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Commit 9803387c authored by Theodore Ts'o's avatar Theodore Ts'o
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ext4: validate the debug_want_extra_isize mount option at parse time

Instead of setting s_want_extra_size and then making sure that it is a
valid value afterwards, validate the field before we set it.  This
avoids races and other problems when remounting the file system.

Link: https://lore.kernel.org/r/20191215063020.GA11512@mit.edu


Cc: stable@kernel.org
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
Reported-and-tested-by: default avatar <syzbot+4a39a025912b265cacef@syzkaller.appspotmail.com>
parent a70fd5ac
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