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test_sysctl: add simple proc_dointvec() case

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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 <mcgrof@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Luis R. Rodriguez
2017-07-12 14:33:52 -07:00
committed by Linus Torvalds
parent 1c0357c846
commit eb965eda1c
2 changed files with 73 additions and 0 deletions
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11
lib/test_sysctl.c
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@@ -41,11 +41,15 @@ static int i_one_hundred = 100;
struct test_sysctl_data {
int int_0001;
int int_0002;
char string_0001[65];
};
static struct test_sysctl_data test_data = {
.int_0001 = 60,
.int_0002 = 1,
.string_0001 = "(none)",
};
@@ -60,6 +64,13 @@ static struct ctl_table test_table[] = {
.extra1 = &i_zero,
.extra2 = &i_one_hundred,
},
{
.procname = "int_0002",
.data = &test_data.int_0002,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "string_0001",
.data = &test_data.string_0001,