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BACKPORT: kfence: add test suite

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Add KFENCE test suite, testing various error detection scenarios. Makes
use of KUnit for test organization. Since KFENCE's interface to obtain
error reports is via the console, the test verifies that KFENCE outputs
expected reports to the console.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexander Potapenko <[email protected]>
Signed-off-by: Marco Elver <[email protected]>
Reviewed-by: Dmitry Vyukov <[email protected]>
Co-developed-by: Alexander Potapenko <[email protected]>
Reviewed-by: Jann Horn <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christopher Lameter <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Hillf Danton <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Joern Engel <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: SeongJae Park <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Bug: 177201466
(cherry picked from commit d6364119849bb0432e9a46e9699519ea9ff1bb77
    https://github.com/hnaz/linux-mm v5.11-rc4-mmots-2021-01-21-20-10)
[glider: removed memcg sanity checks from the tests]
Test: CONFIG_KFENCE_KUNIT_TEST=y passes on Cuttlefish
Signed-off-by: Alexander Potapenko <[email protected]>
Change-Id: I733090d4109a795c078fe8090c46b19cdfe9413f
This commit is contained in:
Marco Elver 2021-01-22 09:18:41 +00:00 • committed by Michael Bestas
commit f272e18c0d
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3 changed files with 831 additions and 0 deletions
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13
lib/Kconfig.kfence
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@ -66,4 +66,17 @@ config KFENCE_STRESS_TEST_FAULTS
Only for KFENCE testing; set to 0 if you are not a KFENCE developer.
config KFENCE_KUNIT_TEST
tristate "KFENCE integration test suite" if !KUNIT_ALL_TESTS
default KUNIT_ALL_TESTS
depends on TRACEPOINTS && KUNIT
help
Test suite for KFENCE, testing various error detection scenarios with
various allocation types, and checking that reports are correctly
output to console.
Say Y here if you want the test to be built into the kernel and run
during boot; say M if you want the test to build as a module; say N
if you are unsure.
endif # KFENCE