[PATCH 4.19 40/79] xdp: unpin xdp umem pages in error path

[Greg Kroah-Hartman]

From: Ivan Khoronzhuk <ivan.khoronz...@linaro.org>

[ Upstream commit fb89c39455e4b49881c5a42761bd71f03d3ef888 ]

Fix mem leak caused by missed unpin routine for umem pages.

Fixes: 8aef7340ae9695 ("xsk: introduce xdp_umem_page")
Signed-off-by: Ivan Khoronzhuk <ivan.khoronz...@linaro.org>
Acked-by: Jonathan Lemon <jonathan.le...@gmail.com>
Signed-off-by: Daniel Borkmann <dan...@iogearbox.net>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 net/xdp/xdp_umem.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index a3b037fbfecde..8cab91c482ff5 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -322,7 +322,7 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct 
xdp_umem_reg *mr)
        umem->pages = kcalloc(umem->npgs, sizeof(*umem->pages), GFP_KERNEL);
        if (!umem->pages) {
                err = -ENOMEM;
-               goto out_account;
+               goto out_pin;
        }
 
        for (i = 0; i < umem->npgs; i++)
@@ -330,6 +330,8 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct 
xdp_umem_reg *mr)
 
        return 0;
 
+out_pin:
+       xdp_umem_unpin_pages(umem);
 out_account:
        xdp_umem_unaccount_pages(umem);
        return err;
-- 
2.20.1