From: Dan Carpenter <dan.carpenter@oracle.com>
To: Eugenio Perez Martin <eperezma@redhat.com>
Cc: "Kamde, Tanuj" <tanuj.kamde@amd.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
Wu Zongyong <wuzongyong@linux.alibaba.com>,
Si-Wei Liu <si-wei.liu@oracle.com>,
"pabloc@xilinx.com" <pabloc@xilinx.com>,
Eli Cohen <elic@nvidia.com>, Zhang Min <zhang.min9@zte.com.cn>,
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"Piotr.Uminski@intel.com" <Piotr.Uminski@intel.com>,
"martinh@xilinx.com" <martinh@xilinx.com>,
Xie Yongji <xieyongji@bytedance.com>,
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Longpeng <longpeng2@huawei.com>,
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Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
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Zhu Lingshan <lingshan.zhu@intel.com>
Subject: Re: [PATCH v3 2/4] vhost-vdpa: introduce STOP backend feature bit
Date: Mon, 30 May 2022 18:12:51 +0300 [thread overview]
Message-ID: <20220530151251.GV2168@kadam> (raw)
In-Reply-To: <20220530142725.GU2168@kadam>
On Mon, May 30, 2022 at 05:27:25PM +0300, Dan Carpenter wrote:
> On Fri, May 27, 2022 at 10:36:55AM +0300, Dan Carpenter wrote:
> > static void match_pointer(struct expression *ret_value)
> > {
> > struct symbol *type;
> > char *name;
> >
> > type = cur_func_return_type();
> > if (!type || sval_type_max(type).value != 1)
> > return;
> >
> > if (!is_pointer(ret_value))
> > return;
> >
> > name = expr_to_str(ret_value);
> > sm_msg("'%s' return pointer cast to bool", name);
> > free_string(name);
> > }
>
> I found a bug in Smatch with this check. With the Smatch bug fixed then
> there is only only place which does a legitimate implied pointer to bool
> cast. A different function returns NULL on error instead of false.
>
> drivers/gpu/drm/i915/display/intel_dmc.c:249 intel_dmc_has_payload() 'i915->dmc.dmc_info[0]->payload' return pointer cast to bool
> drivers/net/wireless/rndis_wlan.c:1980 rndis_bss_info_update() '(0)' return pointer cast to bool
> drivers/net/wireless/rndis_wlan.c:1989 rndis_bss_info_update() '(0)' return pointer cast to bool
> drivers/net/wireless/rndis_wlan.c:1995 rndis_bss_info_update() '(0)' return pointer cast to bool
Hm... I found another. I'm not sure why it wasn't showing up before.
lib/assoc_array.c:941 assoc_array_insert_mid_shortcut() 'edit' return pointer cast to bool
That's weird. I will re-run the test.
regards,
dan carpenter
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prev parent reply other threads:[~2022-05-30 15:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220525105922.2413991-1-eperezma@redhat.com>
[not found] ` <20220525105922.2413991-3-eperezma@redhat.com>
[not found] ` <BL1PR12MB582520CC9CE024149141327499D69@BL1PR12MB5825.namprd12.prod.outlook.com>
[not found] ` <CAJaqyWc9_ErCg4whLKrjNyP5z2DZno-LJm7PN=-9uk7PUT4fJw@mail.gmail.com>
2022-05-26 9:07 ` [PATCH v3 2/4] vhost-vdpa: introduce STOP backend feature bit Stefano Garzarella
[not found] ` <CAJaqyWf7PumZXy1g3PbbTNCdn3u1XH3XQF73tw2w8Py5yLkSAg@mail.gmail.com>
2022-05-26 13:20 ` Dan Carpenter
[not found] ` <CAJaqyWe4311B6SK997eijEJyhwnAxkBUGJ_0iuDNd=wZSt0DmQ@mail.gmail.com>
2022-05-26 19:06 ` Dan Carpenter
[not found] ` <CAJaqyWdfWgC-uthR0aCjitCrBf=ca=Ee1oAB=JumffK=eSLgng@mail.gmail.com>
2022-05-27 7:36 ` Dan Carpenter
2022-05-30 14:27 ` Dan Carpenter
2022-05-30 15:12 ` Dan Carpenter [this message]
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