diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2019-12-15 01:09:03 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-05 14:18:13 +0000 |
| commit | 08e4a312439c294b9753166537baf3cc0bd6bb07 (patch) | |
| tree | 85af38113f69ad3674d53f97b880fd7dad96f0f7 /mm | |
| parent | 64700ad97eab8b533afd5dbfff22266b68900e35 (diff) | |
ext4: validate the debug_want_extra_isize mount option at parse time
commit 9803387c55f7d2ce69aa64340c5fdc6b3027dbc8 upstream.
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: Theodore Ts'o <tytso@mit.edu>
Reported-and-tested-by: syzbot+4a39a025912b265cacef@syzkaller.appspotmail.com
Signed-off-by: Zubin Mithra <zsm@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions