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 PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sun, 10 Jan 2021 11:53:50 +0000 From: Alexander Lobakin <alobakin@...me> To: Thomas Bogendoerfer <tsbogend@...ha.franken.de> Cc: Arnd Bergmann <arnd@...db.de>, Nathan Chancellor <natechancellor@...il.com>, Nick Desaulniers <ndesaulniers@...gle.com>, Huacai Chen <chenhuacai@...nel.org>, Pei Huang <huangpei@...ngson.cn>, Kees Cook <keescook@...omium.org>, Alexander Lobakin <alobakin@...me>, Fangrui Song <maskray@...gle.com>, Jiaxun Yang <jiaxun.yang@...goat.com>, Ralf Baechle <ralf@...ux-mips.org>, Corey Minyard <cminyard@...sta.com>, linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org, stable@...r.kernel.org, clang-built-linux@...glegroups.com Subject: [PATCH v5 mips-next 0/9] MIPS: vmlinux.lds.S sections fixes & cleanup This series hunts the problems discovered after manual enabling of ARCH_WANT_LD_ORPHAN_WARN. Notably: - adds the missing PAGE_ALIGNED_DATA() section affecting VDSO placement (marked for stable); - stops blind catching of orphan text sections with .text.* directive; - properly stops .eh_frame section generation. Compile and runtime tested on MIPS32R2 CPS board with no issues using two different toolkits: - Binutils 2.35.1, GCC 10.2.1 (with Alpine patches); - LLVM stack: 11.0.0 and from latest Git snapshot. Since v4 [3]: - new: drop redundant .text.cps-vec creation and blind inclusion of orphan text sections via .text.* directive in vmlinux.lds.S; - don't assert SIZEOF(.rel.dyn) as it's reported that it may be not empty on certain machines and compilers (Thomas); - align GOT table like it's done for ARM64; - new: catch UBSAN's "unnamed data" sections in generic definitions when building with LD_DEAD_CODE_DATA_ELIMINATION; - collect Reviewed-bys (Kees, Nathan). Since v3 [2]: - fix the third patch as GNU stack emits .rel.dyn into VDSO for some reason if .cfi_sections is specified. Since v2 [1]: - stop discarding .eh_frame and just prevent it from generating (Kees); - drop redundant sections assertions (Fangrui); - place GOT table in .text instead of asserting as it's not empty when building with LLVM (Nathan); - catch compound literals in generic definitions when building with LD_DEAD_CODE_DATA_ELIMINATION (Kees); - collect two Reviewed-bys (Kees). Since v1 [0]: - catch .got entries too as LLD may produce it (Nathan); - check for unwanted sections to be zero-sized instead of discarding (Fangrui). [0] https://lore.kernel.org/linux-mips/20210104121729.46981-1-alobakin@pm.me [1] https://lore.kernel.org/linux-mips/20210106200713.31840-1-alobakin@pm.me [2] https://lore.kernel.org/linux-mips/20210107115120.281008-1-alobakin@pm.me [3] https://lore.kernel.org/linux-mips/20210107123331.354075-1-alobakin@pm.me Alexander Lobakin (9): MIPS: vmlinux.lds.S: add missing PAGE_ALIGNED_DATA() section MIPS: CPS: don't create redundant .text.cps-vec section MIPS: vmlinux.lds.S: add ".gnu.attributes" to DISCARDS MIPS: properly stop .eh_frame generation MIPS: vmlinux.lds.S: explicitly catch .rel.dyn symbols MIPS: vmlinux.lds.S: explicitly declare .got table vmlinux.lds.h: catch compound literals into data and BSS vmlinux.lds.h: catch UBSAN's "unnamed data" into data MIPS: select ARCH_WANT_LD_ORPHAN_WARN arch/mips/Kconfig | 1 + arch/mips/include/asm/asm.h | 18 ++++++++++++++++++ arch/mips/kernel/cps-vec.S | 1 - arch/mips/kernel/vmlinux.lds.S | 11 +++++++++-- include/asm-generic/vmlinux.lds.h | 6 +++--- 5 files changed, 31 insertions(+), 6 deletions(-) -- 2.30.0
Powered by blists - more mailing lists