As described in patch 2, our current kasan implementation is intricate, so I tried to simplify the implementation and mimic what arm64/x86 are doing. In addition it fixes UEFI bootflow with a kasan kernel and kasan inline instrumentation: all kasan configurations were tested on a large ubuntu kernel with success with KASAN_KUNIT_TEST and KASAN_MODULE_TEST. inline ubuntu config + uefi: sv39: OK sv48: OK sv57: OK outline ubuntu config + uefi: sv39: OK sv48: OK sv57: OK Actually 1 test always fails with KASAN_KUNIT_TEST that I have to check: # kasan_bitops_generic: EXPECTATION FAILED at mm/kasan/kasan__test.c:1020 KASAN failure expected in "set_bit(nr, addr)", but none occurrred Note that Palmer recently proposed to remove COMMAND_LINE_SIZE from the userspace abi https://lore.kernel.org/lkml/20221211061358.28035-1-palmer@xxxxxxxxxxxx/T/ so that we can finally increase the command line to fit all kasan kernel parameters. All of this should hopefully fix the syzkaller riscv build that has been failing for a few months now, any test is appreciated and if I can help in any way, please ask. v3: - Add AB from Ard in patch 4, thanks - Fix checkpatch issues in patch 1, thanks Conor v2: - Rebase on top of v6.2-rc3 - patch 4 is now way simpler than it used to be since Ard already moved the string functions into the efistub. Alexandre Ghiti (6): riscv: Split early and final KASAN population functions riscv: Rework kasan population functions riscv: Move DTB_EARLY_BASE_VA to the kernel address space riscv: Fix EFI stub usage of KASAN instrumented strcmp function riscv: Fix ptdump when KASAN is enabled riscv: Unconditionnally select KASAN_VMALLOC if KASAN arch/riscv/Kconfig | 1 + arch/riscv/kernel/image-vars.h | 2 - arch/riscv/mm/init.c | 2 +- arch/riscv/mm/kasan_init.c | 516 ++++++++++++++++++--------------- arch/riscv/mm/ptdump.c | 24 +- 5 files changed, 298 insertions(+), 247 deletions(-) -- 2.37.2
