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From: Gerd Hoffmann <kraxel@redhat.com>
To: "Marc-André Lureau" <marcandre.lureau@gmail.com>
Cc: "Markus Armbruster" <armbru@redhat.com>,
	"Michael Roth" <mdroth@linux.vnet.ibm.com>,
	"Peter Crosthwaite" <crosthwaite.peter@gmail.com>,
	qemu-trivial@nongnu.org, "Alexander Graf" <agraf@suse.de>,
	qemu-devel@nongnu.org, "Philippe Mathieu-Daudé" <f4bug@amsat.org>
Subject: Re: [Qemu-trivial] [Qemu-devel] [PATCH RESEND 1/3] usb-ccid: make ccid_write_data_block() cope with null buffers
Date: Thu, 23 Mar 2017 10:51:20 +0100	[thread overview]
Message-ID: <1490262680.463.27.camel@redhat.com> (raw)
In-Reply-To: <CAJ+F1CJNy+e83EHR_8uzAHURxDk6idnNTTL_FoD-krWPue7Lww@mail.gmail.com>

  Hi,

>  oops, there are hard-coded calls with NULL/0. I suppose to fix clang
> warning, it would need to check if data != null for memcpy.

I'd check for len > 0, and in that if branch we can also assert on data
== NULL and thereby check that len and data are consistent.

cheers,
  Gerd




WARNING: multiple messages have this Message-ID (diff)
From: Gerd Hoffmann <kraxel@redhat.com>
To: "Marc-André Lureau" <marcandre.lureau@gmail.com>
Cc: "Markus Armbruster" <armbru@redhat.com>,
	"Michael Roth" <mdroth@linux.vnet.ibm.com>,
	"Peter Crosthwaite" <crosthwaite.peter@gmail.com>,
	qemu-trivial@nongnu.org, "Alexander Graf" <agraf@suse.de>,
	qemu-devel@nongnu.org, "Philippe Mathieu-Daudé" <f4bug@amsat.org>
Subject: Re: [Qemu-devel] [PATCH RESEND 1/3] usb-ccid: make ccid_write_data_block() cope with null buffers
Date: Thu, 23 Mar 2017 10:51:20 +0100	[thread overview]
Message-ID: <1490262680.463.27.camel@redhat.com> (raw)
In-Reply-To: <CAJ+F1CJNy+e83EHR_8uzAHURxDk6idnNTTL_FoD-krWPue7Lww@mail.gmail.com>

  Hi,

>  oops, there are hard-coded calls with NULL/0. I suppose to fix clang
> warning, it would need to check if data != null for memcpy.

I'd check for len > 0, and in that if branch we can also assert on data
== NULL and thereby check that len and data are consistent.

cheers,
  Gerd

  reply	other threads:[~2017-03-23  9:51 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-22 20:48 [Qemu-trivial] [PATCH RESEND 0/3] easy-to-fix clang warnings Philippe Mathieu-Daudé
2017-03-22 20:48 ` [Qemu-devel] " Philippe Mathieu-Daudé
2017-03-22 20:48 ` [Qemu-trivial] [PATCH RESEND 1/3] usb-ccid: make ccid_write_data_block() cope with null buffers Philippe Mathieu-Daudé
2017-03-22 20:48   ` [Qemu-devel] " Philippe Mathieu-Daudé
2017-03-23  6:49   ` [Qemu-trivial] " Markus Armbruster
2017-03-23  6:49     ` Markus Armbruster
2017-03-23  7:43     ` [Qemu-trivial] " Gerd Hoffmann
2017-03-23  7:43       ` Gerd Hoffmann
2017-03-23  8:14       ` [Qemu-trivial] " Marc-André Lureau
2017-03-23  8:14         ` Marc-André Lureau
2017-03-23  9:51         ` Gerd Hoffmann [this message]
2017-03-23  9:51           ` Gerd Hoffmann
2017-03-23 12:41           ` [Qemu-trivial] " Markus Armbruster
2017-03-23 12:41             ` Markus Armbruster
2017-03-23 13:56             ` [Qemu-trivial] " Gerd Hoffmann
2017-03-23 13:56               ` Gerd Hoffmann
2017-03-23 14:08               ` [Qemu-trivial] " Markus Armbruster
2017-03-23 14:08                 ` Markus Armbruster
2017-04-07 21:33                 ` [Qemu-trivial] " Philippe Mathieu-Daudé
2017-04-07 21:33                   ` Philippe Mathieu-Daudé
2017-03-22 20:48 ` [Qemu-trivial] [PATCH RESEND 2/3] device_tree: fix compiler warnings (clang 5) Philippe Mathieu-Daudé
2017-03-22 20:48   ` [Qemu-devel] " Philippe Mathieu-Daudé
2017-03-22 22:35   ` [Qemu-trivial] " Marc-André Lureau
2017-03-22 22:35     ` Marc-André Lureau
2017-03-22 20:48 ` [Qemu-trivial] [PATCH RESEND 3/3] qga: " Philippe Mathieu-Daudé
2017-03-22 20:48   ` [Qemu-devel] " Philippe Mathieu-Daudé
2017-03-22 21:22   ` [Qemu-trivial] " Michael Roth
2017-03-22 21:22     ` [Qemu-devel] " Michael Roth
2017-04-07 21:31     ` [Qemu-trivial] " Philippe Mathieu-Daudé
2017-04-07 21:31       ` Philippe Mathieu-Daudé

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