Use credential guards for scoped credential override with automatic restoration on scope exit.
Signed-off-by: Christian Brauner <[email protected]> --- fs/nfs/localio.c | 31 ++++++++++++++----------------- 1 file changed, 14 insertions(+), 17 deletions(-) diff --git a/fs/nfs/localio.c b/fs/nfs/localio.c index 2c0455e91571..48bfe54b48a4 100644 --- a/fs/nfs/localio.c +++ b/fs/nfs/localio.c @@ -595,29 +595,26 @@ static void nfs_local_call_read(struct work_struct *work) struct nfs_local_kiocb *iocb = container_of(work, struct nfs_local_kiocb, work); struct file *filp = iocb->kiocb.ki_filp; - const struct cred *save_cred; ssize_t status; - save_cred = override_creds(filp->f_cred); - - for (int i = 0; i < iocb->n_iters ; i++) { - if (iocb->iter_is_dio_aligned[i]) { - iocb->kiocb.ki_flags |= IOCB_DIRECT; - iocb->kiocb.ki_complete = nfs_local_read_aio_complete; - iocb->aio_complete_work = nfs_local_read_aio_complete_work; - } + scoped_with_creds(filp->f_cred) { + for (int i = 0; i < iocb->n_iters ; i++) { + if (iocb->iter_is_dio_aligned[i]) { + iocb->kiocb.ki_flags |= IOCB_DIRECT; + iocb->kiocb.ki_complete = nfs_local_read_aio_complete; + iocb->aio_complete_work = nfs_local_read_aio_complete_work; + } - iocb->kiocb.ki_pos = iocb->offset[i]; - status = filp->f_op->read_iter(&iocb->kiocb, &iocb->iters[i]); - if (status != -EIOCBQUEUED) { - nfs_local_pgio_done(iocb->hdr, status); - if (iocb->hdr->task.tk_status) - break; + iocb->kiocb.ki_pos = iocb->offset[i]; + status = filp->f_op->read_iter(&iocb->kiocb, &iocb->iters[i]); + if (status != -EIOCBQUEUED) { + nfs_local_pgio_done(iocb->hdr, status); + if (iocb->hdr->task.tk_status) + break; + } } } - revert_creds(save_cred); - if (status != -EIOCBQUEUED) { nfs_local_read_done(iocb, status); nfs_local_pgio_release(iocb); -- 2.47.3
