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 <dhavale@google.com>
---
drivers/usb/gadget/function/f_fs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 8830847fbf97..a13c946e0663 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1230,7 +1230,7 @@ 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;
}
--
2.40.0.348.gf938b09366-goog