That can happen if duplicate UDP packet arrived, and that's not uncommon. Anyway, we ignore packets with rpc_id lower than last we sent for other requests, so it makes sense to do that for read request as well.

Signed-off-by: Vasily Khoruzhick anarsoul@gmail.com --- net/nfs.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/net/nfs.c b/net/nfs.c index 83ed0a7c37..9a16765ba1 100644 --- a/net/nfs.c +++ b/net/nfs.c @@ -822,6 +822,8 @@ static void nfs_handler(uchar *pkt, unsigned dest, struct in_addr sip,

case STATE_READ_REQ: rlen = nfs_read_reply(pkt, len); + if (rlen == -NFS_RPC_DROP) + break; net_set_timeout_handler(nfs_timeout, nfs_timeout_handler); if (rlen > 0) { nfs_offset += rlen;