From 7084a315897715776d1764f5fd9250609e515beb Mon Sep 17 00:00:00 2001 From: Ken-ichirou MATSUZAWA Date: Fri, 28 Aug 2015 16:05:20 +0900 Subject: [PATCH] netlink: mmap: fix lookup frame position __netlink_lookup_frame() was always called with the same "pos" value in netlink_forward_ring(). It will look at the same ring entry header over and over again, every time through this loop. Then cycle through the whole ring, advancing ring->head, not "pos" until it equals the "ring->head != head" loop test fails. Signed-off-by: Ken-ichirou MATSUZAWA Signed-off-by: David S. Miller --- net/netlink/af_netlink.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 3eea0b2a3239..7965ca7c461d 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -611,11 +611,11 @@ static void netlink_increment_head(struct netlink_ring *ring) static void netlink_forward_ring(struct netlink_ring *ring) { - unsigned int head = ring->head, pos = head; + unsigned int head = ring->head; const struct nl_mmap_hdr *hdr; do { - hdr = __netlink_lookup_frame(ring, pos); + hdr = __netlink_lookup_frame(ring, ring->head); if (hdr->nm_status == NL_MMAP_STATUS_UNUSED) break; if (hdr->nm_status != NL_MMAP_STATUS_SKIP) -- 2.39.5