From: Konstantin Kostiuk <konstantin@daynix.com>
To: Michael Roth <michael.roth@amd.com>
Cc: "Daniel P. Berrangé" <berrange@redhat.com>,
Developers <qemu-devel@nongnu.org>,
"Michael Roth" <mdroth@linux.vnet.ibm.com>
Subject: Re: [PATCH v2] qga-win: Free GMatchInfo properly
Date: Wed, 28 Jul 2021 10:54:09 +0300 [thread overview]
Message-ID: <CAJ28CFQFxZxsEcy_3zDK1aLRbX0F2ZaMux8KgcE0thLXzm6kkA@mail.gmail.com> (raw)
In-Reply-To: <CAJ28CFQ6yMm6kCPMY5DckAg1__Qrk+Ar47FNXc5ON6QfvtDmgg@mail.gmail.com>
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ping
On Wed, Jul 14, 2021 at 10:26 AM Konstantin Kostiuk <konstantin@daynix.com>
wrote:
> CC Michael Roth
>
> On Thu, Jun 10, 2021 at 7:14 PM Daniel P. Berrangé <berrange@redhat.com>
> wrote:
>
>> On Thu, Jun 10, 2021 at 07:08:36PM +0300, Konstantin Kostiuk wrote:
>> > On Thu, Jun 10, 2021 at 7:02 PM Daniel P. Berrangé <berrange@redhat.com
>> >
>> > wrote:
>> >
>> > > On Thu, Jun 10, 2021 at 06:58:11PM +0300, Kostiantyn Kostiuk wrote:
>> > > > The g_regex_match function creates match_info even if it
>> > > > returns FALSE. So we should always call g_match_info_free.
>> > > > A better solution is using g_autoptr for match_info variable.
>> > > >
>> > > > Signed-off-by: Kostiantyn Kostiuk <konstantin@daynix.com>
>> > > > ---
>> > > > qga/commands-win32.c | 3 +--
>> > > > 1 file changed, 1 insertion(+), 2 deletions(-)
>> > > >
>> > > > diff --git a/qga/commands-win32.c b/qga/commands-win32.c
>> > > > index 300b87c859..785a5cc6b2 100644
>> > > > --- a/qga/commands-win32.c
>> > > > +++ b/qga/commands-win32.c
>> > > > @@ -2494,7 +2494,7 @@ GuestDeviceInfoList
>> *qmp_guest_get_devices(Error
>> > > **errp)
>> > > > continue;
>> > > > }
>> > > > for (j = 0; hw_ids[j] != NULL; j++) {
>> > > > - GMatchInfo *match_info;
>> > > > + g_autoptr(GMatchInfo) match_info;
>> > >
>> > > This should be initialized to NULL otherwise...
>> > >
>> > > > GuestDeviceIdPCI *id;
>> > > > if (!g_regex_match(device_pci_re, hw_ids[j], 0,
>> > > &match_info)) {
>> > > > continue;
>> > >
>> > > this continue will trigger freeing of unintialized memory
>> > >
>> >
>> > But we always call match_info, so match_info is always initialized.
>> > The g_regex_match function creates match_info even if it returns FALSE.
>>
>> Opps, yes, you are right.
>>
>> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
>>
>>
>> Regards,
>> Daniel
>> --
>> |: https://berrange.com -o-
>> https://www.flickr.com/photos/dberrange :|
>> |: https://libvirt.org -o-
>> https://fstop138.berrange.com :|
>> |: https://entangle-photo.org -o-
>> https://www.instagram.com/dberrange :|
>>
>>
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next prev parent reply other threads:[~2021-07-28 7:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-10 15:58 [PATCH v2] qga-win: Free GMatchInfo properly Kostiantyn Kostiuk
2021-06-10 16:02 ` Daniel P. Berrangé
2021-06-10 16:08 ` Konstantin Kostiuk
2021-06-10 16:14 ` Daniel P. Berrangé
2021-07-14 7:26 ` Konstantin Kostiuk
2021-07-28 7:54 ` Konstantin Kostiuk [this message]
2021-07-28 11:58 ` [PATCH-for-6.1 " Philippe Mathieu-Daudé
2021-06-10 16:04 ` [PATCH " Philippe Mathieu-Daudé
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