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H A Dbinderfs.c01b3f1fc Mon Jan 21 04:48:05 CST 2019 Christian Brauner <christian@brauner.io> binderfs: rework binderfs_binder_device_create()

- switch from d_alloc_name() + d_lookup() to lookup_one_len():
Instead of using d_alloc_name() and then doing a d_lookup() with the
allocated dentry to find whether a device with the name we're trying to
create already exists switch to using lookup_one_len(). The latter will
either return the existing dentry or a new one.

- switch from kmalloc() + strscpy() to kmemdup():
Use a more idiomatic way to copy the name for the new dentry that
userspace gave us.

Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
01b3f1fc Mon Jan 21 04:48:05 CST 2019 Christian Brauner <christian@brauner.io> binderfs: rework binderfs_binder_device_create()

- switch from d_alloc_name() + d_lookup() to lookup_one_len():
Instead of using d_alloc_name() and then doing a d_lookup() with the
allocated dentry to find whether a device with the name we're trying to
create already exists switch to using lookup_one_len(). The latter will
either return the existing dentry or a new one.

- switch from kmalloc() + strscpy() to kmemdup():
Use a more idiomatic way to copy the name for the new dentry that
userspace gave us.

Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>