Re: [PATCH 0/4] Fix a segmentation fault also add raid6test for RISC-V support

From: Alexandre Ghiti
Date: Wed Jul 09 2025 - 11:19:58 EST


Hi Chunyan,

Patch 2 was merged via fixes, do you plan on resending a new version for 6.17 that takes into account Palmer's remarks?

Thanks,

Alex

On 6/10/25 12:12, Chunyan Zhang wrote:
The first two patches are fixes.
The last two are for userspace raid6test support on RISC-V.

The issue fixed in patch 2/4 was probably the same which was spotted by
Charlie [1], I couldn't reproduce it at that time.

When running raid6test in userspace on RISC-V, I saw a segmentation fault,
I used gdb command to print pointer p, it was an unaccessible address.

With patch 2/4, the issue didn't appear anymore.

[1] https://lore.kernel.org/lkml/Z5gJ35pXI2W41QDk@ghost/

Chunyan Zhang (4):
raid6: riscv: clean up unused header file inclusion
raid6: riscv: Fix NULL pointer dereference issue
raid6: riscv: Allow code to be compiled in userspace
raid6: test: add support for RISC-V

lib/raid6/recov_rvv.c | 9 +-----
lib/raid6/rvv.c | 62 +++++++++++++++++++++--------------------
lib/raid6/rvv.h | 15 ++++++++++
lib/raid6/test/Makefile | 8 ++++++
4 files changed, 56 insertions(+), 38 deletions(-)