linux-kernel - [PATCH 0/6] fs/minix: fix syzbot bugs and set s

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Message-Id: <20200628060846.682158-1-ebiggers@kernel.org>
Date:   Sat, 27 Jun 2020 23:08:39 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     linux-fsdevel@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Qiujun Huang <hqjagain@...il.com>
Subject: [PATCH 0/6] fs/minix: fix syzbot bugs and set s_maxbytes

This series fixes all syzbot bugs in the minix filesystem:

	KASAN: null-ptr-deref Write in get_block
	KASAN: use-after-free Write in get_block
	KASAN: use-after-free Read in get_block
	WARNING in inc_nlink
	KMSAN: uninit-value in get_block
	WARNING in drop_nlink

It also fixes the minix filesystem to set s_maxbytes correctly, so that
userspace sees the correct behavior when exceeding the max file size.

Al or Andrew: one of you will need to take these patches, since no one
is maintaining this filesystem.


Eric Biggers (6):
  fs/minix: check return value of sb_getblk()
  fs/minix: don't allow getting deleted inodes
  fs/minix: reject too-large maximum file size
  fs/minix: set s_maxbytes correctly
  fs/minix: fix block limit check for V1 filesystems
  fs/minix: remove expected error message in block_to_path()

 fs/minix/inode.c        | 42 +++++++++++++++++++++++++++++++++++++----
 fs/minix/itree_common.c |  8 +++++++-
 fs/minix/itree_v1.c     | 12 ++++++------
 fs/minix/itree_v2.c     | 13 ++++++-------
 fs/minix/minix.h        |  1 -
 5 files changed, 57 insertions(+), 19 deletions(-)

-- 
2.27.0