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driver core: handle user namespaces properly with the uid/gid devtmpfs change

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Now that devtmpfs is caring about uid/gid, we need to use the correct
internal types so users who have USER_NS enabled will have things work
properly for them.

Thanks to Eric for pointing this out, and the patch review.

Reported-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman
2013-04-11 11:43:29 -07:00
parent d81c8d19da
commit 4e4098a3e0
5 changed files with 20 additions and 20 deletions
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drivers/base/core.c
+7 -7
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@@ -283,8 +283,8 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj,
const char *tmp;
const char *name;
umode_t mode = 0;
uid_t uid = 0;
gid_t gid = 0;
kuid_t uid = GLOBAL_ROOT_UID;
kgid_t gid = GLOBAL_ROOT_GID;
add_uevent_var(env, "MAJOR=%u", MAJOR(dev->devt));
add_uevent_var(env, "MINOR=%u", MINOR(dev->devt));
@@ -293,10 +293,10 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj,
add_uevent_var(env, "DEVNAME=%s", name);
if (mode)
add_uevent_var(env, "DEVMODE=%#o", mode & 0777);
if (uid)
add_uevent_var(env, "DEVUID=%u", uid);
if (gid)
add_uevent_var(env, "DEVGID=%u", gid);
if (!uid_eq(uid, GLOBAL_ROOT_UID))
add_uevent_var(env, "DEVUID=%u", from_kuid(&init_user_ns, uid));
if (!gid_eq(gid, GLOBAL_ROOT_GID))
add_uevent_var(env, "DEVGID=%u", from_kgid(&init_user_ns, gid));
kfree(tmp);
}
}
@@ -1297,7 +1297,7 @@ static struct device *next_device(struct klist_iter *i)
* freed by the caller.
*/
const char *device_get_devnode(struct device *dev,
umode_t *mode, uid_t *uid, gid_t *gid,
umode_t *mode, kuid_t *uid, kgid_t *gid,
const char **tmp)
{
char *s;