linux-toradex.git/lib/test_sysctl.c, branch v5.12-rc6

lib: test_sysctl: delete duplicated words

2020-10-16T18:11:20+00:00

Drop the repeated word "the".

Signed-off-by: Randy Dunlap 
Signed-off-by: Andrew Morton 
Link: https://lkml.kernel.org/r/20200823040520.1999-1-rdunlap@infradead.org
Signed-off-by: Linus Torvalds

Merge tag 'linux-kselftest-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

2020-06-09T17:03:12+00:00

Pull kselftest updates from Shuah Khan:
 "This consists of:

   - Several fixes from Masami Hiramatsu to improve coverage for lib and
     sysctl tests.

   - Clean up to vdso test and a new test for getcpu() from Mark Brown.

   - Add new gen_tar selftests Makefile target generate selftest package
     running "make gen_tar" in selftests directory from Veronika
     Kabatova.

   - Other miscellaneous fixes to timens, exec, tpm2 tests"

* tag 'linux-kselftest-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/sysctl: Make sysctl test driver as a module
  selftests/sysctl: Fix to load test_sysctl module
  lib: Make test_sysctl initialized as module
  lib: Make prime number generator independently selectable
  selftests/ftrace: Return unsupported if no error_log file
  selftests/ftrace: Use printf for backslash included command
  selftests/timens: handle a case when alarm clocks are not supported
  Kernel selftests: Add check if TPM devices are supported
  selftests: vdso: Add a selftest for vDSO getcpu()
  selftests: vdso: Use a header file to prototype parse_vdso API
  selftests: vdso: Rename vdso_test to vdso_test_gettimeofday
  selftests/exec: Verify execve of non-regular files fail
  selftests: introduce gen_tar Makefile target

lib/test_sysctl: support testing of sysctl. boot parameter

2020-06-08T18:05:56+00:00

Testing is done by a new parameter debug.test_sysctl.boot_int which
defaults to 0 and it's expected that the tester passes a boot parameter
that sets it to 1.  The test checks if it's set to 1.

To distinguish true failure from parameter not being set, the test
checks /proc/cmdline for the expected parameter, and whether test_sysctl
is built-in and not a module.

[vbabka@suse.cz: skip the new test if boot_int sysctl is not present]
  Link: http://lkml.kernel.org/r/305af605-1e60-cf84-fada-6ce1ca37c102@suse.cz

Signed-off-by: Vlastimil Babka 
Signed-off-by: Andrew Morton 
Cc: Alexey Dobriyan 
Cc: Christian Brauner 
Cc: David Rientjes 
Cc: "Eric W . Biederman" 
Cc: Greg Kroah-Hartman 
Cc: "Guilherme G . Piccoli" 
Cc: Iurii Zaikin 
Cc: Ivan Teterevkov 
Cc: Kees Cook 
Cc: Luis Chamberlain 
Cc: Masami Hiramatsu 
Cc: Matthew Wilcox 
Cc: Michal Hocko 
Cc: Michal Hocko 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/20200427180433.7029-6-vbabka@suse.cz
Signed-off-by: Linus Torvalds

lib: Make test_sysctl initialized as module

2020-06-02T16:26:14+00:00

test_sysctl.c is expected to be used as a module, but since
it does not use module_init(), it never be registered as
a module and not appeared under /sys/module/.
In the result, the selftests/sysctl/sysctl.sh always fails
to find the test module and is skipped.

This makes test_sysctl.c initialized as a module by module_init()
and allow sysctl.sh to find the test module is loaded.

Signed-off-by: Masami Hiramatsu 
Reviewed-by: Luis Chamberlain 
Signed-off-by: Shuah Khan

tools/testing/selftests/sysctl/sysctl.sh: add proc_do_large_bitmap() test case

2019-05-15T02:52:51+00:00

The kernel has only two users of proc_do_large_bitmap(), the kernel CPU
watchdog, and the ip_local_reserved_ports.  Refer to watchdog_cpumask
and ip_local_reserved_ports in Documentation for further details on
these.  When you input a large buffer into these, when it is larger than
PAGE_SIZE- 1, the input data gets misparsed, and the user get
incorrectly informed that the desired input value was set.  This commit
implements a test which mimics and exploits that use case, it uses a
bitmap size, as in the watchdog case.  The bitmap is used to test the
bitmap proc handler, proc_do_large_bitmap().

The next commit fixes this issue.

[akpm@linux-foundation.org: move proc_do_large_bitmap() export to EOF]
[mcgrof@kernel.org: use new target description for backward compatibility]
[mcgrof@kernel.org: augment test number to 50, ran into issues with bash string comparisons when testing up to 50 cases.]
[mcgrof@kernel.org: introduce and use verify_diff_proc_file() to use diff]
[mcgrof@kernel.org: use mktemp for tmp file]
[mcgrof@kernel.org: merge shell test and C code]
[mcgrof@kernel.org: commit log love]
[mcgrof@kernel.org: export proc_do_large_bitmap() to allow for the test
[mcgrof@kernel.org: check for the return value when writing to the proc file]
Link: http://lkml.kernel.org/r/20190320222831.8243-6-mcgrof@kernel.org
Signed-off-by: Eric Sandeen 
Signed-off-by: Luis Chamberlain 
Acked-by: Kees Cook 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

test_sysctl: test against int proc_dointvec() array support

2017-07-12T23:26:00+00:00

Add a few initial respective tests for an array:

  o Echoing values separated by spaces works
  o Echoing only first elements will set first elements
  o Confirm PAGE_SIZE limit still applies even if an array is used

Link: http://lkml.kernel.org/r/20170630224431.17374-7-mcgrof@kernel.org
Signed-off-by: Luis R. Rodriguez 
Cc: Kees Cook 
Cc: "Eric W. Biederman" 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

test_sysctl: add simple proc_douintvec() case

2017-07-12T23:26:00+00:00

Test against a simple proc_douintvec() case.  While at it, add a test
against UINT_MAX.  Make sure UINT_MAX works, and UINT_MAX+1 will fail
and that negative values are not accepted.

Link: http://lkml.kernel.org/r/20170630224431.17374-6-mcgrof@kernel.org
Signed-off-by: Luis R. Rodriguez 
Cc: Kees Cook 
Cc: "Eric W. Biederman" 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

test_sysctl: add simple proc_dointvec() case

2017-07-12T23:26:00+00:00

Test against a simple proc_dointvec() case.  While at it, add a test
against INT_MAX.  Make sure INT_MAX works, and INT_MAX+1 will fail.
Also test negative values work.

Link: http://lkml.kernel.org/r/20170630224431.17374-5-mcgrof@kernel.org
Signed-off-by: Luis R. Rodriguez 
Cc: Kees Cook 
Cc: "Eric W. Biederman" 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

test_sysctl: add dedicated proc sysctl test driver

2017-07-12T23:26:00+00:00

The existing tools/testing/selftests/sysctl/ tests include two test
cases, but these use existing production kernel sysctl interfaces.  We
want to expand test coverage but we can't just be looking for random
safe production values to poke at, that's just insane!

Instead just dedicate a test driver for debugging purposes and port the
existing scripts to use it.  This will make it easier for further tests
to be added.

Subsequent patches will extend our test coverage for sysctl.

The stress test driver uses a new license (GPL on Linux, copyleft-next
outside of Linux).  Linus was fine with this [0] and later due to Ted's
and Alans's request ironed out an "or" language clause to use [1] which
is already present upstream.

[0] https://lkml.kernel.org/r/CA+55aFyhxcvD+q7tp+-yrSFDKfR0mOHgyEAe=f_94aKLsOu0Og@mail.gmail.com
[1] https://lkml.kernel.org/r/1495234558.7848.122.camel@linux.intel.com

Link: http://lkml.kernel.org/r/20170630224431.17374-2-mcgrof@kernel.org
Signed-off-by: Luis R. Rodriguez 
Acked-by: Kees Cook 
Cc: "Eric W. Biederman" 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds