linux-kernel - [PATCH v4 RESEND 0/2] fs/binfmt_elf: Fix AT

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Date:   Fri,  7 Jan 2022 08:25:11 +0900
From:   Akira Kawata <akirakawata1@...il.com>
To:     akpm@...ux-foundation.org, adobriyan@...il.com,
        viro@...iv.linux.org.uk, keescook@...omium.org,
        linux-fsdevel@...r.kernel.org, lukas.bulwahn@...il.com
Cc:     akirakawata1@...il.com, Eric Biederman <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 RESEND 0/2] fs/binfmt_elf: Fix AT_PHDR for unusual ELF files

 These patches fix a bug in AT_PHDR calculation. 
 
 We cannot calculate AT_PHDR as the sum of load_addr and exec->e_phoff.
 This is because exec->e_phoff is the offset of PHDRs in the file and the
 address of PHDRs in the memory may differ from it. These patches fix the
 bug by calculating the address of program headers from PT_LOADs
 directly.
 
 Sorry for my latency.
 
 Changes in v4
 - Reflecting comments from Lukas, add a refactoring commit.
 
 Changes in v3:
 - Fix a reported bug from kernel test robot.
 
 Changes in v2:
 - Remove unused load_addr from create_elf_tables.
 - Improve the commit message. *** SUBJECT HERE ***

Akira Kawata (2):
  fs/binfmt_elf: Fix AT_PHDR for unusual ELF files
  fs/binfmt_elf: Refactor load_elf_binary function

 fs/binfmt_elf.c | 36 +++++++++++++++++++++---------------
 1 file changed, 21 insertions(+), 15 deletions(-)


base-commit: 4eee8d0b64ecc3231040fa68ba750317ffca5c52
-- 
2.25.1