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Re: [Qemu-devel] [PATCH] qga: Fix handle fd leak in acquire_privilege()
From: |
Michael Roth |
Subject: |
Re: [Qemu-devel] [PATCH] qga: Fix handle fd leak in acquire_privilege() |
Date: |
Tue, 20 May 2014 14:46:38 -0500 |
User-agent: |
alot/0.3.4 |
Quoting Luiz Capitulino (2014-05-20 14:17:42)
> On Mon, 19 May 2014 15:26:03 +0800
> <address@hidden> wrote:
>
> > From: Gonglei <address@hidden>
> >
> > token should be closed in all conditions.
> > So move CloseHandle(token) to "out" branch.
>
> Looks good to me. Michael, are you going to pick this one?
Sure I'll queue it. Though i'm a bit surprised OpenProcessToken() will still
return an open handle on failure. Is there any confirmation a handle is
actually getting leaked here, as opposed to just returning a handle that's
already been closed?
If it's the latter case we might end up closing it twice after the change,
so just want to confirm.
>
> >
> > Signed-off-by: Wang Rui <address@hidden>
> > Signed-off-by: Gonglei <address@hidden>
> > ---
> > qga/commands-win32.c | 6 ++++--
> > 1 file changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/qga/commands-win32.c b/qga/commands-win32.c
> > index d793dd0..e769396 100644
> > --- a/qga/commands-win32.c
> > +++ b/qga/commands-win32.c
> > @@ -31,7 +31,7 @@
> >
> > static void acquire_privilege(const char *name, Error **errp)
> > {
> > - HANDLE token;
> > + HANDLE token = NULL;
> > TOKEN_PRIVILEGES priv;
> > Error *local_err = NULL;
> >
> > @@ -53,13 +53,15 @@ static void acquire_privilege(const char *name, Error
> > **errp)
> > goto out;
> > }
> >
> > - CloseHandle(token);
> > } else {
> > error_set(&local_err, QERR_QGA_COMMAND_FAILED,
> > "failed to open privilege token");
> > }
> >
> > out:
> > + if (token) {
> > + CloseHandle(token);
> > + }
> > if (local_err) {
> > error_propagate(errp, local_err);
> > }