linux-kernel - [PATCH v1 0/3] RISC-V: Fix a few kexec_file

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <cover.1690274483.git.petr.tesarik.ext@huawei.com>
Date:   Tue, 25 Jul 2023 10:44:24 +0200
From:   Petr Tesarik <petrtesarik@...weicloud.com>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Li Huafei <lihuafei1@...wei.com>,
        Liao Chang <liaochang1@...wei.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Alyssa Ross <hi@...ssa.is>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Ricardo Ribalda <ribalda@...omium.org>,
        Kees Cook <keescook@...omium.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Li Zhengyu <lizhengyu3@...wei.com>,
        linux-riscv@...ts.infradead.org (open list:RISC-V ARCHITECTURE),
        linux-kernel@...r.kernel.org (open list)
Cc:     Roberto Sassu <roberto.sassu@...weicloud.com>, petr@...arici.cz
Subject: [PATCH v1 0/3] RISC-V: Fix a few kexec_file_load(2) failures

From: Petr Tesarik <petr.tesarik.ext@...wei.com>

The kexec_file_load(2) syscall does not work at least in some kernel
builds. For details see the relevant section in this blog post:

https://sigillatum.tesarici.cz/2023-07-21-state-of-riscv64-kdump.html

This patch series handles additional relocation types and removes the need
to implement a Global Offset Table (GOT) for the purgatory.

Petr Tesarik (2):
  riscv/kexec: handle R_RISCV_ADD16 and R_RISCV_SUB16 relocation types
  riscv/purgatory: do not link with string.o

Torsten Duwe (1):
  riscv/kexec: handle R_RISCV_CALL_PLT relocation type

 arch/riscv/kernel/elf_kexec.c | 7 +++++++
 arch/riscv/purgatory/Makefile | 9 +--------
 2 files changed, 8 insertions(+), 8 deletions(-)

-- 
2.25.1