diff options
| author | Vivek Goyal <vgoyal@redhat.com> | 2020-12-11 09:25:44 -0500 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2020-12-18 10:08:24 +0000 |
| commit | 31a4990f8df0be78b4310b18c6b16612ca03cf04 (patch) | |
| tree | da8fa68580aee117a37e70f138f623ca8b053ae7 /tools/virtiofsd | |
| parent | e7e8aa8aead2874f789a5d4a84cddb9b099fbd1c (diff) | |
virtiofsd: Check file type in lo_flush()
Currently lo_flush() is written in such a way that it expects to receive
a FLUSH requests on a regular file (and not directories). For example,
we call lo_fi_fd() which searches lo->fd_map. If we open directories
using opendir(), we keep don't keep track of these in lo->fd_map instead
we keep them in lo->dir_map. So we expect lo_flush() to be called on
regular files only.
Even linux fuse client calls FLUSH only for regular files and not
directories. So put a check for filetype and return EBADF if
lo_flush() is called on a non-regular file.
Reported-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Message-Id: <20201211142544.GB3285@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'tools/virtiofsd')
| -rw-r--r-- | tools/virtiofsd/passthrough_ll.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c index 4f805cbb82..b00be648d3 100644 --- a/tools/virtiofsd/passthrough_ll.c +++ b/tools/virtiofsd/passthrough_ll.c @@ -1961,6 +1961,12 @@ static void lo_flush(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi) return; } + if (!S_ISREG(inode->filetype)) { + lo_inode_put(lo, &inode); + fuse_reply_err(req, EBADF); + return; + } + /* An fd is going away. Cleanup associated posix locks */ if (lo->posix_lock) { pthread_mutex_lock(&inode->plock_mutex); |