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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2018-05-01 13:12:14 +0900 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2018-05-31 12:26:11 +0200 |
| commit | 543b8f8662fe6d21f19958b666ab0051af9db21a (patch) | |
| tree | 4e880da0dfdcdcaeb34e992749529e29f061c631 /include/net/compat.h | |
| parent | 6becdb601bae2a043d7fb9762c4d48699528ea6e (diff) | |
| download | op-kernel-dev-543b8f8662fe6d21f19958b666ab0051af9db21a.zip op-kernel-dev-543b8f8662fe6d21f19958b666ab0051af9db21a.tar.gz | |
fuse: don't keep dead fuse_conn at fuse_fill_super().
syzbot is reporting use-after-free at fuse_kill_sb_blk() [1].
Since sb->s_fs_info field is not cleared after fc was released by
fuse_conn_put() when initialization failed, fuse_kill_sb_blk() finds
already released fc and tries to hold the lock. Fix this by clearing
sb->s_fs_info field after calling fuse_conn_put().
[1] https://syzkaller.appspot.com/bug?id=a07a680ed0a9290585ca424546860464dd9658db
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+ec3986119086fe4eec97@syzkaller.appspotmail.com>
Fixes: 3b463ae0c626 ("fuse: invalidation reverse calls")
Cc: John Muir <john@jmuir.com>
Cc: Csaba Henk <csaba@gluster.com>
Cc: Anand Avati <avati@redhat.com>
Cc: <stable@vger.kernel.org> # v2.6.31
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'include/net/compat.h')
0 files changed, 0 insertions, 0 deletions
