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test_sysctl: add simple proc_douintvec() case

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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 <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 14:33:55 -07:00
committed by Linus Torvalds
parent eb965eda1c
commit 2920fad3a5
2 changed files with 74 additions and 0 deletions
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11
lib/test_sysctl.c
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@@ -43,6 +43,8 @@ struct test_sysctl_data {
int int_0001;
int int_0002;
unsigned int uint_0001;
char string_0001[65];
};
@@ -50,6 +52,8 @@ static struct test_sysctl_data test_data = {
.int_0001 = 60,
.int_0002 = 1,
.uint_0001 = 314,
.string_0001 = "(none)",
};
@@ -71,6 +75,13 @@ static struct ctl_table test_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "uint_0001",
.data = &test_data.uint_0001,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_douintvec,
},
{
.procname = "string_0001",
.data = &test_data.string_0001,