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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2018-05-07 19:10:31 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-03 11:21:25 +0200 |
| commit | e05dd56499ab4e3597346b7dc5f1dfd5d1168d82 (patch) | |
| tree | 7360417f80bd549ea73079b758b8ed9074e31afd /fs/btrfs | |
| parent | f444af38dd73e073fb0bfda1c4ae7db648b4b499 (diff) | |
driver core: Don't ignore class_dir_create_and_add() failure.
commit 84d0c27d6233a9ba0578b20f5a09701eb66cee42 upstream.
syzbot is hitting WARN() at kernfs_add_one() [1].
This is because kernfs_create_link() is confused by previous device_add()
call which continued without setting dev->kobj.parent field when
get_device_parent() failed by memory allocation fault injection.
Fix this by propagating the error from class_dir_create_and_add() to
the calllers of get_device_parent().
[1] https://syzkaller.appspot.com/bug?id=fae0fb607989ea744526d1c082a5b8de6529116f
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+df47f81c226b31d89fb1@syzkaller.appspotmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/btrfs')
0 files changed, 0 insertions, 0 deletions