On Fri, 2020-08-28 at 01:10 -0700, Joe Perches wrote:
> On Fri, 2020-08-28 at 00:58 -0700, Kees Cook wrote:
> > On Thu, Aug 27, 2020 at 09:12:06PM -0700, Joe Perches wrote:
> > > Perhaps something like the below with a sample conversion
> > > that uses single and multiple sysfs_emit uses.
> >
> >
On Fri, 2020-08-28 at 00:58 -0700, Kees Cook wrote:
> On Thu, Aug 27, 2020 at 09:12:06PM -0700, Joe Perches wrote:
> > Perhaps something like the below with a sample conversion
> > that uses single and multiple sysfs_emit uses.
>
> On quick review, I like it. :)
>
> > [...]
> > +int sysfs_emit(ch
On Thu, Aug 27, 2020 at 09:12:06PM -0700, Joe Perches wrote:
> Perhaps something like the below with a sample conversion
> that uses single and multiple sysfs_emit uses.
On quick review, I like it. :)
> [...]
> +int sysfs_emit(char *buf, char *pos, const char *fmt, ...)
> +{
> + int len;
> +
From: Kees Cook
> Sent: 27 August 2020 23:21
...
>
> Agreed. This just makes me cringe. If the API design declares that when
> a show() callback starts, buf has been allocated with PAGE_SIZE bytes,
> then that's how the logic should proceed, and it should be using
> scnprintf...
>
> show(...) {
>
On Thu, 2020-08-27 at 15:45 -0700, Joe Perches wrote:
> On Thu, 2020-08-27 at 15:20 -0700, Kees Cook wrote:
> > On Fri, Aug 28, 2020 at 12:01:34AM +0300, Denis Efremov wrote:
> > > Just FYI, I've send an addition to the device_attr_show.cocci script[1]
> > > to turn
> > > simple cases of snprintf
On Fri, 2020-08-28 at 01:38 +0300, Denis Efremov wrote:
> > This will match it (the difference is in the ';'):
thanks.
On Thu, 2020-08-27 at 15:20 -0700, Kees Cook wrote:
> On Fri, Aug 28, 2020 at 12:01:34AM +0300, Denis Efremov wrote:
> > Just FYI, I've send an addition to the device_attr_show.cocci script[1] to
> > turn
> > simple cases of snprintf (e.g. "%i") to sprintf. Looks like many developers
> > would
>
>
> I tried:
> @@
> identifier f_show =~ "^.*_show$";
This will miss this kind of functions:
./drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c:1953:static
DEVICE_ATTR(vbios_version, 0444, amdgpu_atombios_get_vbios_version,
./drivers/gpu/drm/amd/amdgpu/df_v3_6.c:266:static DEVICE_ATTR(df_cntr_avail
On Fri, Aug 28, 2020 at 12:01:34AM +0300, Denis Efremov wrote:
> Just FYI, I've send an addition to the device_attr_show.cocci script[1] to
> turn
> simple cases of snprintf (e.g. "%i") to sprintf. Looks like many developers
> would
> like it more than changing snprintf to scnprintf. As for me, I
On Thu, Aug 27, 2020 at 03:11:57PM -0700, Joe Perches wrote:
> On Thu, 2020-08-27 at 22:03 +, David Laight wrote:
> > From: Joe Perches
> > > Sent: 27 August 2020 21:30
> > ...
> > > Perhaps what's necessary is to find any
> > > appropriate .show function and change
> > > any use of strcpy/spri
On Thu, 2020-08-27 at 22:03 +, David Laight wrote:
> From: Joe Perches
> > Sent: 27 August 2020 21:30
> ...
> > Perhaps what's necessary is to find any
> > appropriate .show function and change
> > any use of strcpy/sprintf within those
> > function to some other name.
> >
> > For instance:
>
From: Joe Perches
> Sent: 27 August 2020 21:30
...
> Perhaps what's necessary is to find any
> appropriate .show function and change
> any use of strcpy/sprintf within those
> function to some other name.
>
> For instance:
>
> drivers/isdn/mISDN/core.c-static ssize_t name_show(struct device *dev,
> Subject: Re: [PATCH] usb: atm: don't use snprintf() for sysfs attrs
>
> On Thu, 2020-08-27 at 15:48 +0100, Alex Dewar wrote:
> > On Thu, Aug 27, 2020 at 03:41:06PM +0200, Rasmus Villemoes wrote:
> > > On 27/08/2020 15.18, Alex Dewar wrote:
> > > >
On Thu, 2020-08-27 at 23:36 +0200, Julia Lawall wrote:
> On Fri, 28 Aug 2020, Denis Efremov wrote:
[]
> Regarding current device_attr_show.cocci implementation, it detects the
> functions
> > by declaration:
> > ssize_t any_name(struct device *dev, struct device_attribute *attr, char
> > *buf)
>
On Fri, 28 Aug 2020, Denis Efremov wrote:
> Hi all,
>
> On 8/27/20 10:42 PM, Julia Lawall wrote:
> >
> >
> > On Thu, 27 Aug 2020, Joe Perches wrote:
> >
> >> On Thu, 2020-08-27 at 15:48 +0100, Alex Dewar wrote:
> >>> On Thu, Aug 27, 2020 at 03:41:06PM +0200, Rasmus Villemoes wrote:
> On 27
On Thu, 27 Aug 2020, Joe Perches wrote:
> On Thu, 2020-08-27 at 21:42 +0200, Julia Lawall wrote:
> >
> > On Thu, 27 Aug 2020, Joe Perches wrote:
> >
> > > On Thu, 2020-08-27 at 15:48 +0100, Alex Dewar wrote:
> > > > On Thu, Aug 27, 2020 at 03:41:06PM +0200, Rasmus Villemoes wrote:
> > > > > On
Hi all,
On 8/27/20 10:42 PM, Julia Lawall wrote:
>
>
> On Thu, 27 Aug 2020, Joe Perches wrote:
>
>> On Thu, 2020-08-27 at 15:48 +0100, Alex Dewar wrote:
>>> On Thu, Aug 27, 2020 at 03:41:06PM +0200, Rasmus Villemoes wrote:
On 27/08/2020 15.18, Alex Dewar wrote:
> On Thu, Aug 27, 2020 a
On Thu, 2020-08-27 at 13:29 -0700, Joe Perches wrote:
> On Thu, 2020-08-27 at 21:42 +0200, Julia Lawall wrote:
> > On Thu, 27 Aug 2020, Joe Perches wrote:
> >
> > > On Thu, 2020-08-27 at 15:48 +0100, Alex Dewar wrote:
> > > > On Thu, Aug 27, 2020 at 03:41:06PM +0200, Rasmus Villemoes wrote:
> > >
On Thu, 2020-08-27 at 21:42 +0200, Julia Lawall wrote:
>
> On Thu, 27 Aug 2020, Joe Perches wrote:
>
> > On Thu, 2020-08-27 at 15:48 +0100, Alex Dewar wrote:
> > > On Thu, Aug 27, 2020 at 03:41:06PM +0200, Rasmus Villemoes wrote:
> > > > On 27/08/2020 15.18, Alex Dewar wrote:
> > > > > On Thu, Au
On Thu, 27 Aug 2020, Joe Perches wrote:
> On Thu, 2020-08-27 at 15:48 +0100, Alex Dewar wrote:
> > On Thu, Aug 27, 2020 at 03:41:06PM +0200, Rasmus Villemoes wrote:
> > > On 27/08/2020 15.18, Alex Dewar wrote:
> > > > On Thu, Aug 27, 2020 at 09:15:37AM +0200, Greg Kroah-Hartman wrote:
> > > > >
On Thu, Aug 27, 2020 at 09:49:04AM -0700, Kees Cook wrote:
> On Tue, Aug 25, 2020 at 10:24:06AM +0200, Greg Kroah-Hartman wrote:
> > On Tue, Aug 25, 2020 at 08:12:05AM +, David Laight wrote:
> > > From: Alex Dewar
> > > > Sent: 24 August 2020 23:23
> > > > kernel/cpu.c: don't use snprintf() for
On Thu, 2020-08-27 at 15:48 +0100, Alex Dewar wrote:
> On Thu, Aug 27, 2020 at 03:41:06PM +0200, Rasmus Villemoes wrote:
> > On 27/08/2020 15.18, Alex Dewar wrote:
> > > On Thu, Aug 27, 2020 at 09:15:37AM +0200, Greg Kroah-Hartman wrote:
> > > > On Thu, Aug 27, 2020 at 08:42:06AM +0200, Rasmus Vill
On Tue, Aug 25, 2020 at 10:24:06AM +0200, Greg Kroah-Hartman wrote:
> On Tue, Aug 25, 2020 at 08:12:05AM +, David Laight wrote:
> > From: Alex Dewar
> > > Sent: 24 August 2020 23:23
> > > kernel/cpu.c: don't use snprintf() for sysfs attrs
> > >
> > > As per the documentation (Documentation/fil
On 27/08/2020 15.18, Alex Dewar wrote:
> On Thu, Aug 27, 2020 at 09:15:37AM +0200, Greg Kroah-Hartman wrote:
>> On Thu, Aug 27, 2020 at 08:42:06AM +0200, Rasmus Villemoes wrote:
>>> On 25/08/2020 00.23, Alex Dewar wrote:
kernel/cpu.c: don't use snprintf() for sysfs attrs
As per the d
On Thu, Aug 27, 2020 at 03:41:06PM +0200, Rasmus Villemoes wrote:
> On 27/08/2020 15.18, Alex Dewar wrote:
> > On Thu, Aug 27, 2020 at 09:15:37AM +0200, Greg Kroah-Hartman wrote:
> >> On Thu, Aug 27, 2020 at 08:42:06AM +0200, Rasmus Villemoes wrote:
> >>> On 25/08/2020 00.23, Alex Dewar wrote:
> >>
On Thu, Aug 27, 2020 at 09:15:37AM +0200, Greg Kroah-Hartman wrote:
> On Thu, Aug 27, 2020 at 08:42:06AM +0200, Rasmus Villemoes wrote:
> > On 25/08/2020 00.23, Alex Dewar wrote:
> > > kernel/cpu.c: don't use snprintf() for sysfs attrs
> > >
> > > As per the documentation (Documentation/filesystem
On Thu, Aug 27, 2020 at 08:42:06AM +0200, Rasmus Villemoes wrote:
> On 25/08/2020 00.23, Alex Dewar wrote:
> > kernel/cpu.c: don't use snprintf() for sysfs attrs
> >
> > As per the documentation (Documentation/filesystems/sysfs.rst),
> > snprintf() should not be used for formatting values returned
On 25/08/2020 00.23, Alex Dewar wrote:
> kernel/cpu.c: don't use snprintf() for sysfs attrs
>
> As per the documentation (Documentation/filesystems/sysfs.rst),
> snprintf() should not be used for formatting values returned by sysfs.
>
Sure. But then the security guys come along and send a patch s
From: Alex Dewar
> Sent: 25 August 2020 09:18
> On Tue, Aug 25, 2020 at 08:12:05AM +, David Laight wrote:
> > From: Alex Dewar
> > > Sent: 24 August 2020 23:23
> > > kernel/cpu.c: don't use snprintf() for sysfs attrs
> > >
> > > As per the documentation (Documentation/filesystems/sysfs.rst),
>
On Tue, Aug 25, 2020 at 08:12:05AM +, David Laight wrote:
> From: Alex Dewar
> > Sent: 24 August 2020 23:23
> > kernel/cpu.c: don't use snprintf() for sysfs attrs
> >
> > As per the documentation (Documentation/filesystems/sysfs.rst),
> > snprintf() should not be used for formatting values ret
On Tue, Aug 25, 2020 at 08:12:05AM +, David Laight wrote:
> From: Alex Dewar
> > Sent: 24 August 2020 23:23
> > kernel/cpu.c: don't use snprintf() for sysfs attrs
> >
> > As per the documentation (Documentation/filesystems/sysfs.rst),
> > snprintf() should not be used for formatting values ret
From: Alex Dewar
> Sent: 24 August 2020 23:23
> kernel/cpu.c: don't use snprintf() for sysfs attrs
>
> As per the documentation (Documentation/filesystems/sysfs.rst),
> snprintf() should not be used for formatting values returned by sysfs.
>
> In all of these cases, sprintf() suffices as we know
kernel/cpu.c: don't use snprintf() for sysfs attrs
As per the documentation (Documentation/filesystems/sysfs.rst),
snprintf() should not be used for formatting values returned by sysfs.
In all of these cases, sprintf() suffices as we know that the formatted
strings will be less than PAGE_SIZE in
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