linux-kernel - [PATCH 5.4 019/168] samples, bpf: Add missing munmap in xdpsock

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Message-Id: <20210315135550.976065939@linuxfoundation.org>
Date:   Mon, 15 Mar 2021 14:54:11 +0100
From:   gregkh@...uxfoundation.org
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Björn Töpel <bjorn.topel@...el.com>
Subject: [PATCH 5.4 019/168] samples, bpf: Add missing munmap in xdpsock

From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

From: Maciej Fijalkowski <maciej.fijalkowski@...el.com>

commit 6bc6699881012b5bd5d49fa861a69a37fc01b49c upstream.

We mmap the umem region, but we never munmap it.
Add the missing call at the end of the cleanup.

Fixes: 3945b37a975d ("samples/bpf: use hugepages in xdpsock app")
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
Acked-by: Björn Töpel <bjorn.topel@...el.com>
Link: https://lore.kernel.org/bpf/20210303185636.18070-3-maciej.fijalkowski@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 samples/bpf/xdpsock_user.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -783,5 +783,7 @@ int main(int argc, char **argv)
 	else
 		l2fwd_all();
 
+	munmap(bufs, NUM_FRAMES * opt_xsk_frame_size);
+
 	return 0;
 }