From e07fec475cc86ce6ded82908df1d511edc3303b7 Mon Sep 17 00:00:00 2001 From: Sandeep Dhavale Date: Sat, 1 Apr 2023 06:05:09 +0000 Subject: [PATCH] usb: gadgetfs: Fix ep_read_iter to handle ITER_UBUF iov_iter for ep_read_iter can be ITER_UBUF with io_uring. In that case dup_iter() does not have to allocate iov and it can return NULL. Fix the assumption by checking for iter_is_ubuf() other wise ep_read_iter can treat this as failure and return -ENOMEM. Fixes: 1e23db450cff ("io_uring: use iter_ubuf for single range imports") Signed-off-by: Sandeep Dhavale Acked-by: Jens Axboe Link: https://lore.kernel.org/r/20230401060509.3608259-3-dhavale@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/legacy/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c index d605bc2e7e8f..28249d0bf062 100644 --- a/drivers/usb/gadget/legacy/inode.c +++ b/drivers/usb/gadget/legacy/inode.c @@ -614,7 +614,7 @@ ep_read_iter(struct kiocb *iocb, struct iov_iter *to) if (!priv) goto fail; priv->to_free = dup_iter(&priv->to, to, GFP_KERNEL); - if (!priv->to_free) { + if (!iter_is_ubuf(&priv->to) && !priv->to_free) { kfree(priv); goto fail; }