linux-stable/fs/fat
OGAWA Hirofumi 0fd0bb0dfe fat: don't allow to mount if the FAT length == 0
commit b1b65750b8 upstream.

If FAT length == 0, the image doesn't have any data. And it can be the
cause of overlapping the root dir and FAT entries.

Also Windows treats it as invalid format.

Reported-by: syzbot+6f1624f937d9d6911e2d@syzkaller.appspotmail.com
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Marco Elver <elver@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Link: http://lkml.kernel.org/r/87r1wz8mrd.fsf@mail.parknet.co.jp
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-06-20 10:25:05 +02:00
..
cache.c fat: validate ->i_start before using 2018-09-15 09:45:27 +02:00
dir.c fat: work around race with userspace's read via blockdev while mounting 2019-10-07 18:55:12 +02:00
fat.h fat: validate ->i_start before using 2018-09-15 09:45:27 +02:00
fatent.c fat: work around race with userspace's read via blockdev while mounting 2019-10-07 18:55:12 +02:00
file.c fs/fat/file.c: issue flush after the writeback of FAT 2019-06-15 11:54:51 +02:00
inode.c fat: don't allow to mount if the FAT length == 0 2020-06-20 10:25:05 +02:00
Kconfig fat: add config option to set UTF-8 mount option by default 2016-03-22 15:36:02 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
misc.c VFS: Convert sb->s_flags & MS_RDONLY to sb_rdonly(sb) 2017-07-17 08:45:34 +01:00
namei_msdos.c Merge remote-tracking branch 'ovl/rename2' into for-linus 2016-10-10 23:02:51 -04:00
namei_vfat.c vfat: deduplicate hex2bin() 2017-09-08 18:26:50 -07:00
nfs.c