The patch titled
Subject: kfence: test: fail fast if disabled at boot
has been added to the -mm tree. Its filename is
kfence-test-fail-fast-if-disabled-at-boot.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/kfence-test-fail-fast-if-disabled-at-boot.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/kfence-test-fail-fast-if-disabled-at-boot.patch
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The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Marco Elver <elver@xxxxxxxxxx>
Subject: kfence: test: fail fast if disabled at boot
Fail kfence_test fast if KFENCE was disabled at boot, instead of each test
case trying several seconds to allocate from KFENCE and failing. KUnit
will fail all test cases if kunit_suite::init returns an error.
Even if KFENCE was disabled, we still want the test to fail, so that CI
systems that parse KUnit output will alert on KFENCE being disabled
(accidentally or otherwise).
Link: https://lkml.kernel.org/r/20210825105533.1247922-1-elver@xxxxxxxxxx
Signed-off-by: Marco Elver <elver@xxxxxxxxxx>
Reported-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Tested-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Acked-by: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kfence/kfence_test.c | 3 +++
1 file changed, 3 insertions(+)
--- a/mm/kfence/kfence_test.c~kfence-test-fail-fast-if-disabled-at-boot
+++ a/mm/kfence/kfence_test.c
@@ -800,6 +800,9 @@ static int test_init(struct kunit *test)
unsigned long flags;
int i;
+ if (!__kfence_pool)
+ return -EINVAL;
+
spin_lock_irqsave(&observed.lock, flags);
for (i = 0; i < ARRAY_SIZE(observed.lines); i++)
observed.lines[i][0] = '\0';
_
Patches currently in -mm which might be from elver@xxxxxxxxxx are
kfence-show-cpu-and-timestamp-in-alloc-free-info.patch
kfence-test-fail-fast-if-disabled-at-boot.patch
