On Tue, 2013-02-12 at 10:12 -0700, Tim Gardner wrote:
> smatch analysis:
>
> fs/autofs4/waitq.c:46 autofs4_catatonic_mode() info: redundant null
> check on wq->name.name calling kfree()
I'm not sure about this change.
autofs4_catatonic_mode() could be called when there are remaining
entries in the wait queue, which is nulled, so autofs4_wait_release()
won't see the the discarded waits if it is called.
>
> Cc: Ian Kent <ra...@themaw.net>
> Cc: aut...@vger.kernel.org
> Signed-off-by: Tim Gardner <tim.gard...@canonical.com>
> ---
> fs/autofs4/waitq.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
> index 03bc1d3..3db70da 100644
> --- a/fs/autofs4/waitq.c
> +++ b/fs/autofs4/waitq.c
> @@ -42,10 +42,8 @@ void autofs4_catatonic_mode(struct autofs_sb_info *sbi)
> while (wq) {
> nwq = wq->next;
> wq->status = -ENOENT; /* Magic is gone - report failure */
> - if (wq->name.name) {
> - kfree(wq->name.name);
> - wq->name.name = NULL;
> - }
> + kfree(wq->name.name);
> + wq->name.name = NULL;
> wq->wait_ctr--;
> wake_up_interruptible(&wq->queue);
> wq = nwq;
--
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