From: Wei Liu <wei.liu2@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: George Dunlap <George.Dunlap@eu.citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>,
Wei Liu <wei.liu2@citrix.com>,
Paulina Szubarczyk <paulinaszubarczyk@gmail.com>,
Xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH] libxl: fix an error path that uses uninitialised rc in libxl_set_memory_target
Date: Wed, 22 Jun 2016 14:59:34 +0100 [thread overview]
Message-ID: <20160622135934.GF1790@citrix.com> (raw)
In-Reply-To: <576AB49402000078000F7B56@prv-mh.provo.novell.com>
On Wed, Jun 22, 2016 at 07:53:56AM -0600, Jan Beulich wrote:
> >>> On 22.06.16 at 15:47, <wei.liu2@citrix.com> wrote:
> > On Wed, Jun 22, 2016 at 06:58:28AM -0600, Jan Beulich wrote:
> >> >>> On 12.06.16 at 16:09, <wei.liu2@citrix.com> wrote:
> >> > --- a/tools/libxl/libxl.c
> >> > +++ b/tools/libxl/libxl.c
> >> > @@ -4927,10 +4927,12 @@ retry_transaction:
> >> >
> >> > target = libxl__xs_read(gc, t, GCSPRINTF("%s/memory/target", dompath));
> >> > if (!target && !domid) {
> >> > - if (!xs_transaction_end(ctx->xsh, t, 1))
> >> > + if (!xs_transaction_end(ctx->xsh, t, 1)) {
> >> > + rc = ERROR_FAIL;
> >>
> >> I'm sorry for noticing this only now - is ERROR_FAIL the right thing
> >> to use here, considering how things worked before the change that
> >> introduced the issue getting fixed here? I had intentionally decided
> >> to use ERROR_INVAL in the patch variant I did submit (as at that
> >> time I wasn't yet aware of the other fix floating around already).
> >>
> >
> > When I wrote this patch, I thought the return value should be tied to
> > xs_transaction_end.
>
> xs_transaction_end() returning zero means success afaict.
>
/* End a transaction.
* If abandon is true, transaction is discarded instead of committed.
* Returns false on failure: if errno == EAGAIN, you have to restart
* transaction.
*/
bool xs_transaction_end(struct xs_handle *h, xs_transaction_t t,
bool abort);
I think you misread.
Wei.
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next prev parent reply other threads:[~2016-06-22 13:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-12 14:09 [PATCH] libxl: fix an error path that uses uninitialised rc in libxl_set_memory_target Wei Liu
2016-06-20 13:32 ` Ian Jackson
2016-06-22 12:58 ` Jan Beulich
2016-06-22 13:47 ` Wei Liu
2016-06-22 13:53 ` Jan Beulich
2016-06-22 13:59 ` Wei Liu [this message]
2016-06-22 15:20 ` Jan Beulich
2016-06-22 15:29 ` Wei Liu
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