Patchwork [REVIEW,12/15] userns: Convert drm to use kuid and kgid and struct pid where appropriate

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Submitter Eric W. Biederman
Date Aug. 26, 2012, 12:05 a.m.
Message ID <87mx1iecwi.fsf@xmission.com>
Download mbox | patch
Permalink /patch/180005/
State RFC
Delegated to: David Miller
Headers show

Comments

Eric W. Biederman - Aug. 26, 2012, 12:05 a.m.
Blink Blink this had not been converted to use struct pid ages ago?

- On drm open capture the openers kuid and struct pid.
- On drm close release the kuid and struct pid
- When reporting the uid and pid convert the kuid and struct pid
  into values in the appropriate namespace.

Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
 drivers/gpu/drm/drm_fops.c  |    3 ++-
 drivers/gpu/drm/drm_info.c  |    5 +++--
 drivers/gpu/drm/drm_ioctl.c |    4 ++--
 include/drm/drmP.h          |    4 ++--
 init/Kconfig                |    1 -
 5 files changed, 9 insertions(+), 8 deletions(-)
Dave Airlie - Sept. 13, 2012, 1:31 a.m.
> Blink Blink this had not been converted to use struct pid ages ago?
>
> - On drm open capture the openers kuid and struct pid.
> - On drm close release the kuid and struct pid
> - When reporting the uid and pid convert the kuid and struct pid
>   into values in the appropriate namespace.
>

Hi Eric,

I'm fine with this seems okay, do you want me to merge it via drm-next?

Dave.

> Cc: David Airlie <airlied@linux.ie>
> Cc: dri-devel@lists.freedesktop.org
> Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
> ---
>  drivers/gpu/drm/drm_fops.c  |    3 ++-
>  drivers/gpu/drm/drm_info.c  |    5 +++--
>  drivers/gpu/drm/drm_ioctl.c |    4 ++--
>  include/drm/drmP.h          |    4 ++--
>  init/Kconfig                |    1 -
>  5 files changed, 9 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
> index 5062eec..433d2fa 100644
> --- a/drivers/gpu/drm/drm_fops.c
> +++ b/drivers/gpu/drm/drm_fops.c
> @@ -251,7 +251,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
>         filp->private_data = priv;
>         priv->filp = filp;
>         priv->uid = current_euid();
> -       priv->pid = task_pid_nr(current);
> +       priv->pid = get_pid(task_pid(current));
>         priv->minor = idr_find(&drm_minors_idr, minor_id);
>         priv->ioctl_count = 0;
>         /* for compatibility root is always authenticated */
> @@ -524,6 +524,7 @@ int drm_release(struct inode *inode, struct file *filp)
>         if (drm_core_check_feature(dev, DRIVER_PRIME))
>                 drm_prime_destroy_file_private(&file_priv->prime);
>
> +       put_pid(file_priv->pid);
>         kfree(file_priv);
>
>         /* ========================================================
> diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c
> index 8928edb..eb0af39 100644
> --- a/drivers/gpu/drm/drm_info.c
> +++ b/drivers/gpu/drm/drm_info.c
> @@ -191,8 +191,9 @@ int drm_clients_info(struct seq_file *m, void *data)
>                 seq_printf(m, "%c %3d %5d %5d %10u %10lu\n",
>                            priv->authenticated ? 'y' : 'n',
>                            priv->minor->index,
> -                          priv->pid,
> -                          priv->uid, priv->magic, priv->ioctl_count);
> +                          pid_vnr(priv->pid),
> +                          from_kuid_munged(seq_user_ns(m), priv->uid),
> +                          priv->magic, priv->ioctl_count);
>         }
>         mutex_unlock(&dev->struct_mutex);
>         return 0;
> diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
> index 64a62c6..39a4383 100644
> --- a/drivers/gpu/drm/drm_ioctl.c
> +++ b/drivers/gpu/drm/drm_ioctl.c
> @@ -215,8 +215,8 @@ int drm_getclient(struct drm_device *dev, void *data,
>         list_for_each_entry(pt, &dev->filelist, lhead) {
>                 if (i++ >= idx) {
>                         client->auth = pt->authenticated;
> -                       client->pid = pt->pid;
> -                       client->uid = pt->uid;
> +                       client->pid = pid_vnr(pt->pid);
> +                       client->uid = from_kuid_munged(current_user_ns(), pt->uid);
>                         client->magic = pt->magic;
>                         client->iocs = pt->ioctl_count;
>                         mutex_unlock(&dev->struct_mutex);
> diff --git a/include/drm/drmP.h b/include/drm/drmP.h
> index d6b67bb..9bc5c6a 100644
> --- a/include/drm/drmP.h
> +++ b/include/drm/drmP.h
> @@ -426,8 +426,8 @@ struct drm_prime_file_private {
>  /** File private data */
>  struct drm_file {
>         int authenticated;
> -       pid_t pid;
> -       uid_t uid;
> +       struct pid *pid;
> +       kuid_t uid;
>         drm_magic_t magic;
>         unsigned long ioctl_count;
>         struct list_head lhead;
> diff --git a/init/Kconfig b/init/Kconfig
> index d849ba2..2a388e5 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -930,7 +930,6 @@ config UIDGID_CONVERTED
>         depends on FS_POSIX_ACL = n
>         depends on QUOTA = n
>         depends on QUOTACTL = n
> -       depends on DRM = n
>
>         # Networking
>         depends on NET_9P = n
> --
> 1.7.5.4
>
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Eric W. Biederman - Sept. 13, 2012, 2:14 a.m.
Dave Airlie <airlied@gmail.com> writes:

>> Blink Blink this had not been converted to use struct pid ages ago?
>>
>> - On drm open capture the openers kuid and struct pid.
>> - On drm close release the kuid and struct pid
>> - When reporting the uid and pid convert the kuid and struct pid
>>   into values in the appropriate namespace.
>>
>
> Hi Eric,
>
> I'm fine with this seems okay, do you want me to merge it via
> drm-next?

My plan is to merge it via my user namespace tree.  And since you have
responed positively I will add your acked-by.  There are some nice
synergies when I get all of the changes in one tree.

If for some reason you want to carry this in your drm tree we can work
something out.

In this case I expect the change isn't big enough to worry about.

Eric
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Dave Airlie - Sept. 13, 2012, 3:29 a.m.
On Thu, Sep 13, 2012 at 12:14 PM, Eric W. Biederman
<ebiederm@xmission.com> wrote:
> Dave Airlie <airlied@gmail.com> writes:
>
>>> Blink Blink this had not been converted to use struct pid ages ago?
>>>
>>> - On drm open capture the openers kuid and struct pid.
>>> - On drm close release the kuid and struct pid
>>> - When reporting the uid and pid convert the kuid and struct pid
>>>   into values in the appropriate namespace.
>>>
>>
>> Hi Eric,
>>
>> I'm fine with this seems okay, do you want me to merge it via
>> drm-next?
>
> My plan is to merge it via my user namespace tree.  And since you have
> responed positively I will add your acked-by.  There are some nice
> synergies when I get all of the changes in one tree.
>
> If for some reason you want to carry this in your drm tree we can work
> something out.
>
> In this case I expect the change isn't big enough to worry about.

No all fine by me,

for formality sake:
Acked-by: Dave Airlie <airlied@redhat.com>
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Patch

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 5062eec..433d2fa 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -251,7 +251,7 @@  static int drm_open_helper(struct inode *inode, struct file *filp,
 	filp->private_data = priv;
 	priv->filp = filp;
 	priv->uid = current_euid();
-	priv->pid = task_pid_nr(current);
+	priv->pid = get_pid(task_pid(current));
 	priv->minor = idr_find(&drm_minors_idr, minor_id);
 	priv->ioctl_count = 0;
 	/* for compatibility root is always authenticated */
@@ -524,6 +524,7 @@  int drm_release(struct inode *inode, struct file *filp)
 	if (drm_core_check_feature(dev, DRIVER_PRIME))
 		drm_prime_destroy_file_private(&file_priv->prime);
 
+	put_pid(file_priv->pid);
 	kfree(file_priv);
 
 	/* ========================================================
diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c
index 8928edb..eb0af39 100644
--- a/drivers/gpu/drm/drm_info.c
+++ b/drivers/gpu/drm/drm_info.c
@@ -191,8 +191,9 @@  int drm_clients_info(struct seq_file *m, void *data)
 		seq_printf(m, "%c %3d %5d %5d %10u %10lu\n",
 			   priv->authenticated ? 'y' : 'n',
 			   priv->minor->index,
-			   priv->pid,
-			   priv->uid, priv->magic, priv->ioctl_count);
+			   pid_vnr(priv->pid),
+			   from_kuid_munged(seq_user_ns(m), priv->uid),
+			   priv->magic, priv->ioctl_count);
 	}
 	mutex_unlock(&dev->struct_mutex);
 	return 0;
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 64a62c6..39a4383 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -215,8 +215,8 @@  int drm_getclient(struct drm_device *dev, void *data,
 	list_for_each_entry(pt, &dev->filelist, lhead) {
 		if (i++ >= idx) {
 			client->auth = pt->authenticated;
-			client->pid = pt->pid;
-			client->uid = pt->uid;
+			client->pid = pid_vnr(pt->pid);
+			client->uid = from_kuid_munged(current_user_ns(), pt->uid);
 			client->magic = pt->magic;
 			client->iocs = pt->ioctl_count;
 			mutex_unlock(&dev->struct_mutex);
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index d6b67bb..9bc5c6a 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -426,8 +426,8 @@  struct drm_prime_file_private {
 /** File private data */
 struct drm_file {
 	int authenticated;
-	pid_t pid;
-	uid_t uid;
+	struct pid *pid;
+	kuid_t uid;
 	drm_magic_t magic;
 	unsigned long ioctl_count;
 	struct list_head lhead;
diff --git a/init/Kconfig b/init/Kconfig
index d849ba2..2a388e5 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -930,7 +930,6 @@  config UIDGID_CONVERTED
 	depends on FS_POSIX_ACL = n
 	depends on QUOTA = n
 	depends on QUOTACTL = n
-	depends on DRM = n
 
 	# Networking
 	depends on NET_9P = n