| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.12 018/178] libbpf: Fixes incorrect rx_ring_setup_done | Date | Mon, 21 Jun 2021 18:13:52 +0200 |
| |
From: Kev Jackson <foamdino@gmail.com>
[ Upstream commit 11fc79fc9f2e395aa39fa5baccae62767c5d8280 ]
When calling xsk_socket__create_shared(), the logic at line 1097 marks a boolean flag true within the xsk_umem structure to track setup progress in order to support multiple calls to the function. However, instead of marking umem->tx_ring_setup_done, the code incorrectly sets umem->rx_ring_setup_done. This leads to improper behaviour when creating and destroying xsk and umem structures.
Multiple calls to this function is documented as supported.
Fixes: ca7a83e2487a ("libbpf: Only create rx and tx XDP rings when necessary") Signed-off-by: Kev Jackson <foamdino@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/YL4aU4f3Aaik7CN0@linux-dev Signed-off-by: Sasha Levin <sashal@kernel.org> --- tools/lib/bpf/xsk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/bpf/xsk.c b/tools/lib/bpf/xsk.c index 007fe5d59438..fe2bec500bf6 100644 --- a/tools/lib/bpf/xsk.c +++ b/tools/lib/bpf/xsk.c @@ -928,7 +928,7 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr, goto out_put_ctx; } if (xsk->fd == umem->fd) - umem->rx_ring_setup_done = true; + umem->tx_ring_setup_done = true; } err = xsk_get_mmap_offsets(xsk->fd, &off); -- 2.30.2
|