Hi all,
This patchset adds KFENCE support on LoongArch.
To run the testcases, you will need to enable the following options,
-> Kernel hacking
[*] Tracers
[*] Support for tracing block IO actions (NEW)
-> Kernel Testing and Coverage
<*> KUnit - Enable support for unit tests
and then,
-> Kernel hacking
-> Memory Debugging
[*] KFENCE: low-overhead sampling-based memory safety error detector (NEW)
<*> KFENCE integration test suite (NEW)
With these options enabled, KFENCE will be tested during kernel startup.
And normally, you might get the following feedback,
========================================================
[ 35.326363 ] # kfence: pass:23 fail:0 skip:2 total:25
[ 35.326486 ] # Totals: pass:23 fail:0 skip:2 total:25
[ 35.326621 ] ok 1 kfence
========================================================
you might notice that 2 testcases have been skipped. If you tend to run
all testcases, please enable CONFIG_INIT_ON_FREE_DEFAULT_ON, you can
find it here,
-> Security options
-> Kernel hardening options
-> Memory initialization
[*] Enable heap memory zeroing on free by default
and you might get all testcases passed.
========================================================
[ 35.531860 ] # kfence: pass:25 fail:0 skip:0 total:25
[ 35.531999 ] # Totals: pass:25 fail:0 skip:0 total:25
[ 35.532135 ] ok 1 kfence
========================================================
v3:
* Address Huacai's comments.
* Fix a bug that Jackie Liu pointed out.
* Rewrite arch_stack_walk() with the suggestion of Jinyang He.
v2:
* Address Huacai's comments.
* Fix typos in commit message.
Thanks,
Enze
Enze Li (4):
KFENCE: Defer the assignment of the local variable addr
LoongArch: mm: Add page table mapped mode support
LoongArch: Get stack without NMI when providing regs parameter
LoongArch: Add KFENCE support
arch/loongarch/Kconfig | 1 +
arch/loongarch/include/asm/kfence.h | 66 ++++++++++++++++++++++++++++
arch/loongarch/include/asm/page.h | 8 +++-
arch/loongarch/include/asm/pgtable.h | 16 ++++++-
arch/loongarch/kernel/stacktrace.c | 18 ++++----
arch/loongarch/mm/fault.c | 22 ++++++----
arch/loongarch/mm/pgtable.c | 7 +++
mm/kfence/core.c | 5 ++-
8 files changed, 123 insertions(+), 20 deletions(-)
create mode 100644 arch/loongarch/include/asm/kfence.h
--
2.34.1
