Jan Kara 64847df5bf ext2: Fix underflow in ext2_max_size() ...

commit 1c2d14212b upstream.

When ext2 filesystem is created with 64k block size, ext2_max_size()
will return value less than 0. Also, we cannot write any file in this fs
since the sb->maxbytes is less than 0. The core of the problem is that
the size of block index tree for such large block size is more than
i_blocks can carry. So fix the computation to count with this
possibility.

File size limits computed with the new function for the full range of
possible block sizes look like:

bits file_size
10     17247252480
11    275415851008
12   2196873666560
13   2197948973056
14   2198486220800
15   2198754754560
16   2198888906752

CC: stable@vger.kernel.org
Reported-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2019-03-23 08:44:36 +01:00

..

acl.c

ext2: Don't clear SGID when inheriting ACLs

2018-01-31 12:06:11 +01:00

acl.h

ext2/3/4: use generic posix ACL infrastructure

2014-01-25 23:58:19 -05:00

balloc.c

Ext2: remove the static function release_blocks to optimize the kernel

2013-02-07 16:44:56 +01:00

dir.c

pagemap.h: move dir_pages() over there

2015-06-23 18:02:00 -04:00

ext2.h

ext2: Add locking for DAX faults

2015-10-19 14:40:54 +02:00

file.c

ext2: Add locking for DAX faults

2015-10-19 14:40:54 +02:00

ialloc.c

ext2: Handle error from dquot_initalize()

2015-07-23 20:59:37 +02:00

inode.c

ext2: fix a block leak

2018-05-26 08:48:58 +02:00

ioctl.c

new helper: file_inode(file)

2013-02-22 23:31:31 -05:00

Kconfig

vfs,ext2: remove CONFIG_EXT2_FS_XIP and rename CONFIG_FS_XIP to CONFIG_FS_DAX

2015-02-16 17:56:04 -08:00

Makefile

ext2: remove xip.c and xip.h

2015-02-16 17:56:03 -08:00

namei.c

do d_instantiate/unlock_new_inode combinations safely

2018-05-30 07:48:52 +02:00

super.c

ext2: Fix underflow in ext2_max_size()

2019-03-23 08:44:36 +01:00

symlink.c

ext2: use simple_follow_link()

2015-05-10 22:18:21 -04:00

xattr_security.c

xattr handlers: Pass handler to operations instead of flags

2015-11-13 20:34:32 -05:00

xattr_trusted.c

xattr handlers: Pass handler to operations instead of flags

2015-11-13 20:34:32 -05:00

xattr_user.c

xattr handlers: Pass handler to operations instead of flags

2015-11-13 20:34:32 -05:00

xattr.c

ext2: fix potential use after free

2018-12-13 09:21:27 +01:00

xattr.h

ext2/3/4: use generic posix ACL infrastructure

2014-01-25 23:58:19 -05:00