2019-09-05 06:50:35

by Kelsey

Subject: [PATCH] PCI/IOV: Make SR-IOV attributes with mode 0664 use 0644

sriov_numvfs and sriov_drivers_autoprobe have "unusual" permissions (0664)
with no reported or found reason for allowing group write permissions.
libvirt runs as root when dealing with PCI, and chowns files for qemu
needs. There is not a need for the "0664" permissions.

sriov_numvfs was introduced in:
commit 1789382a72a5 ("PCI: SRIOV control and status via sysfs")

sriov_drivers_autoprobe was introduced in:
commit 0e7df22401a3 ("PCI: Add sysfs sriov_drivers_autoprobe to
control VF driver binding")

Change sriov_numvfs and sriov_drivers_autoprobe from "0664" permissions to
"0644" permissions.

Exchange DEVICE_ATTR() with DEVICE_ATTR_RW() which sets the mode to "0644".
DEVICE_ATTR() should only be used for "unusual" permissions.

Signed-off-by: Kelsey Skunberg <[email protected]>
---
drivers/pci/iov.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index b335db21c85e..b3f972e8cfed 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -375,12 +375,11 @@ static ssize_t sriov_drivers_autoprobe_store(struct device *dev,
}

static DEVICE_ATTR_RO(sriov_totalvfs);
-static DEVICE_ATTR(sriov_numvfs, 0664, sriov_numvfs_show, sriov_numvfs_store);
+static DEVICE_ATTR_RW(sriov_numvfs);
static DEVICE_ATTR_RO(sriov_offset);
static DEVICE_ATTR_RO(sriov_stride);
static DEVICE_ATTR_RO(sriov_vf_device);
-static DEVICE_ATTR(sriov_drivers_autoprobe, 0664, sriov_drivers_autoprobe_show,
- sriov_drivers_autoprobe_store);
+static DEVICE_ATTR_RW(sriov_drivers_autoprobe);

static struct attribute *sriov_dev_attrs[] = {
&dev_attr_sriov_totalvfs.attr,
--
2.20.1

2019-09-05 07:57:05

by Greg KH

Subject: Re: [PATCH] PCI/IOV: Make SR-IOV attributes with mode 0664 use 0644

On Thu, Sep 05, 2019 at 12:32:26AM -0600, Kelsey Skunberg wrote:
> sriov_numvfs and sriov_drivers_autoprobe have "unusual" permissions (0664)
> with no reported or found reason for allowing group write permissions.
> libvirt runs as root when dealing with PCI, and chowns files for qemu
> needs. There is not a need for the "0664" permissions.
>
> sriov_numvfs was introduced in:
> commit 1789382a72a5 ("PCI: SRIOV control and status via sysfs")
>
> sriov_drivers_autoprobe was introduced in:
> commit 0e7df22401a3 ("PCI: Add sysfs sriov_drivers_autoprobe to
> control VF driver binding")
>
> Change sriov_numvfs and sriov_drivers_autoprobe from "0664" permissions to
> "0644" permissions.
>
> Exchange DEVICE_ATTR() with DEVICE_ATTR_RW() which sets the mode to "0644".
> DEVICE_ATTR() should only be used for "unusual" permissions.
>
> Signed-off-by: Kelsey Skunberg <[email protected]>
> ---
> drivers/pci/iov.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> index b335db21c85e..b3f972e8cfed 100644
> --- a/drivers/pci/iov.c
> +++ b/drivers/pci/iov.c
> @@ -375,12 +375,11 @@ static ssize_t sriov_drivers_autoprobe_store(struct device *dev,
> }
>
> static DEVICE_ATTR_RO(sriov_totalvfs);
> -static DEVICE_ATTR(sriov_numvfs, 0664, sriov_numvfs_show, sriov_numvfs_store);
> +static DEVICE_ATTR_RW(sriov_numvfs);
> static DEVICE_ATTR_RO(sriov_offset);
> static DEVICE_ATTR_RO(sriov_stride);
> static DEVICE_ATTR_RO(sriov_vf_device);
> -static DEVICE_ATTR(sriov_drivers_autoprobe, 0664, sriov_drivers_autoprobe_show,
> - sriov_drivers_autoprobe_store);
> +static DEVICE_ATTR_RW(sriov_drivers_autoprobe);
>
> static struct attribute *sriov_dev_attrs[] = {
> &dev_attr_sriov_totalvfs.attr,


Nice!!!

Reviewed-by: Greg Kroah-Hartman <[email protected]>

2019-09-05 19:24:02

by Donald Dutile

Subject: Re: [PATCH] PCI/IOV: Make SR-IOV attributes with mode 0664 use 0644

On 09/05/2019 02:32 AM, Kelsey Skunberg wrote:
> sriov_numvfs and sriov_drivers_autoprobe have "unusual" permissions (0664)
> with no reported or found reason for allowing group write permissions.
> libvirt runs as root when dealing with PCI, and chowns files for qemu
> needs. There is not a need for the "0664" permissions.
>
> sriov_numvfs was introduced in:
> commit 1789382a72a5 ("PCI: SRIOV control and status via sysfs")
>
> sriov_drivers_autoprobe was introduced in:
> commit 0e7df22401a3 ("PCI: Add sysfs sriov_drivers_autoprobe to
> control VF driver binding")
>
> Change sriov_numvfs and sriov_drivers_autoprobe from "0664" permissions to
> "0644" permissions.
>
> Exchange DEVICE_ATTR() with DEVICE_ATTR_RW() which sets the mode to "0644".
> DEVICE_ATTR() should only be used for "unusual" permissions.
>
> Signed-off-by: Kelsey Skunberg <[email protected]>
> ---
> drivers/pci/iov.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> index b335db21c85e..b3f972e8cfed 100644
> --- a/drivers/pci/iov.c
> +++ b/drivers/pci/iov.c
> @@ -375,12 +375,11 @@ static ssize_t sriov_drivers_autoprobe_store(struct device *dev,
> }
>
> static DEVICE_ATTR_RO(sriov_totalvfs);
> -static DEVICE_ATTR(sriov_numvfs, 0664, sriov_numvfs_show, sriov_numvfs_store);
> +static DEVICE_ATTR_RW(sriov_numvfs);
> static DEVICE_ATTR_RO(sriov_offset);
> static DEVICE_ATTR_RO(sriov_stride);
> static DEVICE_ATTR_RO(sriov_vf_device);
> -static DEVICE_ATTR(sriov_drivers_autoprobe, 0664, sriov_drivers_autoprobe_show,
> - sriov_drivers_autoprobe_store);
> +static DEVICE_ATTR_RW(sriov_drivers_autoprobe);
>
> static struct attribute *sriov_dev_attrs[] = {
> &dev_attr_sriov_totalvfs.attr,
>
Thanks again for the cleanup.

Acked-by: Donald Dutile <[email protected]>

2019-09-05 22:53:21

by Kelsey

Subject: Re: [PATCH] PCI/IOV: Make SR-IOV attributes with mode 0664 use 0644

On Thu, Sep 05, 2019 at 09:34:16AM +0200, Greg KH wrote:
> On Thu, Sep 05, 2019 at 12:32:26AM -0600, Kelsey Skunberg wrote:
> > sriov_numvfs and sriov_drivers_autoprobe have "unusual" permissions (0664)
> > with no reported or found reason for allowing group write permissions.
> > libvirt runs as root when dealing with PCI, and chowns files for qemu
> > needs. There is not a need for the "0664" permissions.
> >
> > sriov_numvfs was introduced in:
> > commit 1789382a72a5 ("PCI: SRIOV control and status via sysfs")
> >
> > sriov_drivers_autoprobe was introduced in:
> > commit 0e7df22401a3 ("PCI: Add sysfs sriov_drivers_autoprobe to
> > control VF driver binding")
> >
> > Change sriov_numvfs and sriov_drivers_autoprobe from "0664" permissions to
> > "0644" permissions.
> >
> > Exchange DEVICE_ATTR() with DEVICE_ATTR_RW() which sets the mode to "0644".
> > DEVICE_ATTR() should only be used for "unusual" permissions.
> >
> > Signed-off-by: Kelsey Skunberg <[email protected]>
> > ---
> > drivers/pci/iov.c | 5 ++---
> > 1 file changed, 2 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> > index b335db21c85e..b3f972e8cfed 100644
> > --- a/drivers/pci/iov.c
> > +++ b/drivers/pci/iov.c
> > @@ -375,12 +375,11 @@ static ssize_t sriov_drivers_autoprobe_store(struct device *dev,
> > }
> >
> > static DEVICE_ATTR_RO(sriov_totalvfs);
> > -static DEVICE_ATTR(sriov_numvfs, 0664, sriov_numvfs_show, sriov_numvfs_store);
> > +static DEVICE_ATTR_RW(sriov_numvfs);
> > static DEVICE_ATTR_RO(sriov_offset);
> > static DEVICE_ATTR_RO(sriov_stride);
> > static DEVICE_ATTR_RO(sriov_vf_device);
> > -static DEVICE_ATTR(sriov_drivers_autoprobe, 0664, sriov_drivers_autoprobe_show,
> > - sriov_drivers_autoprobe_store);
> > +static DEVICE_ATTR_RW(sriov_drivers_autoprobe);
> >
> > static struct attribute *sriov_dev_attrs[] = {
> > &dev_attr_sriov_totalvfs.attr,
>
>
> Nice!!!
>
> Reviewed-by: Greg Kroah-Hartman <[email protected]>

Thank you for reviewing!

-Kelsey

2019-09-06 02:20:27

by Bjorn Helgaas

Subject: Re: [Linux-kernel-mentees] [PATCH] PCI/IOV: Make SR-IOV attributes with mode 0664 use 0644

[+cc Bodong, Eli: just FYI since this affects sriov_drivers_autoprobe,
which you added with 0e7df22401a3]

On Thu, Sep 05, 2019 at 12:32:26AM -0600, Kelsey Skunberg wrote:
> sriov_numvfs and sriov_drivers_autoprobe have "unusual" permissions (0664)
> with no reported or found reason for allowing group write permissions.
> libvirt runs as root when dealing with PCI, and chowns files for qemu
> needs. There is not a need for the "0664" permissions.
>
> sriov_numvfs was introduced in:
> commit 1789382a72a5 ("PCI: SRIOV control and status via sysfs")
>
> sriov_drivers_autoprobe was introduced in:
> commit 0e7df22401a3 ("PCI: Add sysfs sriov_drivers_autoprobe to
> control VF driver binding")
>
> Change sriov_numvfs and sriov_drivers_autoprobe from "0664" permissions to
> "0644" permissions.
>
> Exchange DEVICE_ATTR() with DEVICE_ATTR_RW() which sets the mode to "0644".
> DEVICE_ATTR() should only be used for "unusual" permissions.
>
> Signed-off-by: Kelsey Skunberg <[email protected]>

Applied with Greg's Reviewed-by and Don's Acked-by to pci/misc for
v5.4, thanks!

> ---
> drivers/pci/iov.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> index b335db21c85e..b3f972e8cfed 100644
> --- a/drivers/pci/iov.c
> +++ b/drivers/pci/iov.c
> @@ -375,12 +375,11 @@ static ssize_t sriov_drivers_autoprobe_store(struct device *dev,
> }
>
> static DEVICE_ATTR_RO(sriov_totalvfs);
> -static DEVICE_ATTR(sriov_numvfs, 0664, sriov_numvfs_show, sriov_numvfs_store);
> +static DEVICE_ATTR_RW(sriov_numvfs);
> static DEVICE_ATTR_RO(sriov_offset);
> static DEVICE_ATTR_RO(sriov_stride);
> static DEVICE_ATTR_RO(sriov_vf_device);
> -static DEVICE_ATTR(sriov_drivers_autoprobe, 0664, sriov_drivers_autoprobe_show,
> - sriov_drivers_autoprobe_store);
> +static DEVICE_ATTR_RW(sriov_drivers_autoprobe);
>
> static struct attribute *sriov_dev_attrs[] = {
> &dev_attr_sriov_totalvfs.attr,
> --
> 2.20.1
>
> _______________________________________________
> Linux-kernel-mentees mailing list
> [email protected]
> https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees

2019-09-06 04:35:30

by Kelsey

Subject: Re: [PATCH] PCI/IOV: Make SR-IOV attributes with mode 0664 use 0644

On Thu, Sep 05, 2019 at 12:24:19PM -0400, Don Dutile wrote:
> On 09/05/2019 02:32 AM, Kelsey Skunberg wrote:
> > sriov_numvfs and sriov_drivers_autoprobe have "unusual" permissions (0664)
> > with no reported or found reason for allowing group write permissions.
> > libvirt runs as root when dealing with PCI, and chowns files for qemu
> > needs. There is not a need for the "0664" permissions.
> >
> > sriov_numvfs was introduced in:
> > commit 1789382a72a5 ("PCI: SRIOV control and status via sysfs")
> >
> > sriov_drivers_autoprobe was introduced in:
> > commit 0e7df22401a3 ("PCI: Add sysfs sriov_drivers_autoprobe to
> > control VF driver binding")
> >
> > Change sriov_numvfs and sriov_drivers_autoprobe from "0664" permissions to
> > "0644" permissions.
> >
> > Exchange DEVICE_ATTR() with DEVICE_ATTR_RW() which sets the mode to "0644".
> > DEVICE_ATTR() should only be used for "unusual" permissions.
> >
> > Signed-off-by: Kelsey Skunberg <[email protected]>
> > ---
> > drivers/pci/iov.c | 5 ++---
> > 1 file changed, 2 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> > index b335db21c85e..b3f972e8cfed 100644
> > --- a/drivers/pci/iov.c
> > +++ b/drivers/pci/iov.c
> > @@ -375,12 +375,11 @@ static ssize_t sriov_drivers_autoprobe_store(struct device *dev,
> > }
> > static DEVICE_ATTR_RO(sriov_totalvfs);
> > -static DEVICE_ATTR(sriov_numvfs, 0664, sriov_numvfs_show, sriov_numvfs_store);
> > +static DEVICE_ATTR_RW(sriov_numvfs);
> > static DEVICE_ATTR_RO(sriov_offset);
> > static DEVICE_ATTR_RO(sriov_stride);
> > static DEVICE_ATTR_RO(sriov_vf_device);
> > -static DEVICE_ATTR(sriov_drivers_autoprobe, 0664, sriov_drivers_autoprobe_show,
> > - sriov_drivers_autoprobe_store);
> > +static DEVICE_ATTR_RW(sriov_drivers_autoprobe);
> > static struct attribute *sriov_dev_attrs[] = {
> > &dev_attr_sriov_totalvfs.attr,
> >
> Thanks again for the cleanup.
>
> Acked-by: Donald Dutile <[email protected]>
>

Glad I could contribute. Thanks for your help and the
acknowledgment. :)

-Kelsey