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Message-Id: <20230929031716.it.155-kees@kernel.org> Date: Thu, 28 Sep 2023 20:24:28 -0700 From: Kees Cook <keescook@...omium.org> To: Eric Biederman <ebiederm@...ssion.com> Cc: Kees Cook <keescook@...omium.org>, Sebastian Ott <sebott@...hat.com>, Thomas Weißschuh <linux@...ssschuh.net>, Pedro Falcato <pedro.falcato@...il.com>, Al Viro <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, linux-hardening@...r.kernel.org Subject: [PATCH v4 0/6] binfmt_elf: Support segments with 0 filesz and misaligned starts Hi, This is the continuation of the work Eric started for handling "p_memsz > p_filesz" in arbitrary segments (rather than just the last, BSS, segment). I've added the suggested changes: - drop unused "elf_bss" variable - refactor load_elf_interp() to use elf_load() - refactor load_elf_library() to use elf_load() - report padzero() errors when PROT_WRITE is present - drop vm_brk() Thanks! -Kees v4: - refactor load_elf_library() too - don't refactor padzero(), just test in the only remaining caller - drop now-unused vm_brk() v3: https://lore.kernel.org/all/20230927033634.make.602-kees@kernel.org v2: https://lore.kernel.org/lkml/87sf71f123.fsf@email.froward.int.ebiederm.org v1: https://lore.kernel.org/lkml/87jzsemmsd.fsf_-_@email.froward.int.ebiederm.org Eric W. Biederman (1): binfmt_elf: Support segments with 0 filesz and misaligned starts Kees Cook (5): binfmt_elf: elf_bss no longer used by load_elf_binary() binfmt_elf: Use elf_load() for interpreter binfmt_elf: Use elf_load() for library binfmt_elf: Only report padzero() errors when PROT_WRITE mm: Remove unused vm_brk() fs/binfmt_elf.c | 214 ++++++++++++++++----------------------------- include/linux/mm.h | 3 +- mm/mmap.c | 6 -- mm/nommu.c | 5 -- 4 files changed, 76 insertions(+), 152 deletions(-) -- 2.34.1
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