lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:   Sat,  9 Apr 2022 23:30:53 +0200
From:   Toke Høiland-Jørgensen <>
To:     Alexei Starovoitov <>,
        Daniel Borkmann <>,
        Andrii Nakryiko <>,
        Martin KaFai Lau <>,
        Song Liu <>, Yonghong Song <>,
        John Fastabend <>,
        KP Singh <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,
        Jesper Dangaard Brouer <>,
        Toke Høiland-Jørgensen <>
Cc:     Freysteinn Alfredsson <>,
        Paolo Abeni <>,,
Subject: [PATCH bpf] bpf: Fix release of page_pool in BPF_PROG_RUN

The live packet mode in BPF_PROG_RUN allocates a page_pool instance for
each test run instance and uses it for the packet data. On setup it creates
the page_pool, and calls xdp_reg_mem_model() to allow pages to be returned
properly from the XDP data path. However, xdp_reg_mem_model() also raises
the reference count of the page_pool itself, so the single
page_pool_destroy() count on teardown was not enough to actually release
the pool. To fix this, add an additional xdp_unreg_mem_model() call on

Fixes: b530e9e1063e ("bpf: Add "live packet" mode for XDP in BPF_PROG_RUN")
Reported-by: Freysteinn Alfredsson <>
Signed-off-by: Toke Høiland-Jørgensen <>
 net/bpf/test_run.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index e7b9c2636d10..af709c182674 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -108,6 +108,7 @@ struct xdp_test_data {
 	struct page_pool *pp;
 	struct xdp_frame **frames;
 	struct sk_buff **skbs;
+	struct xdp_mem_info mem;
 	u32 batch_size;
 	u32 frame_cnt;
@@ -147,7 +148,6 @@ static void xdp_test_run_init_page(struct page *page, void *arg)
 static int xdp_test_run_setup(struct xdp_test_data *xdp, struct xdp_buff *orig_ctx)
-	struct xdp_mem_info mem = {};
 	struct page_pool *pp;
 	int err = -ENOMEM;
 	struct page_pool_params pp_params = {
@@ -174,7 +174,7 @@ static int xdp_test_run_setup(struct xdp_test_data *xdp, struct xdp_buff *orig_c
 	/* will copy '' into pp->xdp_mem_id */
-	err = xdp_reg_mem_model(&mem, MEM_TYPE_PAGE_POOL, pp);
+	err = xdp_reg_mem_model(&xdp->mem, MEM_TYPE_PAGE_POOL, pp);
 	if (err)
 		goto err_mmodel;
@@ -202,6 +202,7 @@ static int xdp_test_run_setup(struct xdp_test_data *xdp, struct xdp_buff *orig_c
 static void xdp_test_run_teardown(struct xdp_test_data *xdp)
+	xdp_unreg_mem_model(&xdp->mem);

Powered by blists - more mailing lists