Commit 977bc873 authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring/rsrc: always initialize 'folio' to NULL 



Smatch complains that:

smatch warnings:
io_uring/rsrc.c:1262 io_sqe_buffer_register() error: uninitialized symbol 'folio'.

'folio' may be used uninitialized, which can happen if we end up with a
single page mapped. Ensure that we clear folio to NULL at the top so
it's always set.

Reported-by: default avatarkernel test robot <lkp@intel.com>
Reported-by: default avatarDan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/202302241432.YML1CD5C-lkp@intel.com/


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 57bebf80

io_uring/rsrc.c

+1 −1
Original line number Diff line number Diff line
@@ -1210,7 +1210,7 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, struct iovec *iov, 
	unsigned long off;

	size_t size;

	int ret, nr_pages, i;

	struct folio *folio;

	struct folio *folio = NULL;



	*pimu = ctx->dummy_ubuf;

	if (!iov->iov_base)