* [PATCH] lib/test_bitmap.c: Fix bitmap optimisation tests to report errors correctly
@ 2018-05-09 11:43 Michael Ellerman
2018-05-09 17:16 ` Kees Cook
2018-05-09 22:59 ` Andrew Morton
0 siblings, 2 replies; 5+ messages in thread
From: Michael Ellerman @ 2018-05-09 11:43 UTC (permalink / raw)
To: akpm
Cc: linux-kernel, mawilcox, ynorov, andriy.shevchenko, geert,
keescook, torvalds
From: Matthew Wilcox <mawilcox@microsoft.com>
I had neglected to increment the error counter when the tests failed,
which made the tests noisy when they fail, but not actually return an
error code.
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Fixes: 3cc78125a081 ("lib/test_bitmap.c: add optimisation tests")
Cc: stable@vger.kernel.org # v4.13+
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
---
lib/test_bitmap.c | 21 +++++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)
We noticed this a while back but the patch got lost.
Andrew are you happy to take it?
cheers
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index de16f7869fb1..6cd7d0740005 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -331,23 +331,32 @@ static void noinline __init test_mem_optimisations(void)
unsigned int start, nbits;
for (start = 0; start < 1024; start += 8) {
- memset(bmap1, 0x5a, sizeof(bmap1));
- memset(bmap2, 0x5a, sizeof(bmap2));
for (nbits = 0; nbits < 1024 - start; nbits += 8) {
+ memset(bmap1, 0x5a, sizeof(bmap1));
+ memset(bmap2, 0x5a, sizeof(bmap2));
+
bitmap_set(bmap1, start, nbits);
__bitmap_set(bmap2, start, nbits);
- if (!bitmap_equal(bmap1, bmap2, 1024))
+ if (!bitmap_equal(bmap1, bmap2, 1024)) {
printk("set not equal %d %d\n", start, nbits);
- if (!__bitmap_equal(bmap1, bmap2, 1024))
+ failed_tests++;
+ }
+ if (!__bitmap_equal(bmap1, bmap2, 1024)) {
printk("set not __equal %d %d\n", start, nbits);
+ failed_tests++;
+ }
bitmap_clear(bmap1, start, nbits);
__bitmap_clear(bmap2, start, nbits);
- if (!bitmap_equal(bmap1, bmap2, 1024))
+ if (!bitmap_equal(bmap1, bmap2, 1024)) {
printk("clear not equal %d %d\n", start, nbits);
- if (!__bitmap_equal(bmap1, bmap2, 1024))
+ failed_tests++;
+ }
+ if (!__bitmap_equal(bmap1, bmap2, 1024)) {
printk("clear not __equal %d %d\n", start,
nbits);
+ failed_tests++;
+ }
}
}
}
--
2.14.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] lib/test_bitmap.c: Fix bitmap optimisation tests to report errors correctly
2018-05-09 11:43 [PATCH] lib/test_bitmap.c: Fix bitmap optimisation tests to report errors correctly Michael Ellerman
@ 2018-05-09 17:16 ` Kees Cook
2018-05-11 13:47 ` Michael Ellerman
2018-05-09 22:59 ` Andrew Morton
1 sibling, 1 reply; 5+ messages in thread
From: Kees Cook @ 2018-05-09 17:16 UTC (permalink / raw)
To: Michael Ellerman
Cc: Andrew Morton, LKML, Matthew Wilcox, Yury Norov, Andy Shevchenko,
Geert Uytterhoeven, Linus Torvalds
On Wed, May 9, 2018 at 4:43 AM, Michael Ellerman <mpe@ellerman.id.au> wrote:
> From: Matthew Wilcox <mawilcox@microsoft.com>
>
> I had neglected to increment the error counter when the tests failed,
> which made the tests noisy when they fail, but not actually return an
> error code.
>
> Reported-by: Michael Ellerman <mpe@ellerman.id.au>
> Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
> Fixes: 3cc78125a081 ("lib/test_bitmap.c: add optimisation tests")
> Cc: stable@vger.kernel.org # v4.13+
> Tested-by: Michael Ellerman <mpe@ellerman.id.au>
FWIW:
Reviewed-by: Kees Cook <keescook@chromium.org>
-Kees
> ---
> lib/test_bitmap.c | 21 +++++++++++++++------
> 1 file changed, 15 insertions(+), 6 deletions(-)
>
> We noticed this a while back but the patch got lost.
>
> Andrew are you happy to take it?
>
> cheers
>
>
> diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
> index de16f7869fb1..6cd7d0740005 100644
> --- a/lib/test_bitmap.c
> +++ b/lib/test_bitmap.c
> @@ -331,23 +331,32 @@ static void noinline __init test_mem_optimisations(void)
> unsigned int start, nbits;
>
> for (start = 0; start < 1024; start += 8) {
> - memset(bmap1, 0x5a, sizeof(bmap1));
> - memset(bmap2, 0x5a, sizeof(bmap2));
> for (nbits = 0; nbits < 1024 - start; nbits += 8) {
> + memset(bmap1, 0x5a, sizeof(bmap1));
> + memset(bmap2, 0x5a, sizeof(bmap2));
> +
> bitmap_set(bmap1, start, nbits);
> __bitmap_set(bmap2, start, nbits);
> - if (!bitmap_equal(bmap1, bmap2, 1024))
> + if (!bitmap_equal(bmap1, bmap2, 1024)) {
> printk("set not equal %d %d\n", start, nbits);
> - if (!__bitmap_equal(bmap1, bmap2, 1024))
> + failed_tests++;
> + }
> + if (!__bitmap_equal(bmap1, bmap2, 1024)) {
> printk("set not __equal %d %d\n", start, nbits);
> + failed_tests++;
> + }
>
> bitmap_clear(bmap1, start, nbits);
> __bitmap_clear(bmap2, start, nbits);
> - if (!bitmap_equal(bmap1, bmap2, 1024))
> + if (!bitmap_equal(bmap1, bmap2, 1024)) {
> printk("clear not equal %d %d\n", start, nbits);
> - if (!__bitmap_equal(bmap1, bmap2, 1024))
> + failed_tests++;
> + }
> + if (!__bitmap_equal(bmap1, bmap2, 1024)) {
> printk("clear not __equal %d %d\n", start,
> nbits);
> + failed_tests++;
> + }
> }
> }
> }
> --
> 2.14.1
>
--
Kees Cook
Pixel Security
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] lib/test_bitmap.c: Fix bitmap optimisation tests to report errors correctly
2018-05-09 11:43 [PATCH] lib/test_bitmap.c: Fix bitmap optimisation tests to report errors correctly Michael Ellerman
2018-05-09 17:16 ` Kees Cook
@ 2018-05-09 22:59 ` Andrew Morton
2018-05-11 13:48 ` Michael Ellerman
1 sibling, 1 reply; 5+ messages in thread
From: Andrew Morton @ 2018-05-09 22:59 UTC (permalink / raw)
To: Michael Ellerman
Cc: linux-kernel, mawilcox, ynorov, andriy.shevchenko, geert,
keescook, torvalds
On Wed, 9 May 2018 21:43:28 +1000 Michael Ellerman <mpe@ellerman.id.au> wrote:
> From: Matthew Wilcox <mawilcox@microsoft.com>
>
> I had neglected to increment the error counter when the tests failed,
> which made the tests noisy when they fail, but not actually return an
> error code.
>
> Reported-by: Michael Ellerman <mpe@ellerman.id.au>
> Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
> Fixes: 3cc78125a081 ("lib/test_bitmap.c: add optimisation tests")
> Cc: stable@vger.kernel.org # v4.13+
> Tested-by: Michael Ellerman <mpe@ellerman.id.au>
I'll add your SOB to my copy of this, as you were on the patch delivery path.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] lib/test_bitmap.c: Fix bitmap optimisation tests to report errors correctly
2018-05-09 17:16 ` Kees Cook
@ 2018-05-11 13:47 ` Michael Ellerman
0 siblings, 0 replies; 5+ messages in thread
From: Michael Ellerman @ 2018-05-11 13:47 UTC (permalink / raw)
To: Kees Cook
Cc: Andrew Morton, LKML, Matthew Wilcox, Yury Norov, Andy Shevchenko,
Geert Uytterhoeven, Linus Torvalds
Kees Cook <keescook@chromium.org> writes:
> On Wed, May 9, 2018 at 4:43 AM, Michael Ellerman <mpe@ellerman.id.au> wrote:
>> From: Matthew Wilcox <mawilcox@microsoft.com>
>>
>> I had neglected to increment the error counter when the tests failed,
>> which made the tests noisy when they fail, but not actually return an
>> error code.
>>
>> Reported-by: Michael Ellerman <mpe@ellerman.id.au>
>> Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
>> Fixes: 3cc78125a081 ("lib/test_bitmap.c: add optimisation tests")
>> Cc: stable@vger.kernel.org # v4.13+
>> Tested-by: Michael Ellerman <mpe@ellerman.id.au>
>
> FWIW:
>
> Reviewed-by: Kees Cook <keescook@chromium.org>
Thanks.
cheers
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] lib/test_bitmap.c: Fix bitmap optimisation tests to report errors correctly
2018-05-09 22:59 ` Andrew Morton
@ 2018-05-11 13:48 ` Michael Ellerman
0 siblings, 0 replies; 5+ messages in thread
From: Michael Ellerman @ 2018-05-11 13:48 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-kernel, mawilcox, ynorov, andriy.shevchenko, geert,
keescook, torvalds
Andrew Morton <akpm@linux-foundation.org> writes:
> On Wed, 9 May 2018 21:43:28 +1000 Michael Ellerman <mpe@ellerman.id.au> wrote:
>> From: Matthew Wilcox <mawilcox@microsoft.com>
>>
>> I had neglected to increment the error counter when the tests failed,
>> which made the tests noisy when they fail, but not actually return an
>> error code.
>>
>> Reported-by: Michael Ellerman <mpe@ellerman.id.au>
>> Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
>> Fixes: 3cc78125a081 ("lib/test_bitmap.c: add optimisation tests")
>> Cc: stable@vger.kernel.org # v4.13+
>> Tested-by: Michael Ellerman <mpe@ellerman.id.au>
>
> I'll add your SOB to my copy of this, as you were on the patch delivery path.
Ah yep, I wasn't on the original delivery path, but you're right I am now.
Thanks for fixing it up.
cheers
^ permalink raw reply [flat|nested] 5+ messages in thread
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2018-05-09 11:43 [PATCH] lib/test_bitmap.c: Fix bitmap optimisation tests to report errors correctly Michael Ellerman
2018-05-09 17:16 ` Kees Cook
2018-05-11 13:47 ` Michael Ellerman
2018-05-09 22:59 ` Andrew Morton
2018-05-11 13:48 ` Michael Ellerman
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