From: Sandeep Dhavale Date: Sat, 1 Apr 2023 06:05:08 +0000 (+0000) Subject: usb: gadget: f_fs: Fix ffs_epfile_read_iter to handle ITER_UBUF X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d356b3cdd00cae4508be566a47c0cfb74e14862a;p=linux.git usb: gadget: f_fs: Fix ffs_epfile_read_iter to handle ITER_UBUF iov_iter for ffs_epfile_read_iter can be ITER_UBUF with io_uring. In that case dup_iter() does not have to allocate anything and it can return NULL. ffs_epfile_read_iter treats this as a failure and returns -ENOMEM. Fix it by checking if iter_is_ubuf(). 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/20230401060509.3608259-2-dhavale@google.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index ddfc537c7526b..56cdfb2e42113 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -1251,7 +1251,7 @@ static ssize_t ffs_epfile_read_iter(struct kiocb *kiocb, struct iov_iter *to) p->kiocb = kiocb; if (p->aio) { p->to_free = dup_iter(&p->data, to, GFP_KERNEL); - if (!p->to_free) { + if (!iter_is_ubuf(&p->data) && !p->to_free) { kfree(p); return -ENOMEM; }