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Wed, 29 Jun 2022 20:51:57 -0700 (PDT) Date: Thu, 30 Jun 2022 09:21:50 +0530 From: Sebin Sebastian To: Greg Kroah-Hartman Cc: Neal Liu , Felipe Balbi , Joel Stanley , Andrew Jeffery , linux-aspeed@lists.ozlabs.org, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH -next] usb: gadget: dereference before null check Message-ID: References: <20220629080726.107297-1-mailmesebin00@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220629_205200_574766_E8BF98E2 X-CRM114-Status: GOOD ( 43.69 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jun 29, 2022 at 05:31:57PM +0200, Greg Kroah-Hartman wrote: > On Wed, Jun 29, 2022 at 05:44:55PM +0530, Sebin Sebastian wrote: > > On Wed, Jun 29, 2022 at 10:24:07AM +0200, Greg Kroah-Hartman wrote: > > > On Wed, Jun 29, 2022 at 01:37:25PM +0530, SebinSebastian wrote: > > > > Fix coverity warning dereferencing before null check. _ep and desc is > > > > dereferenced on all paths until the check for null. Move the > > > > initializations after the check for null. > > > > Coverity issue: 1518209 > > > > > > > > Signed-off-by: SebinSebastian > > > > --- > > > > drivers/usb/gadget/udc/aspeed_udc.c | 9 +++++---- > > > > 1 file changed, 5 insertions(+), 4 deletions(-) > > > > > > > > diff --git a/drivers/usb/gadget/udc/aspeed_udc.c b/drivers/usb/gadget/udc/aspeed_udc.c > > > > index d75a4e070bf7..96f8193fca15 100644 > > > > --- a/drivers/usb/gadget/udc/aspeed_udc.c > > > > +++ b/drivers/usb/gadget/udc/aspeed_udc.c > > > > @@ -341,10 +341,6 @@ static void ast_udc_stop_activity(struct ast_udc_dev *udc) > > > > static int ast_udc_ep_enable(struct usb_ep *_ep, > > > > const struct usb_endpoint_descriptor *desc) > > > > { > > > > - u16 maxpacket = usb_endpoint_maxp(desc); > > > > - struct ast_udc_ep *ep = to_ast_ep(_ep); > > > > - struct ast_udc_dev *udc = ep->udc; > > > > - u8 epnum = usb_endpoint_num(desc); > > > > unsigned long flags; > > > > u32 ep_conf = 0; > > > > u8 dir_in; > > > > @@ -356,6 +352,11 @@ static int ast_udc_ep_enable(struct usb_ep *_ep, > > > > return -EINVAL; > > > > } > > > > > > > > + u16 maxpacket = usb_endpoint_maxp(desc); > > > > + struct ast_udc_ep *ep = to_ast_ep(_ep); > > > > + struct ast_udc_dev *udc = ep->udc; > > > > + u8 epnum = usb_endpoint_num(desc); > > > > + > > > > if (!udc->driver) { > > > > EP_DBG(ep, "bogus device state\n"); > > > > return -ESHUTDOWN; > > > > -- > > > > 2.34.1 > > > > > > > > > > Hi, > > > > > > This is the friendly patch-bot of Greg Kroah-Hartman. You have sent him > > > a patch that has triggered this response. He used to manually respond > > > to these common problems, but in order to save his sanity (he kept > > > writing the same thing over and over, yet to different people), I was > > > created. Hopefully you will not take offence and will fix the problem > > > in your patch and resubmit it so that it can be accepted into the Linux > > > kernel tree. > > > > > > You are receiving this message because of the following common error(s) > > > as indicated below: > > > > > > - Your patch breaks the build. > > > > > > - Your patch contains warnings and/or errors noticed by the > > > scripts/checkpatch.pl tool. > > > > > > - This looks like a new version of a previously submitted patch, but you > > > did not list below the --- line any changes from the previous version. > > > Please read the section entitled "The canonical patch format" in the > > > kernel file, Documentation/SubmittingPatches for what needs to be done > > > here to properly describe this. > > > > > > If you wish to discuss this problem further, or you have questions about > > > how to resolve this issue, please feel free to respond to this email and > > > Greg will reply once he has dug out from the pending patches received > > > from other developers. > > > > > > thanks, > > > > > > greg k-h's patch email bot > > > > I am sorry to keep on bothering with this incorrect patches. I am > > running the checkpatch script everytime before I sent any patches. It is > > not showing any warnings or errors. Is it because of my name that my > > patches are getting rejected? I can see a space missing. > > Did you test build your patch? If not, why not? > > thanks, > > greg k-h Ok, now I understand the source of all errors. I did build the entire tree, but make never touched udc. I have fixed all errors and warnings, build the patch properly, ran through checkpatch and is now ready for submission. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel