linux-kernel - [PATCH 0/2] statfs: Enforce statfs[64] structure intialization

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Date:   Thu,  4 May 2023 16:40:19 +0200
From:   Ilya Leoshkevich <iii@...ux.ibm.com>
To:     Al Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Ilya Leoshkevich <iii@...ux.ibm.com>
Subject: [PATCH 0/2] statfs: Enforce statfs[64] structure intialization

This series fixes copying of uninitialized memory to userspace by
do_statfs_native() and do_statfs64() on s390.

Patch 1 fixes the problem by making the code similar to
put_compat_statfs() and put_compat_statfs64().

Patch 2 gets rid of the padding which caused the issue; even though it
may be considered redundant, it documents that s390 de-facto has an
extra f_spare array element.

Ilya Leoshkevich (2):
  statfs: Enforce statfs[64] structure intialization
  s390/uapi: Cover statfs padding by growing f_spare

 arch/s390/include/asm/compat.h      | 2 +-
 arch/s390/include/uapi/asm/statfs.h | 4 ++--
 fs/statfs.c                         | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

-- 
2.40.1