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io_uring/rsrc: always initialize 'folio' to NULL

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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: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/202302241432.YML1CD5C-lkp@intel.com/
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-02-24 09:54:57 -07:00
parent 57bebf807e
commit 977bc87356
1 changed files with 1 additions and 1 deletions
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2
io_uring/rsrc.c
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@ -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)