Commit 52dcd177 authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring/zcrx: don't clear not allocated niovs 



Now that area->is_mapped is set earlier before niovs array is allocated,
io_zcrx_free_area -> io_zcrx_unmap_area in an error path can try to
clear dma addresses for unallocated niovs, fix it.

Fixes: 8c0cab0b7bf7 ("io_uring/zcrx: always dma map in advance")
Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/cbcb7749b5a001ecd4d1c303515ce9403215640c.1774780198.git.asml.silence@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 8ae2837d

io_uring/zcrx.c

+4 −2
Original line number Diff line number Diff line
@@ -289,8 +289,10 @@ static void io_zcrx_unmap_area(struct io_zcrx_ifq *ifq, 
		return;

	area->is_mapped = false;



	if (area->nia.niovs) {

		for (i = 0; i < area->nia.num_niovs; i++)

			net_mp_niov_set_dma_addr(&area->nia.niovs[i], 0);

	}



	if (area->mem.is_dmabuf) {

		io_release_dmabuf(&area->mem);