mdi.model, mdi.driver); + sleep(10); + count++; + } +} diff --git a/tools/testing/selftests/memory-hotplug/config b/tools/testing/selftests/memory-hotplug/config new file mode 100644 index 000000000000..2fde30191a47 --- /dev/null +++ b/tools/testing/selftests/memory-hotplug/config @@ -0,0 +1,4 @@ +CONFIG_MEMORY_HOTPLUG=y +CONFIG_MEMORY_HOTPLUG_SPARSE=y +CONFIG_NOTIFIER_ERROR_INJECTION=y +CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m diff --git a/tools/testing/selftests/mount/config b/tools/testing/selftests/mount/config new file mode 100644 index 000000000000..b5d881e48548 --- /dev/null +++ b/tools/testing/selftests/mount/config @@ -0,0 +1,2 @@ +CONFIG_USER_NS=y +CONFIG_DEVPTS_MULTIPLE_INSTANCES=y diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config new file mode 100644 index 000000000000..e57b4ac40e72 --- /dev/null +++ b/tools/testing/selftests/net/config @@ -0,0 +1,3 @@ +CONFIG_USER_NS=y +CONFIG_BPF_SYSCALL=y +CONFIG_TEST_BPF=m diff --git a/tools/testing/selftests/pstore/config b/tools/testing/selftests/pstore/config new file mode 100644 index 000000000000..6a8e5a9bfc10 --- /dev/null +++ b/tools/testing/selftests/pstore/config @@ -0,0 +1,4 @@ +CONFIG_MISC_FILESYSTEMS=y +CONFIG_PSTORE=y +CONFIG_PSTORE_PMSG=y +CONFIG_PSTORE_CONSOLE=y diff --git a/tools/testing/selftests/rcutorture/bin/parse-console.sh b/tools/testing/selftests/rcutorture/bin/parse-console.sh index 844787a0d7be..5eb49b7f864c 100755 --- a/tools/testing/selftests/rcutorture/bin/parse-console.sh +++ b/tools/testing/selftests/rcutorture/bin/parse-console.sh @@ -33,7 +33,7 @@ if grep -Pq '\x00' < $file then print_warning Console output contains nul bytes, old qemu still running? fi -egrep 'Badness|WARNING:|Warn|BUG|===========|Call Trace:|Oops:|detected stalls on CPUs/tasks:|Stall ended before state dump start' < $file | grep -v 'ODEBUG: ' | grep -v 'Warning: unable to open an initial console' > $1.diags +egrep 'Badness|WARNING:|Warn|BUG|===========|Call Trace:|Oops:|detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state' < $file | grep -v 'ODEBUG: ' | grep -v 'Warning: unable to open an initial console' > $1.diags if test -s $1.diags then print_warning Assertion failure in $file $title @@ -64,10 +64,12 @@ then then summary="$summary lockdep: $n_badness" fi - n_stalls=`egrep -c 'detected stalls on CPUs/tasks:|Stall ended before state dump start' $1` + n_stalls=`egrep -c 'detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state' $1` if test "$n_stalls" -ne 0 then summary="$summary Stalls: $n_stalls" fi print_warning Summary: $summary +else + rm $1.diags fi diff --git a/tools/testing/selftests/seccomp/config b/tools/testing/selftests/seccomp/config new file mode 100644 index 000000000000..db1e11b08c8a --- /dev/null +++ b/tools/testing/selftests/seccomp/config @@ -0,0 +1,2 @@ +CONFIG_SECCOMP=y +CONFIG_SECCOMP_FILTER=y diff --git a/tools/testing/selftests/static_keys/config b/tools/testing/selftests/static_keys/config new file mode 100644 index 000000000000..d538fb774b96 --- /dev/null +++ b/tools/testing/selftests/static_keys/config @@ -0,0 +1 @@ +CONFIG_TEST_STATIC_KEYS=m diff --git a/tools/testing/selftests/timers/alarmtimer-suspend.c b/tools/testing/selftests/timers/alarmtimer-suspend.c index 72cacf5383dd..2b361b830395 100644 --- a/tools/testing/selftests/timers/alarmtimer-suspend.c +++ b/tools/testing/selftests/timers/alarmtimer-suspend.c @@ -153,7 +153,7 @@ int main(void) alarmcount = 0; if (timer_create(alarm_clock_id, &se, &tm1) == -1) { - printf("timer_create failled, %s unspported?\n", + printf("timer_create failed, %s unsupported?\n", clockstring(alarm_clock_id)); break; } diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c index e86d937cc22c..60fe3c569bd9 100644 --- a/tools/testing/selftests/timers/valid-adjtimex.c +++ b/tools/testing/selftests/timers/valid-adjtimex.c @@ -45,7 +45,17 @@ static inline int ksft_exit_fail(void) } #endif -#define NSEC_PER_SEC 1000000000L +#define NSEC_PER_SEC 1000000000LL +#define USEC_PER_SEC 1000000LL + +#define ADJ_SETOFFSET 0x0100 + +#include <sys/syscall.h> +static int clock_adjtime(clockid_t id, struct timex *tx) +{ + return syscall(__NR_clock_adjtime, id, tx); +} + /* clear NTP time_status & time_state */ int clear_time_state(void) @@ -193,10 +203,137 @@ out: } +int set_offset(long long offset, int use_nano) +{ + struct timex tmx = {}; + int ret; + + tmx.modes = ADJ_SETOFFSET; + if (use_nano) { + tmx.modes |= ADJ_NANO; + + tmx.time.tv_sec = offset / NSEC_PER_SEC; + tmx.time.tv_usec = offset % NSEC_PER_SEC; + + if (offset < 0 && tmx.time.tv_usec) { + tmx.time.tv_sec -= 1; + tmx.time.tv_usec += NSEC_PER_SEC; + } + } else { + tmx.time.tv_sec = offset / USEC_PER_SEC; + tmx.time.tv_usec = offset % USEC_PER_SEC; + + if (offset < 0 && tmx.time.tv_usec) { + tmx.time.tv_sec -= 1; + tmx.time.tv_usec += USEC_PER_SEC; + } + } + + ret = clock_adjtime(CLOCK_REALTIME, &tmx); + if (ret < 0) { + printf("(sec: %ld usec: %ld) ", tmx.time.tv_sec, tmx.time.tv_usec); + printf("[FAIL]\n"); + return -1; + } + return 0; +} + +int set_bad_offset(long sec, long usec, int use_nano) +{ + struct timex tmx = {}; + int ret; + + tmx.modes = ADJ_SETOFFSET; + if (use_nano) + tmx.modes |= ADJ_NANO; + + tmx.time.tv_sec = sec; + tmx.time.tv_usec = usec; + ret = clock_adjtime(CLOCK_REALTIME, &tmx); + if (ret >= 0) { + printf("Invalid (sec: %ld usec: %ld) did not fail! ", tmx.time.tv_sec, tmx.time.tv_usec); + printf("[FAIL]\n"); + return -1; + } + return 0; +} + +int validate_set_offset(void) +{ + printf("Testing ADJ_SETOFFSET... "); + + /* Test valid values */ + if (set_offset(NSEC_PER_SEC - 1, 1)) + return -1; + + if (set_offset(-NSEC_PER_SEC + 1, 1)) + return -1; + + if (set_offset(-NSEC_PER_SEC - 1, 1)) + return -1; + + if (set_offset(5 * NSEC_PER_SEC, 1)) + return -1; + + if (set_offset(-5 * NSEC_PER_SEC, 1)) + return -1; + + if (set_offset(5 * NSEC_PER_SEC + NSEC_PER_SEC / 2, 1)) + return -1; + + if (set_offset(-5 * NSEC_PER_SEC - NSEC_PER_SEC / 2, 1)) + return -1; + + if (set_offset(USEC_PER_SEC - 1, 0)) + return -1; + + if (set_offset(-USEC_PER_SEC + 1, 0)) + return -1; + + if (set_offset(-USEC_PER_SEC - 1, 0)) + return -1; + + if (set_offset(5 * USEC_PER_SEC, 0)) + return -1; + + if (set_offset(-5 * USEC_PER_SEC, 0)) + return -1; + + if (set_offset(5 * USEC_PER_SEC + USEC_PER_SEC / 2, 0)) + return -1; + + if (set_offset(-5 * USEC_PER_SEC - USEC_PER_SEC / 2, 0)) + return -1; + + /* Test invalid values */ + if (set_bad_offset(0, -1, 1)) + return -1; + if (set_bad_offset(0, -1, 0)) + return -1; + if (set_bad_offset(0, 2 * NSEC_PER_SEC, 1)) + return -1; + if (set_bad_offset(0, 2 * USEC_PER_SEC, 0)) + return -1; + if (set_bad_offset(0, NSEC_PER_SEC, 1)) + return -1; + if (set_bad_offset(0, USEC_PER_SEC, 0)) + return -1; + if (set_bad_offset(0, -NSEC_PER_SEC, 1)) + return -1; + if (set_bad_offset(0, -USEC_PER_SEC, 0)) + return -1; + + printf("[OK]\n"); + return 0; +} + int main(int argc, char **argv) { if (validate_freq()) return ksft_exit_fail(); + if (validate_set_offset()) + return ksft_exit_fail(); + return ksft_exit_pass(); } diff --git a/tools/testing/selftests/user/config b/tools/testing/selftests/user/config new file mode 100644 index 000000000000..784ed8416324 --- /dev/null +++ b/tools/testing/selftests/user/config @@ -0,0 +1 @@ +CONFIG_TEST_USER_COPY=m diff --git a/tools/testing/selftests/vm/config b/tools/testing/selftests/vm/config new file mode 100644 index 000000000000..698c7ed28a26 --- /dev/null +++ b/tools/testing/selftests/vm/config @@ -0,0 +1 @@ +CONFIG_USERFAULTFD=y diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile index d0c473f65850..d5ce7d7aae3e 100644 --- a/tools/testing/selftests/x86/Makefile +++ b/tools/testing/selftests/x86/Makefile @@ -4,15 +4,16 @@ include ../lib.mk .PHONY: all all_32 all_64 warn_32bit_failure clean -TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs syscall_nt ptrace_syscall -TARGETS_C_32BIT_ONLY := entry_from_vm86 syscall_arg_fault sigreturn test_syscall_vdso unwind_vdso \ +TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs syscall_nt ptrace_syscall \ + check_initial_reg_state sigreturn ldt_gdt +TARGETS_C_32BIT_ONLY := entry_from_vm86 syscall_arg_fault test_syscall_vdso unwind_vdso \ test_FCMOV test_FCOMI test_FISTTP \ - ldt_gdt \ vdso_restorer TARGETS_C_32BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_32BIT_ONLY) +TARGETS_C_64BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_64BIT_ONLY) BINARIES_32 := $(TARGETS_C_32BIT_ALL:%=%_32) -BINARIES_64 := $(TARGETS_C_BOTHBITS:%=%_64) +BINARIES_64 := $(TARGETS_C_64BIT_ALL:%=%_64) CFLAGS := -O2 -g -std=gnu99 -pthread -Wall @@ -40,7 +41,7 @@ clean: $(TARGETS_C_32BIT_ALL:%=%_32): %_32: %.c $(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl -lm -$(TARGETS_C_BOTHBITS:%=%_64): %_64: %.c +$(TARGETS_C_64BIT_ALL:%=%_64): %_64: %.c $(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl # x86_64 users should be encouraged to install 32-bit libraries @@ -65,3 +66,9 @@ endif sysret_ss_attrs_64: thunks.S ptrace_syscall_32: raw_syscall_helper_32.S test_syscall_vdso_32: thunks_32.S + +# check_initial_reg_state is special: it needs a custom entry, and it +# needs to be static so that its interpreter doesn't destroy its initial +# state. +check_initial_reg_state_32: CFLAGS += -Wl,-ereal_start -static +check_initial_reg_state_64: CFLAGS += -Wl,-ereal_start -static diff --git a/tools/testing/selftests/x86/check_initial_reg_state.c b/tools/testing/selftests/x86/check_initial_reg_state.c new file mode 100644 index 000000000000..6aaed9b85baf --- /dev/null +++ b/tools/testing/selftests/x86/check_initial_reg_state.c @@ -0,0 +1,109 @@ +/* + * check_initial_reg_state.c - check that execve sets the correct state + * Copyright (c) 2014-2016 Andrew Lutomirski + * + * This program is free software; you can redistribute it and/or modify + * it under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#define _GNU_SOURCE + +#include <stdio.h> + +unsigned long ax, bx, cx, dx, si, di, bp, sp, flags; +unsigned long r8, r9, r10, r11, r12, r13, r14, r15; + +asm ( + ".pushsection .text\n\t" + ".type real_start, @function\n\t" + ".global real_start\n\t" + "real_start:\n\t" +#ifdef __x86_64__ + "mov %rax, ax\n\t" + "mov %rbx, bx\n\t" + "mov %rcx, cx\n\t" + "mov %rdx, dx\n\t" + "mov %rsi, si\n\t" + "mov %rdi, di\n\t" + "mov %rbp, bp\n\t" + "mov %rsp, sp\n\t" + "mov %r8, r8\n\t" + "mov %r9, r9\n\t" + "mov %r10, r10\n\t" + "mov %r11, r11\n\t" + "mov %r12, r12\n\t" + "mov %r13, r13\n\t" + "mov %r14, r14\n\t" + "mov %r15, r15\n\t" + "pushfq\n\t" + "popq flags\n\t" +#else + "mov %eax, ax\n\t" + "mov %ebx, bx\n\t" + "mov %ecx, cx\n\t" + "mov %edx, dx\n\t" + "mov %esi, si\n\t" + "mov %edi, di\n\t" + "mov %ebp, bp\n\t" + "mov %esp, sp\n\t" + "pushfl\n\t" + "popl flags\n\t" +#endif + "jmp _start\n\t" + ".size real_start, . - real_start\n\t" + ".popsection"); + +int main() +{ + int nerrs = 0; + + if (sp == 0) { + printf("[FAIL]\tTest was built incorrectly\n"); + return 1; + } + + if (ax || bx || cx || dx || si || di || bp +#ifdef __x86_64__ + || r8 || r9 || r10 || r11 || r12 || r13 || r14 || r15 +#endif + ) { + printf("[FAIL]\tAll GPRs except SP should be 0\n"); +#define SHOW(x) printf("\t" #x " = 0x%lx\n", x); + SHOW(ax); + SHOW(bx); + SHOW(cx); + SHOW(dx); + SHOW(si); + SHOW(di); + SHOW(bp); + SHOW(sp); +#ifdef __x86_64__ + SHOW(r8); + SHOW(r9); + SHOW(r10); + SHOW(r11); + SHOW(r12); + SHOW(r13); + SHOW(r14); + SHOW(r15); +#endif + nerrs++; + } else { + printf("[OK]\tAll GPRs except SP are 0\n"); + } + + if (flags != 0x202) { + printf("[FAIL]\tFLAGS is 0x%lx, but it should be 0x202\n", flags); + nerrs++; + } else { + printf("[OK]\tFLAGS is 0x202\n"); + } + + return nerrs ? 1 : 0; +} diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/selftests/x86/ptrace_syscall.c index 5105b49cd8aa..421456784bc6 100644 --- a/tools/testing/selftests/x86/ptrace_syscall.c +++ b/tools/testing/selftests/x86/ptrace_syscall.c @@ -103,6 +103,17 @@ static void sethandler(int sig, void (*handler)(int, siginfo_t *, void *), err(1, "sigaction"); } +static void setsigign(int sig, int flags) +{ + struct sigaction sa; + memset(&sa, 0, sizeof(sa)); + sa.sa_sigaction = (void *)SIG_IGN; + sa.sa_flags = flags; + sigemptyset(&sa.sa_mask); + if (sigaction(sig, &sa, 0)) + err(1, "sigaction"); +} + static void clearhandler(int sig) { struct sigaction sa; @@ -187,7 +198,7 @@ static void test_ptrace_syscall_restart(void) printf("[RUN]\tSYSEMU\n"); if (ptrace(PTRACE_SYSEMU, chld, 0, 0) != 0) - err(1, "PTRACE_SYSCALL"); + err(1, "PTRACE_SYSEMU"); wait_trap(chld); if (ptrace(PTRACE_GETREGS, chld, 0, ®s) != 0) @@ -218,7 +229,7 @@ static void test_ptrace_syscall_restart(void) err(1, "PTRACE_SETREGS"); if (ptrace(PTRACE_SYSEMU, chld, 0, 0) != 0) - err(1, "PTRACE_SYSCALL"); + err(1, "PTRACE_SYSEMU"); wait_trap(chld); if (ptrace(PTRACE_GETREGS, chld, 0, ®s) != 0) @@ -250,7 +261,7 @@ static void test_ptrace_syscall_restart(void) err(1, "PTRACE_SETREGS"); if (ptrace(PTRACE_SYSEMU, chld, 0, 0) != 0) - err(1, "PTRACE_SYSCALL"); + err(1, "PTRACE_SYSEMU"); wait_trap(chld); if (ptrace(PTRACE_GETREGS, chld, 0, ®s) != 0) @@ -277,6 +288,119 @@ static void test_ptrace_syscall_restart(void) } } +static void test_restart_under_ptrace(void) +{ + printf("[RUN]\tkernel syscall restart under ptrace\n"); + pid_t chld = fork(); + if (chld < 0) + err(1, "fork"); + + if (chld == 0) { + if (ptrace(PTRACE_TRACEME, 0, 0, 0) != 0) + err(1, "PTRACE_TRACEME"); + + printf("\tChild will take a nap until signaled\n"); + setsigign(SIGUSR1, SA_RESTART); + raise(SIGSTOP); + + syscall(SYS_pause, 0, 0, 0, 0, 0, 0); + _exit(0); + } + + int status; + + /* Wait for SIGSTOP. */ + if (waitpid(chld, &status, 0) != chld || !WIFSTOPPED(status)) + err(1, "waitpid"); + + struct user_regs_struct regs; + + printf("[RUN]\tSYSCALL\n"); + if (ptrace(PTRACE_SYSCALL, chld, 0, 0) != 0) + err(1, "PTRACE_SYSCALL"); + wait_trap(chld); + + /* We should be stopped at pause(2) entry. */ + + if (ptrace(PTRACE_GETREGS, chld, 0, ®s) != 0) + err(1, "PTRACE_GETREGS"); + + if (regs.user_syscall_nr != SYS_pause || + regs.user_arg0 != 0 || regs.user_arg1 != 0 || + regs.user_arg2 != 0 || regs.user_arg3 != 0 || + regs.user_arg4 != 0 || regs.user_arg5 != 0) { + printf("[FAIL]\tInitial args are wrong (nr=%lu, args=%lu %lu %lu %lu %lu %lu)\n", (unsigned long)regs.user_syscall_nr, (unsigned long)regs.user_arg0, (unsigned long)regs.user_arg1, (unsigned long)regs.user_arg2, (unsigned long)regs.user_arg3, (unsigned long)regs.user_arg4, (unsigned long)regs.user_arg5); + nerrs++; + } else { + printf("[OK]\tInitial nr and args are correct\n"); + } + + /* Interrupt it. */ + kill(chld, SIGUSR1); + + /* Advance. We should be stopped at exit. */ + printf("[RUN]\tSYSCALL\n"); + if (ptrace(PTRACE_SYSCALL, chld, 0, 0) != 0) + err(1, "PTRACE_SYSCALL"); + wait_trap(chld); + + if (ptrace(PTRACE_GETREGS, chld, 0, ®s) != 0) + err(1, "PTRACE_GETREGS"); + + if (regs.user_syscall_nr != SYS_pause || + regs.user_arg0 != 0 || regs.user_arg1 != 0 || + regs.user_arg2 != 0 || regs.user_arg3 != 0 || + regs.user_arg4 != 0 || regs.user_arg5 != 0) { + printf("[FAIL]\tArgs after SIGUSR1 are wrong (nr=%lu, args=%lu %lu %lu %lu %lu %lu)\n", (unsigned long)regs.user_syscall_nr, (unsigned long)regs.user_arg0, (unsigned long)regs.user_arg1, (unsigned long)regs.user_arg2, (unsigned long)regs.user_arg3, (unsigned long)regs.user_arg4, (unsigned long)regs.user_arg5); + nerrs++; + } else { + printf("[OK]\tArgs after SIGUSR1 are correct (ax = %ld)\n", + (long)regs.user_ax); + } + + /* Poke the regs back in. This must not break anything. */ + if (ptrace(PTRACE_SETREGS, chld, 0, ®s) != 0) + err(1, "PTRACE_SETREGS"); + + /* Catch the (ignored) SIGUSR1. */ + if (ptrace(PTRACE_CONT, chld, 0, 0) != 0) + err(1, "PTRACE_CONT"); + if (waitpid(chld, &status, 0) != chld) + err(1, "waitpid"); + if (!WIFSTOPPED(status)) { + printf("[FAIL]\tChild was stopped for SIGUSR1 (status = 0x%x)\n", status); + nerrs++; + } else { + printf("[OK]\tChild got SIGUSR1\n"); + } + + /* The next event should be pause(2) again. */ + printf("[RUN]\tStep again\n"); + if (ptrace(PTRACE_SYSCALL, chld, 0, 0) != 0) + err(1, "PTRACE_SYSCALL"); + wait_trap(chld); + + /* We should be stopped at pause(2) entry. */ + + if (ptrace(PTRACE_GETREGS, chld, 0, ®s) != 0) + err(1, "PTRACE_GETREGS"); + + if (regs.user_syscall_nr != SYS_pause || + regs.user_arg0 != 0 || regs.user_arg1 != 0 || + regs.user_arg2 != 0 || regs.user_arg3 != 0 || + regs.user_arg4 != 0 || regs.user_arg5 != 0) { + printf("[FAIL]\tpause did not restart (nr=%lu, args=%lu %lu %lu %lu %lu %lu)\n", (unsigned long)regs.user_syscall_nr, (unsigned long)regs.user_arg0, (unsigned long)regs.user_arg1, (unsigned long)regs.user_arg2, (unsigned long)regs.user_arg3, (unsigned long)regs.user_arg4, (unsigned long)regs.user_arg5); + nerrs++; + } else { + printf("[OK]\tpause(2) restarted correctly\n"); + } + + /* Kill it. */ + kill(chld, SIGKILL); + if (waitpid(chld, &status, 0) != chld) + err(1, "waitpid"); +} + int main() { printf("[RUN]\tCheck int80 return regs\n"); @@ -290,5 +414,7 @@ int main() test_ptrace_syscall_restart(); + test_restart_under_ptrace(); + return 0; } diff --git a/tools/testing/selftests/x86/sigreturn.c b/tools/testing/selftests/x86/sigreturn.c index b5aa1bab7416..8a577e7070c6 100644 --- a/tools/testing/selftests/x86/sigreturn.c +++ b/tools/testing/selftests/x86/sigreturn.c @@ -54,6 +54,37 @@ #include <sys/ptrace.h> #include <sys/user.h> +/* Pull in AR_xyz defines. */ +typedef unsigned int u32; +typedef unsigned short u16; +#include "../../../../arch/x86/include/asm/desc_defs.h" + +/* + * Copied from asm/ucontext.h, as asm/ucontext.h conflicts badly with the glibc + * headers. + */ +#ifdef __x86_64__ +/* + * UC_SIGCONTEXT_SS will be set when delivering 64-bit or x32 signals on + * kernels that save SS in the sigcontext. All kernels that set + * UC_SIGCONTEXT_SS will correctly restore at least the low 32 bits of esp + * regardless of SS (i.e. they implement espfix). + * + * Kernels that set UC_SIGCONTEXT_SS will also set UC_STRICT_RESTORE_SS + * when delivering a signal that came from 64-bit code. + * + * Sigreturn restores SS as follows: + * + * if (saved SS is valid || UC_STRICT_RESTORE_SS is set || + * saved CS is not 64-bit) + * new SS = saved SS (will fail IRET and signal if invalid) + * else + * new SS = a flat 32-bit data segment + */ +#define UC_SIGCONTEXT_SS 0x2 +#define UC_STRICT_RESTORE_SS 0x4 +#endif + /* * In principle, this test can run on Linux emulation layers (e.g. * Illumos "LX branded zones"). Solaris-based kernels reserve LDT @@ -267,6 +298,9 @@ static gregset_t initial_regs, requested_regs, resulting_regs; /* Instructions for the SIGUSR1 handler. */ static volatile unsigned short sig_cs, sig_ss; static volatile sig_atomic_t sig_trapped, sig_err, sig_trapno; +#ifdef __x86_64__ +static volatile sig_atomic_t sig_corrupt_final_ss; +#endif /* Abstractions for some 32-bit vs 64-bit differences. */ #ifdef __x86_64__ @@ -305,9 +339,105 @@ static greg_t *csptr(ucontext_t *ctx) } #endif +/* + * Checks a given selector for its code bitness or returns -1 if it's not + * a usable code segment selector. + */ +int cs_bitness(unsigned short cs) +{ + uint32_t valid = 0, ar; + asm ("lar %[cs], %[ar]\n\t" + "jnz 1f\n\t" + "mov $1, %[valid]\n\t" + "1:" + : [ar] "=r" (ar), [valid] "+rm" (valid) + : [cs] "r" (cs)); + + if (!valid) + return -1; + + bool db = (ar & (1 << 22)); + bool l = (ar & (1 << 21)); + + if (!(ar & (1<<11))) + return -1; /* Not code. */ + + if (l && !db) + return 64; + else if (!l && db) + return 32; + else if (!l && !db) + return 16; + else + return -1; /* Unknown bitness. */ +} + +/* + * Checks a given selector for its code bitness or returns -1 if it's not + * a usable code segment selector. + */ +bool is_valid_ss(unsigned short cs) +{ + uint32_t valid = 0, ar; + asm ("lar %[cs], %[ar]\n\t" + "jnz 1f\n\t" + "mov $1, %[valid]\n\t" + "1:" + : [ar] "=r" (ar), [valid] "+rm" (valid) + : [cs] "r" (cs)); + + if (!valid) + return false; + + if ((ar & AR_TYPE_MASK) != AR_TYPE_RWDATA && + (ar & AR_TYPE_MASK) != AR_TYPE_RWDATA_EXPDOWN) + return false; + + return (ar & AR_P); +} + /* Number of errors in the current test case. */ static volatile sig_atomic_t nerrs; +static void validate_signal_ss(int sig, ucontext_t *ctx) +{ +#ifdef __x86_64__ + bool was_64bit = (cs_bitness(*csptr(ctx)) == 64); + + if (!(ctx->uc_flags & UC_SIGCONTEXT_SS)) { + printf("[FAIL]\tUC_SIGCONTEXT_SS was not set\n"); + nerrs++; + + /* + * This happens on Linux 4.1. The rest will fail, too, so + * return now to reduce the noise. + */ + return; + } + + /* UC_STRICT_RESTORE_SS is set iff we came from 64-bit mode. */ + if (!!(ctx->uc_flags & UC_STRICT_RESTORE_SS) != was_64bit) { + printf("[FAIL]\tUC_STRICT_RESTORE_SS was wrong in signal %d\n", + sig); + nerrs++; + } + + if (is_valid_ss(*ssptr(ctx))) { + /* + * DOSEMU was written before 64-bit sigcontext had SS, and + * it tries to figure out the signal source SS by looking at + * the physical register. Make sure that keeps working. + */ + unsigned short hw_ss; + asm ("mov %%ss, %0" : "=rm" (hw_ss)); + if (hw_ss != *ssptr(ctx)) { + printf("[FAIL]\tHW SS didn't match saved SS\n"); + nerrs++; + } + } +#endif +} + /* * SIGUSR1 handler. Sets CS and SS as requested and points IP to the * int3 trampoline. Sets SP to a large known value so that we can see @@ -317,6 +447,8 @@ static void sigusr1(int sig, siginfo_t *info, void *ctx_void) { ucontext_t *ctx = (ucontext_t*)ctx_void; + validate_signal_ss(sig, ctx); + memcpy(&initial_regs, &ctx->uc_mcontext.gregs, sizeof(gregset_t)); *csptr(ctx) = sig_cs; @@ -334,13 +466,16 @@ static void sigusr1(int sig, siginfo_t *info, void *ctx_void) } /* - * Called after a successful sigreturn. Restores our state so that - * the original raise(SIGUSR1) returns. + * Called after a successful sigreturn (via int3) or from a failed + * sigreturn (directly by kernel). Restores our state so that the + * original raise(SIGUSR1) returns. */ static void sigtrap(int sig, siginfo_t *info, void *ctx_void) { ucontext_t *ctx = (ucontext_t*)ctx_void; + validate_signal_ss(sig, ctx); + sig_err = ctx->uc_mcontext.gregs[REG_ERR]; sig_trapno = ctx->uc_mcontext.gregs[REG_TRAPNO]; @@ -358,41 +493,62 @@ static void sigtrap(int sig, siginfo_t *info, void *ctx_void) memcpy(&resulting_regs, &ctx->uc_mcontext.gregs, sizeof(gregset_t)); memcpy(&ctx->uc_mcontext.gregs, &initial_regs, sizeof(gregset_t)); +#ifdef __x86_64__ + if (sig_corrupt_final_ss) { + if (ctx->uc_flags & UC_STRICT_RESTORE_SS) { + printf("[FAIL]\tUC_STRICT_RESTORE_SS was set inappropriately\n"); + nerrs++; + } else { + /* + * DOSEMU transitions from 32-bit to 64-bit mode by + * adjusting sigcontext, and it requires that this work + * even if the saved SS is bogus. + */ + printf("\tCorrupting SS on return to 64-bit mode\n"); + *ssptr(ctx) = 0; + } + } +#endif + sig_trapped = sig; } -/* - * Checks a given selector for its code bitness or returns -1 if it's not - * a usable code segment selector. - */ -int cs_bitness(unsigned short cs) +#ifdef __x86_64__ +/* Tests recovery if !UC_STRICT_RESTORE_SS */ +static void sigusr2(int sig, siginfo_t *info, void *ctx_void) { - uint32_t valid = 0, ar; - asm ("lar %[cs], %[ar]\n\t" - "jnz 1f\n\t" - "mov $1, %[valid]\n\t" - "1:" - : [ar] "=r" (ar), [valid] "+rm" (valid) - : [cs] "r" (cs)); + ucontext_t *ctx = (ucontext_t*)ctx_void; - if (!valid) - return -1; + if (!(ctx->uc_flags & UC_STRICT_RESTORE_SS)) { + printf("[FAIL]\traise(2) didn't set UC_STRICT_RESTORE_SS\n"); + nerrs++; + return; /* We can't do the rest. */ + } - bool db = (ar & (1 << 22)); - bool l = (ar & (1 << 21)); + ctx->uc_flags &= ~UC_STRICT_RESTORE_SS; + *ssptr(ctx) = 0; - if (!(ar & (1<<11))) - return -1; /* Not code. */ + /* Return. The kernel should recover without sending another signal. */ +} - if (l && !db) - return 64; - else if (!l && db) - return 32; - else if (!l && !db) - return 16; - else - return -1; /* Unknown bitness. */ +static int test_nonstrict_ss(void) +{ + clearhandler(SIGUSR1); + clearhandler(SIGTRAP); + clearhandler(SIGSEGV); + clearhandler(SIGILL); + sethandler(SIGUSR2, sigusr2, 0); + + nerrs = 0; + + printf("[RUN]\tClear UC_STRICT_RESTORE_SS and corrupt SS\n"); + raise(SIGUSR2); + if (!nerrs) + printf("[OK]\tIt worked\n"); + + return nerrs; } +#endif /* Finds a usable code segment of the requested bitness. */ int find_cs(int bitness) @@ -576,6 +732,12 @@ static int test_bad_iret(int cs_bits, unsigned short ss, int force_cs) errdesc, strsignal(sig_trapped)); return 0; } else { + /* + * This also implicitly tests UC_STRICT_RESTORE_SS: + * We check that these signals set UC_STRICT_RESTORE_SS and, + * if UC_STRICT_RESTORE_SS doesn't cause strict behavior, + * then we won't get SIGSEGV. + */ printf("[FAIL]\tDid not get SIGSEGV\n"); return 1; } @@ -632,6 +794,14 @@ int main() GDT3(gdt_data16_idx)); } +#ifdef __x86_64__ + /* Nasty ABI case: check SS corruption handling. */ + sig_corrupt_final_ss = 1; + total_nerrs += test_valid_sigreturn(32, false, -1); + total_nerrs += test_valid_sigreturn(32, true, -1); + sig_corrupt_final_ss = 0; +#endif + /* * We're done testing valid sigreturn cases. Now we test states * for which sigreturn itself will succeed but the subsequent @@ -680,5 +850,9 @@ int main() if (gdt_npdata32_idx) test_bad_iret(32, GDT3(gdt_npdata32_idx), -1); +#ifdef __x86_64__ + total_nerrs += test_nonstrict_ss(); +#endif + return total_nerrs ? 1 : 0; } diff --git a/tools/testing/selftests/x86/syscall_nt.c b/tools/testing/selftests/x86/syscall_nt.c index 60c06af4646a..43fcab367fb0 100644 --- a/tools/testing/selftests/x86/syscall_nt.c +++ b/tools/testing/selftests/x86/syscall_nt.c @@ -17,6 +17,9 @@ #include <stdio.h> #include <unistd.h> +#include <string.h> +#include <signal.h> +#include <err.h> #include <sys/syscall.h> #include <asm/processor-flags.h> @@ -26,6 +29,8 @@ # define WIDTH "l" #endif +static unsigned int nerrs; + static unsigned long get_eflags(void) { unsigned long eflags; @@ -39,16 +44,52 @@ static void set_eflags(unsigned long eflags) : : "rm" (eflags) : "flags"); } -int main() +static void sethandler(int sig, void (*handler)(int, siginfo_t *, void *), + int flags) { - printf("[RUN]\tSet NT and issue a syscall\n"); - set_eflags(get_eflags() | X86_EFLAGS_NT); + struct sigaction sa; + memset(&sa, 0, sizeof(sa)); + sa.sa_sigaction = handler; + sa.sa_flags = SA_SIGINFO | flags; + sigemptyset(&sa.sa_mask); + if (sigaction(sig, &sa, 0)) + err(1, "sigaction"); +} + +static void sigtrap(int sig, siginfo_t *si, void *ctx_void) +{ +} + +static void do_it(unsigned long extraflags) +{ + unsigned long flags; + + set_eflags(get_eflags() | extraflags); syscall(SYS_getpid); - if (get_eflags() & X86_EFLAGS_NT) { - printf("[OK]\tThe syscall worked and NT is still set\n"); - return 0; + flags = get_eflags(); + if ((flags & extraflags) == extraflags) { + printf("[OK]\tThe syscall worked and flags are still set\n"); } else { - printf("[FAIL]\tThe syscall worked but NT was cleared\n"); - return 1; + printf("[FAIL]\tThe syscall worked but flags were cleared (flags = 0x%lx but expected 0x%lx set)\n", + flags, extraflags); + nerrs++; } } + +int main(void) +{ + printf("[RUN]\tSet NT and issue a syscall\n"); + do_it(X86_EFLAGS_NT); + + /* + * Now try it again with TF set -- TF forces returns via IRET in all + * cases except non-ptregs-using 64-bit full fast path syscalls. + */ + + sethandler(SIGTRAP, sigtrap, 0); + + printf("[RUN]\tSet NT|TF and issue a syscall\n"); + do_it(X86_EFLAGS_NT | X86_EFLAGS_TF); + + return nerrs == 0 ? 0 : 1; +} diff --git a/tools/testing/selftests/zram/config b/tools/testing/selftests/zram/config new file mode 100644 index 000000000000..e0cc47e2c7e2 --- /dev/null +++ b/tools/testing/selftests/zram/config @@ -0,0 +1,2 @@ +CONFIG_ZSMALLOC=y +CONFIG_ZRAM=m |
