Patch "samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp1" has been added to the 4.14-stable tree

Patch "samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp1" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp1

to the 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     samples-bpf-adjust-rlimit-rlimit_memlock-for-xdp1.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Dec 18 13:28:59 CET 2017
From: Tushar Dave <tushar.n.dave@oracle.com>
Date: Fri, 27 Oct 2017 16:12:30 -0700
Subject: samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp1

From: Tushar Dave <tushar.n.dave@oracle.com>


[ Upstream commit 6dfca831c03ef654b1f7bff1b8d487d330e9f76b ]

Default rlimit RLIMIT_MEMLOCK is 64KB, causes bpf map failure.
e.g.
[root@lab bpf]#./xdp1 -N $(</sys/class/net/eth2/ifindex)
failed to create a map: 1 Operation not permitted

Fix it.

Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 samples/bpf/xdp1_user.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/samples/bpf/xdp1_user.c
+++ b/samples/bpf/xdp1_user.c
@@ -14,6 +14,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <libgen.h>
+#include <sys/resource.h>
 
 #include "bpf_load.h"
 #include "bpf_util.h"
@@ -69,6 +70,7 @@ static void usage(const char *prog)
 
 int main(int argc, char **argv)
 {
+	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
 	const char *optstr = "SN";
 	char filename[256];
 	int opt;
@@ -91,6 +93,12 @@ int main(int argc, char **argv)
 		usage(basename(argv[0]));
 		return 1;
 	}
+
+	if (setrlimit(RLIMIT_MEMLOCK, &r)) {
+		perror("setrlimit(RLIMIT_MEMLOCK)");
+		return 1;
+	}
+
 	ifindex = strtoul(argv[optind], NULL, 0);
 
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);


Patches currently in stable-queue which might be from tushar.n.dave@oracle.com are

queue-4.14/samples-bpf-adjust-rlimit-rlimit_memlock-for-xdp1.patch