mkfs.f2fs: fix a segfault when setting more than 7 devices

[root@localhost f2fs-tools]# mkfs.f2fs -c /dev/sdb1 -c /dev/sdb1 -c /dev/sdb1 -c /dev/sdb1 -c /dev/sdb1 -c /dev/sdb1 -c /dev/sdb1 -c /dev/sdb1 -c /dev/sdb1 /dev/sdb1

kernel: mkfs.f2fs[9047]: segfault at 2b78a60f ip 0000000000401356 sp 00007fffde05c9c0 error 6 in mkfs.f2fs[400000+5000]

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
1 file changed